CN100424786C - Sealed enclosure of nuclear reactor and construction method thereof - Google Patents

Abstract

A nuclear reactor sealed shell, which is made of reinforced concrete, which accommodates the nuclear reactor pressure vessel, and the shell is housed in the nuclear reactor building, the sleeve of the cylindrical part is pre-assembled on the outside of the building, and the reinforcement part contains the internal fittings. The reinforcement assembly is placed on the outer periphery of the sleeve, and the inner reinforcement assembly is pre-assembled on the outside of the building, so that the sleeve and the assembly are hoisted into the building and installed on its foundation. There are outer reinforcement assemblies assembled so as to be arranged on the outer peripheral side of the inner reinforcement assemblies, and cylindrical concrete walls are formed on the inner and outer reinforcement assemblies by pouring concrete.

Description

Sealed enclosure of nuclear reactor and construction method thereof

This application is a divisional application of Chinese patent application No. 99108108.0.

technical field

The invention relates to the construction technology of atomic reactor buildings built in atomic power plants, in particular to placing nuclear reactor sealed casings in nuclear reactor buildings, which are nuclear reactor sealed casings made of reinforced concrete and a construction method thereof.

Background technique

In an atomic power plant the nuclear reactor containment enclosure is placed inside the nuclear reactor building. The sealed casing of the nuclear reactor is constructed of reinforced concrete, and a concrete frame with inner reinforcement and outer reinforcement is arranged on the outer side of the cylindrical steel sleeve. For example, the construction of the sealed shell of the nuclear reactor in the improved boiling water atomic power plant (hereinafter referred to as the ABWR atomic power plant) is a key process in the construction of the ABWR atomic power plant.

The construction method of the conventional reinforced concrete nuclear reactor containment vessel (hereinafter abbreviated as RCCV) will be described by taking the ABWR nuclear power plant as an example with reference to FIGS. 16 to 19 .

16 is a partial cross-sectional view showing an overview of the interior of the nuclear reactor building 1 of the ABWR nuclear power plant. RCCV2 is located in the nuclear reactor building 1, and the nuclear reactor pressure vessel 3 is located in the RCCV2. The nuclear reactor pressure vessel 3 is supported by a nuclear reactor pressure vessel support base (hereinafter referred to as RTV support base) 5 established on the nuclear reactor building bottom pad 4 serving as a base ground.

On the other hand, RCVV2, as shown in FIG. 16, is a reinforced concrete structure composed of a cylindrical wall 6 and an upper plate 7 called a roof. RCCV2 is installed at the ABWR Nuclear Power Plant during construction as shown in FIGS. 17 to 19. factory. Fig. 17 is a cross-sectional view of the cylindrical wall 6 of RCCV2 during construction, Fig. 18 is a cross-sectional view showing the construction of the partition layer (Dia frame floor) 8, and Fig. 19 is a cross-sectional view showing the construction of the RCCV2 roof.

RCCV2 As shown in Figure 17, the inner reinforcement 11 and the outer reinforcement 12 are provided on the outer circle side of the steel sleeve (ライナ) 10. On the other hand, the installation on the steel sleeve 10 has an anchoring effect in the concrete. T-shaped anchor (T-shaped anchor)13. The steel sleeve 10 is pre-assembled in the factory or on the ground near the construction site to the segmented sleeve components, manufactured into a cylindrical shape, and stacked semi-circular, sleeve-shaped or ring-shaped prefabricated sleeve components into a Multi-stage structure to form a cylinder or sleeve.

When constructing RCVV2, as shown in Figure 16 and Figure 17, after the nuclear reactor building base pad 4 is constructed, utilize the crane to hoist the first section sleeve 15 as the sleeve member into the nuclear reactor building 1, The first stage sleeve 15 is installed on the base pad 4 of the nuclear reactor building. The height of the first stage sleeve 15 is generally made into a whole until the pressure suppression chamber sleeve 16 and the sleeve partition sleeve 17.

On the first stage sleeve 15 of the steel sleeve 10, as shown in FIG. , The orifice (ハツチ) 19 for machine transport and exit. Since a part of the pipe penetration 18 has a double casing structure, the load is heavy, so the penetration 18 with a large diameter is temporarily supported by a temporarily installed member 20 such as a diagonal rod or the like. The orifice 19 is likewise supported with temporary setting elements and hoisted into the site.

After the first section sleeve 15 was hoisted in, the outer circle side of the first section sleeve 15 began to carry out reinforced concrete construction. The inner reinforcement 11 and the outer reinforcement 12 of RCCV2 are constructed, the outer frame 22 is installed, and concrete is poured. The first stage sleeve 15 doubles as an inner frame when pouring concrete. RCCV concrete pouring, since RCCV itself is a part of the main body of the nuclear reactor building, generally the nuclear reactor building 1 is constructed layer by layer.

While carrying out the RCCV concrete construction of the first stage sleeve 15, the RCCV bottom sleeve (ライナ) 23, the RPV support base 5, the pressure suppression chamber access tunnel 24, etc. are formed inside the RCCV2 as shown in Figure 16. Buildings are assembled. The RPV supporting base 5 is made of steel, and its structure is filled with cement slurry inside.

When the internal structure of the pressure suppression chamber 25 is installed to a certain extent, the next sleeve member, that is, the second-stage sleeve 26 is hoisted. The second-stage sleeve 26 is also the same as the first-stage sleeve 15, and the ring-shaped segmented members are assembled into a cylindrical shape in advance in the factory or on the ground near the construction site. The penetrations 18 and openings 19 with large diameters are supported by temporary components and hoisted into the site. The second section of the sleeve 26 generally takes the dry well sleeve 27 as a whole. A dry well 28 is formed inside surrounded by the dry well sleeve 27 .

After the second-stage sleeve 26 is hoisted, the peripheries of the first-stage sleeve 15 and the second-stage sleeve 26 are welded. After the surrounding welding is completed, the same as the first segment sleeve 15 shown in Figure 17, the reinforced concrete construction is started on the outer circle side of the second segment sleeve 26, and the inner reinforcement 11, outer reinforcement 12 and The outer formwork frame 22 is poured with concrete.

On the other hand, when the entry of the internal structures in the pressure suppression chamber 25 is completed, the construction of the partition layer (hereinafter referred to as DF) is started as shown in FIG. 18 . The partition layer (DF) 8 is a structure composed of a steel plate sealing plate 30 and a reinforced concrete 31. The RCCV2 is separated (divided) into a lower pressure suppression chamber 25 and an upper dry well 28 with DF8 as a boundary. The separator layer 8 is structurally supported by the RCCV cylindrical wall 6 , the inner end is supported by the RPV support base 5 , and the outer end is supported by the separator sleeve 17 .

For the construction of the partition layer 8, the temporary support structure 33 is first installed to support the construction load of the sealing plate 30 and the reinforced concrete 31 of the DF8. The temporarily installed support structure 33 in FIG. 18 shows a support method using steel materials protruding from the RPV support base 5 . But there are also other support methods, that is, with the progress of the concrete body of the RCCV cylinder part, use the RPV support base 5 and the two ends of the RCCV2 to support, and install the temporary support from the bottom pad 4 of the nuclear reactor building as in the general building support.

After the installation of the temporarily installed supporting structure 33 is completed, the installation of the steel plate sealing plate 30 is performed. Sealing plate 30, generally is that the plate member that is divided into 3～4 sectors is hanged on the supporting structure 33 that is set temporarily, and it is assembled into a circular or semi-circular convex whole by welding.

After the installation of the sealing plate 30 is completed, and the internal grouting of the RPV support base 5 is completed, reinforcement construction is performed. The reinforcement body 34 of the partition layer is a radial circular reinforcement, and the outer end of the radial circular reinforcement 34 is connected to the reinforcement connector 35 fixed on the partition sleeve 17 through the grouting longitudinal butt joint connection method superior.

After the reinforcement construction is completed, the cement pouring construction will be carried out. After confirming the strength of the DF reinforced concrete 31, start to move the internal structural parts into the upper dry shaft 28, and simultaneously remove the temporary supporting structural parts 33 of the DF.

After the loading of the internal structure of the upper dry shaft 28 is completed, and when the cement pouring of the cylindrical portion 6 of the RCCV2 reaches the bottom of the top plate (top slab) 7, the construction of the RCCV top plate 7 starts as shown in FIG. 19 . The roof 7 is composed of a steel plate roof sleeve 37 , an RCCV inner flange 38 and reinforced concrete 39 , and is cantilevered from the RCVV cylindrical portion 6 .

Before the construction of the top plate 7, the support column frame is installed on the nuclear reactor shield wall 40 installed in the upper dry well 28 and can be removed. In addition, the support is installed on the surface of the RCCV cylindrical part 6 that has been poured with cement. Prop 43 used.

The roof 7 is prefabricated into an integral structure on the ground near the site in advance with the roof sleeve 37, the RCCV lower flange 38, the orthogonal reinforcement 44 and the internal support structure 45, and then lifted into it.

The inner support structure 45 is used as a support structure when the prefabricated and assembled roof 7 is hoisted in, and at the same time, the support bracket 41 of the nuclear reactor shield wall 40 and the pillar 43 of the RCCV cylindrical part are used to support the inner support. The material of the structural part 45 is used to support the load when the top plate 7 is installed and when pouring cement.

After the top plate 7 prefabricated and assembled into an integral structure is hoisted in, the periphery of the second sleeve 26 and the top plate sleeve 37 is welded. This welding is performed by a single-side welding method from the inside of the RCCV2.

In parallel with the sleeve welding operation, the construction of the reinforcement 46 of the inner and outer reinforcements 11, 12 of the RCCV cylinder part 6 and the inter-tensioning part of the orthogonal reinforcement (roof reinforcement) 44 is carried out at the same time. After the reinforcement 46 of the mutual tension part is completed, a formwork frame is installed outside the RCCV cylinder part of the top plate 7, and cement pouring is carried out. Then, after confirming the strength of the ceiling cement 39, the support bracket 41 of the nuclear reactor shield wall 40 is removed.

In the past RCCV construction method, the construction of the RCCV cylinder part 6 was carried out after the steel sleeve 10 was hoisted in and installed, and then the reinforcement work of the RCCV2 was started. Therefore, it is first necessary to set up the scaffolding for the inner reinforcement work of the RCCV, and then carry out the reinforcement work of the inner reinforcement 11 of the RCCV. After the reinforcement operation of the inner reinforcement 11 of the RCCV is completed, the scaffolding must be removed, and then the scaffolding for the outer reinforcement operation of the RCCV is erected to carry out the reinforcement operation of the outer reinforcement 12. Therefore, the construction of RCCV2 takes a long time cycle time.

Furthermore, in the construction of the RCCV partition layer in the past, after the second-stage sleeve 26 was hoisted in, the supporting structure 33, the sealing plate 30 and the reinforcement work 34 were temporarily installed on site, so, It is necessary to carry out the work of loading into the narrow place between the second-stage sleeve 26 and the RPV support base 5, and the work efficiency is not high.

In addition, in the construction of the roof part of RCCV2 in the past, since the roof reinforcement 44 is a vertical reinforcement when the roof 7 and the RCCV cylindrical part 6 are pulled together, and the reinforcements 11 and 12 of the RCCV cylindrical part 6 rise upwards, Form a garden shape or a cylinder shape, so if the longitudinal reinforcement 11, 12 of the RCCV cylinder part 6 first rises to the top plate fixing place, then when the top plate 7 prefabricated into an integral structure is hoisted in, the top plate is perpendicular to the reinforcement 44 and the fixed part of the RCCV cylindrical longitudinal reinforcement 11, 12 will interfere (collide). The inner and outer reinforcements 11 and 12 of the RCCV cylindrical part 6 are temporarily stopped under the roof 7, and after the hoisting operation of the roof 7 is completed, the reinforcement 46 of the RCCV cylindrical part and the fixed part of the roof 7 are mutually pulled together. Reinforcement work, the mutual pull reinforcement work is the main reason why the roof construction process cannot be shortened.

In addition, in the construction of the roof portion of RCCV2, in order to support the load when installing the roof 7 and pouring cement, support brackets 41 are attached to the nuclear reactor shield wall 40 . In order to prevent the inner end of the inner support structure 45 of the supporting bracket 41 from colliding with the ring-shaped outermost reinforcement of the roof perpendicular reinforcement 44, the inner end of the inner support structure 45 is stopped in front of the outermost reinforcement. Therefore, the support bracket 41 is required. The supporting bracket 41 must be removed after the concrete of the roof 7 reaches a certain strength, so as not to affect the installation of formally installed structural parts.

Furthermore, since the through-piece 18 and the hole 19 installed on the steel sleeve 10 of RCCV2 in the past are temporarily supported from the steel sleeve 10 with a temporary inclined rod 20, etc., the RCCV sleeve 10 is hoisted into In the stage of carrying out the reinforcement operation of RCCV reinforcement 11 and 12 afterward, the member which affects the reinforcement operation needs to be refitted, so the RCCV reinforcement operation is complicated.

Contents of the invention

The present invention is proposed in consideration of the above situation, and its purpose is to provide a nuclear reactor sealed casing and a construction method thereof, which can greatly reduce the RCCV construction operations in the construction site, improve the efficiency of RCCV construction operations, ensure safety, and greatly Significantly reduce the RCCV construction process and shorten the construction period.

Another object of the present invention is to provide such a nuclear reactor sealed casing and its construction method, that is, the inner side reinforcement of the RCCV is independently assembled on the outside of the steel cylindrical part sleeve on the ground near the site, and the steel sleeve The cylinder and the inner reinforcement are hoisted into the specified position on the construction site at the same time, which saves the RCCV inner reinforcement operation (building scaffolding, configuring steel bars, dismantling scaffolding) in the construction site, and can shorten the construction process of RCCV.

Another object of the present invention is to provide such a nuclear reactor sealed casing and its construction method, that is, the partition layer sleeve assembly and the roof assembly are assembled on the ground that is convenient for operation in advance, and then hoisted into the construction site, so that The work on the construction site can be greatly reduced.

Another object of the present invention is to provide such a nuclear reactor sealed shell and its construction method, that is, the top plate reinforcement body and the fixed part of the RCCV cylinder part pull each other according to the reinforcement of the RCCV cylinder part. The rib joints are bent into a radial shape, so that the roof components can be hoisted in without affecting the reinforcement of the RCCV cylinder, which can reduce the mutual tension and reinforcement of the fixed part after the roof is hoisted in, and can greatly reduce the roof construction process.

Moreover, another object of the present invention is to provide such a nuclear reactor containment enclosure and construction method thereof, that is, the inner end of the inner support structure of the roof assembly can be supported from the upper part of the nuclear reactor shielding wall without requiring There is no need to remove the supporting brackets installed on the shielding wall.

Another object of the present invention is to provide such a nuclear reactor sealed casing and construction method thereof, that is, by supporting the penetrations and openings from the pre-installed (advanced) steel bars of the nuclear reactor building, it is possible to prevent damage to the reinforcement work. Influence, can reduce the complexity of construction.

To achieve the above object, the present invention takes the following technical solutions:

A nuclear reactor sealed enclosure, which is made of reinforced concrete, is used to accommodate nuclear reactor pressure vessels and is accommodated in nuclear reactor buildings; the above-mentioned nuclear reactor sealed enclosure includes:

a cylindrical wall portion having a substantially cylindrical shape and mounted on a foundation portion of a nuclear reactor building;

a partition layer part, which is arranged in the cylindrical wall part and serves to divide the space in the cylindrical wall part where it is located into upper and lower chambers,

a shielding wall installed on the bulkhead level and intended to surround the nuclear reactor pressure vessel to shield radiation from the nuclear reactor pressure vessel; and

a top plate portion installed on the upper portion of the installed cylindrical wall portion so as to cover the upper portion,

It is characterized in that the above-mentioned top plate part includes:

A roof assembly pre-assembled into a modular structure on the outside of the nuclear reactor building, said roof assembly being hoisted into the nuclear reactor building for installation on the cylindrical wall portion and the shield wall; and

A concrete wall formed on the roof assembly by pouring concrete in the roof assembly.

The sealed casing of nuclear reactor as described in technical solution 1, which is made of reinforced concrete, is characterized in that the above-mentioned top plate assembly includes a roughly disc-shaped top plate sleeve, a top plate reinforcement body, a frame insertion rib on the top plate, and a supporting structure carrying the load of the roof assembly, and a flange fitted on the inner peripheral side of the roof sleeve,

The above-mentioned roof assembly is assembled into a substantially disc shape by assembling the roof sleeve, the roof reinforcement body, the roof upper frame insert ribs, the support structure and the flange on the outside of the nuclear reactor building.

The sealed casing of nuclear reactor as described in technical solution 2, which is made of reinforced concrete, is characterized in that the support structure of the above-mentioned roof assembly has many support structure materials to bear the load of the roof assembly, and the above-mentioned support structure material is radial. arrangement, and the inner end of the supporting structure material is temporarily supported on the shielding wall respectively by the first temporary supporting device. The sections are respectively supported on the cylindrical wall sections by the second temporary support means.

The sealed shell of nuclear reactor as described in technical solution 3 is made of reinforced concrete, and it is characterized in that the above-mentioned top plate reinforcement body contains many top plate reinforcements, and these top plate reinforcements are arranged in a roughly disc shape as a whole, and each of the above-mentioned supporting The structural material has an innermost end respectively, and each of the above-mentioned roof reinforcements also has an innermost end respectively, and each supporting structural material has an innermost end and each roof reinforcement has an innermost end. At least one of them is bent so as to prevent the innermost end on each support structure material from colliding with the innermost end on each roof reinforcement.

The sealed casing of nuclear reactor as described in technical solution 4, which is made of reinforced concrete, is characterized in that there are many vertical reinforcements on the above-mentioned cylindrical wall, and these reinforcements are vertically arranged relative to the foundation part, and each of the above-mentioned roofs There are respectively outermost ends on the reinforcement, and the outermost end of each roof reinforcement is bent to extend radially, which prevents the outermost end of each roof reinforcement from colliding with each vertical reinforcement. conflict.

A method for constructing a nuclear reactor containment enclosure for accommodating a nuclear reactor pressure vessel, made of reinforced concrete, characterized in that the method comprises the following steps:

fitting a cylindrical wall portion having a substantially cylindrical shape on a foundation portion in a nuclear reactor building;

Assembling a shielding wall on the partition layer, the above-mentioned shielding wall is used to surround the nuclear reactor pressure vessel to shield the radiation emitted by the nuclear reactor pressure vessel;

mounting the support on the cylindrical wall in a detachable manner;

Pre-assembly of roof assemblies on the outside of the nuclear reactor building;

Hoisting the roof assembly into the nuclear reactor building and installing it on supports and shield walls; and

Concrete is poured in the roof assembly to form concrete walls on the roof assembly.

The method as described in technical solution 6, is characterized in that the above-mentioned assembling step includes a step of: preparing a substantially disk-shaped roof sleeve, a roof reinforcement body, a frame insertion rib on the roof, and a support for carrying the roof assembly The supporting structural member of the load also includes a step of assembling the roof sleeve, the roof reinforcement body, the frame insertion ribs on the roof and the supporting structural member into a roughly disc shape on the outside of the nuclear reactor building.

The method according to technical solution 7, wherein the assembling step includes a step of preparing a flange having a substantially disk shape, and a step of assembling the flange on the top plate sleeve on the outside of the nuclear reactor building. In the lower part, there are many supporting structural materials on the supporting structure of the above-mentioned roof assembly to bear the load of the roof assembly, each of the above-mentioned supporting structures has an innermost end and is distributed radially, and the above-mentioned roof reinforcement body contains A plurality of roof reinforcements arranged generally in a generally disc shape, each of said roof reinforcements having an innermost end, and further comprising the step of processing each support structure material on the outside of the nuclear reactor building at least one of the innermost end on each roof bar and the innermost end on each roof bar to bend it so as to prevent The innermost ends collide with each other.

The method as described in technical solution 8, is characterized in that, the above-mentioned cylindrical wall has many vertical reinforcements, these reinforcements are vertically arranged relative to the foundation part, and each of the above-mentioned roof reinforcements has an outermost end , the method also includes the step of treating the outermost end of each of the above-mentioned roof bars to bend and stretch radially so as to prevent the outermost end of each roof bar and each vertical bar from Conflict.

The method according to technical solution 9 is characterized in that the above-mentioned innermost end portion and the above-mentioned outermost end portion of each roof reinforcement are respectively connected to the roof reinforcement through connecting members.

The method as described in technical solution 6, wherein the support structure of the above-mentioned roof assembly has many support structure materials, and the above-mentioned support structure materials are radially arranged, and the method also includes the following steps:

Installing the first temporary support device on the shielding wall in a detachable manner;

installing the second temporary support device on the cylindrical wall in a detachable manner;

supporting the inboard end of each support structure material on the first temporary support means; and

The outboard ends of each support structural material are supported on second temporary support means so that the load of the roof assembly is supported on the inboard and outboard ends of each support structural material, respectively.

A method for constructing a nuclear reactor containment for accommodating a nuclear reactor pressure vessel, made of reinforced concrete, characterized in that the method comprises the following steps:

Pre-assemble a cylindrical sleeve on the outside of the nuclear reactor building;

Preliminarily assembling a reinforcing member on the outer side of the nuclear reactor building by using a frame or a pillar so that the reinforcing member is placed on the outer peripheral side of the sleeve of the cylindrical portion;

hoisting the barrel sleeve and reinforcement assembly into the nuclear reactor building for installation of the barrel sleeve and reinforcement assembly on the nuclear reactor building foundation section; and

Concrete is poured in the reinforcement assembly to form a cylindrical concrete wall on the reinforcement assembly.

The method described above is characterized in that the above-mentioned cylindrical portion sleeve and reinforcement assembly are hoisted separately and simultaneously into the nuclear reactor building.

The method described above is characterized in that the above-mentioned reinforcement assembly is composed of many reinforcement units, each reinforcement unit has a substantially cylindrical shape and is coaxially arranged, and each of the above-mentioned reinforcement units is formed by covering the cylinder part The circumferential direction of the cylinder is formed by arranging vertical reinforcements at equal distances and adding horizontal reinforcements to the vertical reinforcements, so that the horizontal reinforcements are orthogonal to the vertical reinforcements and arranged equidistantly along the axial direction of the cylindrical sleeve. The method also includes the following steps:

The supporting reinforcement units are preliminarily installed on the foundation part along the radial direction of the cylindrical sleeve at equal distances, and each of the above-mentioned supporting reinforcing units has supporting reinforcements arranged along the circumferential direction of the cylindrical sleeve respectively. The reinforcement faces each vertical reinforcement in the installed reinforcement assembly and has a different length in each supporting reinforcement element; and

Connect each vertical reinforcement in the corresponding reinforcement element of the installed reinforcement assembly to the corresponding support reinforcement in the support reinforcement element respectively.

The method is characterized in that it also includes the following steps:

Install a temporary support device on the formed concrete wall;

Pre-assemble a second cylindrical sleeve on the outside of the nuclear reactor building;

Assembling a second reinforcement assembly on the outside of the nuclear reactor building in advance, so that the second reinforcement assembly is arranged radially on the outer peripheral side of the second cylindrical sleeve;

hoisting the second barrel sleeve and the second reinforcement assembly into the nuclear reactor building to install the second barrel sleeve over the barrel sleeve installed on the foundation portion;

supporting the second reinforcement assembly in the nuclear reactor building by temporary support means such that the second reinforcement assembly is suspended from the temporary support means; and

The second cylindrical sleeve is welded to the cylindrical sleeve installed on the foundation section, while the second reinforcement assembly is suspended from the temporary support means.

A nuclear reactor sealed enclosure, which is made of reinforced concrete, is used to accommodate nuclear reactor pressure vessels and is contained in nuclear reactor buildings; it is characterized in that the above-mentioned nuclear reactor sealed enclosure includes:

The cylindrical sleeve, which is pre-assembled on the outside of the nuclear reactor building;

a reinforcing part which contains a reinforcing member which is pre-assembled on the outer side of the nuclear reactor building by using a skeleton or a pillar and is arranged in the outer peripheral side of the sleeve of the cylindrical part,

The above-mentioned cylindrical portion sleeve and the above-mentioned reinforcement assembly are hoisted into the nuclear reactor building so as to be able to be installed on the foundation portion of the nuclear reactor building; and

A cylindrical concrete wall that is formed on a reinforcing element by pouring concrete in the reinforcing element.

The nuclear reactor sealed enclosure is characterized in that the cylindrical sleeve and the reinforcement assembly are assembled on the outside of the nuclear reactor building.

The sealed casing of the nuclear reactor is characterized in that the above-mentioned cylindrical portion sleeve has a cylindrical portion lower sleeve arranged on the foundation portion, and a cylindrical portion lower sleeve is coaxially connected with the cylindrical portion sleeve and extends from the cylindrical portion an annular partition sleeve protruding upward from the lower sleeve of the cylindrical part, and an upper sleeve of the cylindrical part coaxially connected with the annular partition sleeve and protruding outward from the annular partition sleeve, The above-mentioned reinforcement assembly has a lower reinforcement assembly installed on the foundation part and arranged on the outer peripheral side of the lower sleeve of the cylindrical part, and a lower reinforcement assembly connected to the lower reinforcement assembly through a connecting part and arranged on the upper sleeve of the cylindrical part. The upper reinforcement assembly on the outer peripheral side, and the above-mentioned lower sleeve of the cylindrical part and the above-mentioned lower reinforcement assembly are assembled on the outside of the nuclear reactor building, and the upper sleeve of the above-mentioned cylindrical part and the above-mentioned upper reinforcement assembly are assembled in The outer side of the nuclear reactor building is assembled separately from the lower sleeve of the above-mentioned cylindrical part and the above-mentioned lower reinforcement assembly.

A nuclear reactor sealed enclosure, which is made of reinforced concrete, is used to accommodate a nuclear reactor pressure vessel and is accommodated in a nuclear reactor building; the above-mentioned nuclear reactor sealed enclosure includes:

A nuclear reactor pressure vessel support base installed on a foundation portion of a nuclear reactor building and used to support the nuclear reactor pressure vessel;

a cylindrical wall portion having a substantially cylindrical shape and installed on the foundation portion of the nuclear reactor building, the above-mentioned nuclear reactor pressure vessel support base being placed inside the cylindrical wall portion; and

a partition layer supported on an inner peripheral portion of the cylindrical wall portion and for separating a space in the installed cylindrical wall portion into a dry well and a pressure containment chamber,

It is characterized in that the above-mentioned separator layer part includes:

a bulkhead sleeve assembly preassembled as a modular structure on the outside of the nuclear reactor building, said bulkhead sleeve assembly being hoisted into the nuclear reactor building for installation therein; and

A concrete wall is formed on the membrane layer sleeve assembly by pouring concrete in the membrane layer sleeve assembly.

The sealed casing of the nuclear reactor is made of reinforced concrete, and it is characterized in that the above-mentioned diaphragm layer sleeve assembly includes a diaphragm layer reinforcement body and a load supporting structure for carrying the diaphragm layer sleeve assembly parts, a seal plate to seal the pressure containment chamber, and a bulkhead sleeve,

The above-mentioned diaphragm layer sleeve assembly is integrated into a roughly disc shape by the diaphragm layer reinforcement body, supporting structural members, sealing plate and diaphragm sleeve on the outside of the nuclear reactor building.

Also, the above-mentioned nuclear reactor pressure vessel support base has an upper support portion which is previously fitted on the inner peripheral side of the bulkhead layer sleeve assembly on the outside of the nuclear reactor building so as to be formed with the bulkhead layer sleeve assembly. One.

The sealed casing of the nuclear reactor is made of reinforced concrete, and it is characterized in that the reinforcing body of the above-mentioned partition layer has a roughly disc-shaped shape, and the above-mentioned partition sleeve has a roughly ring-shaped shape,

The above-mentioned partition sleeve is mounted on one outer peripheral side of the partition layer reinforcement body, and the above-mentioned upper support portion of the nuclear reactor pressure vessel support base is fitted in one inner peripheral side of the partition layer reinforcement body,

Also, the above-mentioned bulkhead sleeve is provided with a plurality of shear stiffening plates for reinforcing the bulkhead sleeve, and the above-mentioned shear stiffening plates are arranged at predetermined intervals in the circumferential direction of the bulkhead sleeve.

The sealed casing of the nuclear reactor is made of reinforced concrete, and it is characterized in that each of the above-mentioned shear stiffening plates penetrates the diaphragm sleeve radially, thereby extending radially into both sides of the diaphragm sleeve, and the above-mentioned With T-shaped anchors on the cylindrical wall to strengthen the cylindrical wall, the nuclear reactor containment also contains:

The temporary supporting device is used to temporarily support the sleeve assembly of the diaphragm layer on the T-shaped holder, and the above-mentioned temporary supporting device is respectively arranged between the shear stiffening plate and the outer side of the T-shaped holder in a detachable manner.

The sealed shell of the nuclear reactor is made of reinforced concrete, and it is characterized in that the supporting structure of the above-mentioned partition layer sleeve assembly has many supporting structural materials to carry the load of the partition layer sleeve assembly. The supporting structure materials are radially arranged, and the inner end parts of each supporting structure material are respectively supported on the support base of the nuclear reactor pressure vessel through the temporary support device, while the outer end parts of each supporting structure material are respectively supported on the diaphragm sleeve shear stiffeners.

A nuclear reactor sealed enclosure, which is made of reinforced concrete, is used to accommodate a nuclear reactor pressure vessel and is contained in a nuclear reactor building; it is characterized in that the above-mentioned nuclear reactor sealed enclosure includes:

a cylindrical sleeve pre-assembled on the outside of the nuclear reactor building;

a penetrating member mounted on the barrel sleeve and used to carry equipment into and out of the barrel sleeve;

an aperture mounted on the barrel sleeve for passage of an operator and for passage of at least one pipe;

a reinforcing body arranged on the outer peripheral side of the sleeve of the cylindrical portion, the reinforcing body previously assembled on the outer side of the nuclear reactor building,

The above-mentioned cylindrical part sleeve and the above-mentioned reinforcement body are hoisted into the nuclear reactor building so as to be able to be installed on the foundation part of the nuclear reactor building;

a support member removably secured to the nuclear reactor building and used to support the penetration member and the opening when the barrel sleeve and reinforcing body are hoisted into the nuclear reactor building; and

A cylindrical concrete wall that is formed on the reinforcing element by pouring concrete in the reinforcing element.

A method for constructing a nuclear reactor containment for accommodating a nuclear reactor pressure vessel, made of reinforced concrete, characterized in that the method comprises the following steps:

Assembling a nuclear reactor pressure vessel support base for supporting the nuclear reactor pressure vessel on a foundation portion in a nuclear reactor building;

fitting a cylindrical wall portion having a substantially cylindrical shape on the foundation portion in the nuclear reactor building, the above-mentioned nuclear reactor pressure vessel support base being placed inside the cylindrical wall portion;

Pre-assemble a bulkhead layer sleeve assembly on the outside of the nuclear reactor building;

hoisting the bulkhead sleeve assembly into the nuclear reactor building to fixedly support the bulkhead sleeve assembly on the cylindrical wall portion and the nuclear reactor pressure vessel support base; and

Concrete is poured in the membrane layer sleeve assembly to form a concrete wall on the membrane layer sleeve assembly.

The method described above is characterized in that the above assembling steps include a step of: preparing a diaphragm layer reinforcement body, a support structure for carrying the diaphragm layer sleeve assembly, a sealing plate and a diaphragm sleeve , also includes such a step: on the outer side of the nuclear reactor building, integrally assembling the reinforcement body of the diaphragm layer, the supporting structure, the sealing plate and the diaphragm sleeve into a roughly disc shape.

Said method is characterized in that said assembling step includes a step of preparing an upper support part of a nuclear reactor pressure vessel support base, and further includes a step of fitting the upper support part on a partition in advance on the outside of the nuclear reactor building. On one inner peripheral side of the slab reinforcement body, thus forming a whole.

The method is characterized in that the above-mentioned cylindrical wall is provided with a T-shaped fixture to strengthen the cylindrical wall, and further comprises the following steps:

A shear stiffener is fixedly fitted to the diaphragm sleeve to reinforce the diaphragm sleeve;

as well as

Temporarily support the diaphragm layer sleeve assembly on the T-shaped anchors and shear stiffeners on the cylindrical wall.

The method described above is characterized in that the support structure of the above-mentioned partition layer sleeve assembly is equipped with a plurality of support structure materials for carrying the load of the top plate assembly, the above-mentioned support structure materials are radially arranged, and also includes the following Steps:

A shear stiffener is fixedly fitted to the diaphragm sleeve to reinforce the diaphragm sleeve;

Temporarily supporting the inboard end of the support structure material on the nuclear reactor pressure vessel support base; and

The outboard ends of the support structural material are temporarily supported on the shear stiffeners of the diaphragm sleeve.

A method for constructing a nuclear reactor containment for accommodating a nuclear reactor pressure vessel, made of reinforced concrete, characterized in that the method comprises the following steps:

Pre-assemble a cylindrical sleeve on the outside of the nuclear reactor building;

Assembling a reinforcement assembly on the outside of the nuclear reactor building in advance, so that the reinforcement assembly is placed on the outer peripheral side of the cylindrical sleeve;

fitting a penetrating member on the barrel sleeve for carrying equipment into and out of the barrel sleeve;

fitting an aperture on the barrel sleeve for passage of an operator and for passage of at least one pipe;

Hoisting the cylindrical sleeve and reinforcement assembly into the nuclear reactor building, so as to install the cylindrical sleeve and reinforcement assembly on the foundation part of the nuclear reactor building;

Removably attaching to the nuclear reactor building a support for supporting the penetration member and the opening as the barrel sleeve and reinforcing body are hoisted into the nuclear reactor building; and

Concrete is poured in the reinforcement assembly to form a cylindrical concrete wall on the reinforcement assembly.

In order to solve the above-mentioned problems related to the nuclear reactor containment vessel of the present invention, as described in technical solution 1, in the nuclear reactor containment vessel of reinforced concrete placed in the nuclear reactor building, the cylindrical part sleeve of the nuclear reactor containment vessel is formed. As well as the inner reinforcement of the sealed casing of the nuclear reactor arranged on the outer side of the sleeve, it is pre-assembled on the ground, and then hoisted into the construction site for installation.

And, in order to solve the above-mentioned problem, relate to the nuclear reactor sealed casing of the present invention, as described in technical scheme 2, the cylinder part sleeve of nuclear reactor sealed casing is to connect the cylindrical lower sleeve, the partition sleeve and the cylindrical upper sleeve It is formed as a whole. On the other hand, the inner reinforcement of the sealed shell of the nuclear reactor is directly or through mutual tension reinforcement, and the inner lower reinforcement and the inner upper reinforcement are connected into a whole by using the reinforcement connection method. The cylindrical lower sleeve and the inner lower reinforcement of the nuclear reactor sealed enclosure are assembled, and the cylindrical upper sleeve and the inner upper reinforcement of the nuclear reactor sealed enclosure are installed on the ground.

Furthermore, in relation to the nuclear reactor containment of the present invention, in order to solve the above-mentioned problems, as described in technical solution 3, in the nuclear reactor containment of reinforced concrete placed in the nuclear reactor building, the inside of the above-mentioned nuclear reactor containment is enclosed by a partition layer. It is divided into the upper dry well and the lower pressure suppression chamber. On the other hand, the above-mentioned partition layer is composed of a partition layer sleeve assembly that is pre-assembled on the ground as a whole, and the above-mentioned sleeve assembly is hoisted into the nuclear reactor. In the building, it is placed on the support base of the nuclear reactor sealed casing established on the base of the nuclear reactor building and the cylindrical part sleeve of the nuclear reactor sealed casing for installation.

Moreover, in order to solve the above-mentioned problems, the nuclear reactor sealed casing of the present invention, as described in technical solution 4, the above-mentioned diaphragm layer sleeve assembly is composed of a diaphragm layer reinforcement body, an internal or external support structure, a sealing plate and a diaphragm layer. The plate sleeve is assembled into a whole, which is formed into a disc shape or a semi-circular protruding pin shape. On the inner peripheral side of the separator layer sleeve assembly, the upper section of the support base of the nuclear reactor sealed casing is pre-assembled into a whole on the ground, and, As shown in technical solution 5, on the outer peripheral side of the above-mentioned separator layer sleeve assembly, annular or sleeve-shaped separator sleeves are installed as a whole, and the separator sleeves are arranged at a certain interval in the circumferential direction Fasten many shear stiffening plates (medium plates) for reinforcement.

Moreover, in order to solve the above-mentioned problems, the sealing casing of a nuclear reactor related to the present invention is as described in technical solution 6, and the trimmed medium-thick plate (shear stiffening plate) is fixed so that the partition sleeve protrudes to both sides through the radiation direction, Between the outer side of the partition sleeve and the T-shaped holder that reinforces the sleeve of the cylindrical part of the nuclear reactor sealed casing, a temporary support device is provided in a removable manner, and, as described in technical solution 7, the above-mentioned partition The internal support structure of the layer sleeve assembly is to arrange many internal support structures in a radial shape. The above-mentioned internal support structures keep the reinforcing body of the partition layer at the upper and lower parts. On the other hand, the above-mentioned internal support is The inner end of the structural member is supported on the support base of the nuclear reactor containment enclosure, and the outer end of the above-mentioned inner support structural member is supported on the trimmed plate of the partition sleeve.

On the other hand, in order to solve the above-mentioned problems related to the nuclear reactor sealed enclosure of the present invention, as described in technical solution 8, in the nuclear reactor sealed enclosure made of reinforced concrete located in the nuclear reactor building, the top of the nuclear reactor sealed enclosure is covered with a top plate, The top plate assembly constituting the above-mentioned top plate is hoisted and assembled on the ground in advance, and placed on the nuclear reactor shielding wall and the cylindrical part of the nuclear reactor sealed casing set up on the partition layer to be supported.

Furthermore, in order to solve the above-mentioned problems, the nuclear reactor sealed casing of the present invention, as described in technical solution 9, the roof assembly is to pre-assemble the roof reinforcement body, the internal support structure, the roof sleeve and the upper frame of the roof on the ground. As a whole, and, as described in technical solution 10, the internal support structure of the roof assembly is formed by arranging many internal support structure materials in a radial shape, and the inner end of each internal support structure passes through a removable The temporary support device is supported by the shielding wall of the nuclear reactor, and the outer end of each internal support structure is supported by the temporary support set up on the cylindrical part of the nuclear reactor sealed casing.

Moreover, in order to solve the above-mentioned problems, in the nuclear reactor sealed enclosure of the present invention, as described in technical solution 11, the top plate assembly is provided with at least two parts on the inner peripheral side of the above-mentioned inner outermost reinforcement and the inner end of each inner support structure. One of them is bent to prevent the innermost reinforcement of the roof reinforcement body from colliding with the inner end of the inner support structure. In addition, as described in technical solution 12, the roof assembly is opposed to the outer side of the roof reinforcement body on the outer peripheral side. The outermost reinforcement is bent so that it extends radially.

Furthermore, in order to solve the above-mentioned problems in the nuclear reactor containment enclosure of the present invention, as described in technical claim 13, in the nuclear reactor containment enclosure made of reinforced concrete installed in the nuclear reactor building, the nuclear reactor containment enclosure is sealed from the preceding steel bars of the nuclear reactor building. The penetrations and orifices installed on the cylindrical part of the sleeve are supported.

Furthermore, in relation to the construction method of the nuclear reactor sealed casing of the present invention, in order to solve the above-mentioned problems, as described in technical solution 14, the cylindrical part sleeve of the nuclear reactor sealed casing made of reinforced concrete is made into a whole in advance on the ground. The outer side of the cylindrical part of the sleeve is independently assembled on the ground to the inner reinforcement of the nuclear reactor sealed casing, and the upper part of the cylindrical part of the sleeve and the internal reinforcement are simultaneously hoisted to the specified position on the construction site of the nuclear reactor building by a crane Installation is carried out to construct the nuclear reactor containment enclosure.

Moreover, in order to solve the above-mentioned problems, the construction method of the nuclear reactor sealed casing related to the present invention, as described in technical solution 5, for the nuclear reactor sealed casing reinforcement such as the bottom pad difference ribs fixed in the construction site of the nuclear reactor building, and the reinforcement of the nuclear reactor sealed casing by For the connection of the internal reinforcement of the nuclear reactor sealed casing that is hoisted in, the length of each segment is fixed respectively, and the connection is performed with a reinforcement connection device. In addition, as described in technical scheme 16, the sleeve and the inner side After the reinforcement is hoisted to the construction site at the same time, when the cylindrical sleeve is welded to the original sleeve that has been installed, the above-mentioned inner reinforcement is hoisted to the nuclear reactor during the welding of the above-mentioned cylindrical sleeve It is supported on temporary struts set up on the lower concrete of the sealed enclosure.

Furthermore, in order to solve the above-mentioned problems related to the construction method of the nuclear reactor sealed casing of the present invention, as described in technical solution 17, when a partition layer is provided in the nuclear reactor sealed casing made of reinforced concrete, the above-mentioned partition is formed on the ground in advance. Assemble the sleeve assembly of the partition layer of the first layer to form a disc-shaped overall structure, hoist the sleeve assembly of the partition layer of the overall structure with a crane, and lift it to the construction site. The upper sleeve and the support base of the nuclear reactor sealed casing support and fix the hoisted partition layer sleeve assembly.

Furthermore, in order to solve the above-mentioned problems, the construction method of the nuclear reactor sealed casing of the present invention, as described in technical solution 18, the diaphragm layer sleeve assembly has a diaphragm sleeve, a diaphragm layer reinforcement body, a sealing plate and an inner or The external support structure is pre-assembled on the ground into a disc-shaped integral structure. As described in technical solution 19, the separator layer sleeve assembly has the upper section of the nuclear reactor pressure vessel support base on the inside, and the upper section of the base is placed on the ground in advance. assembled into a whole.

Furthermore, in order to solve the above-mentioned problems, the construction method related to the nuclear reactor sealed casing of the present invention, as described in the technical solution 20, the diaphragm layer sleeve assembly is to pre-install the diaphragm sleeve, the diaphragm layer reinforcement body, and the seal on the ground. The plate and the internal support structure are assembled into a disc-shaped whole. Use a crane to hoist the clapboard layer sleeve assembly of the overall structure and hoist it into the interior. Using the T-shaped sleeve assembly of the original cylindrical part The anchor and the trimmed medium-thick plate fixed on the partition sleeve support the hoisting load of the partition layer sleeve assembly. In addition, as described in the technical solution 21, the separator layer sleeve assembly is formed by assembling the separator sleeve, the separator layer support body, the sealing plate and the external support structure material into a disc-shaped whole on the ground in advance, and a crane is used to Hoist the bulkhead layer sleeve assembly of the overall structure, hoist it into the interior, use the T-shaped holder of the original cylindrical part of the sleeve and the trimmed medium-thick plate to lift the bulkhead layer sleeve assembly input load for support.

Furthermore, in order to solve the above-mentioned problems related to the construction method of the nuclear reactor containment vessel of the present invention, as described in technical solution 22, when the top plate covering the top of the reinforced concrete nuclear reactor containment vessel is provided, the above-mentioned components are placed on the ground in advance. The roof components of the roof are assembled to form the overall structure, and the roof components of the overall structure are hoisted by a crane and hoisted into the construction site. The hoisted roof components are temporarily supported by the cylindrical part of the nuclear reactor sealed casing. It is supported and installed with the shielding wall of the nuclear reactor.

Moreover, in order to solve the above-mentioned problems, the construction method of the nuclear reactor airtight casing of the present invention is related. As described in technical solution 23, the roof assembly has a roof reinforcement body, an internal support structure, a roof sleeve and a roof insertion rib. Assemble it into an integral structure on the ground. As described in technical solution 24, the top plate assembly has a nuclear reactor seal casing lower flange that is pre-assembled on the ground as a whole on the inner peripheral side. In order to prevent the inner circumference of the internal support structure from The innermost reinforcement of the side and the roof reinforcement body collides, and the inner end of each internal support structure member radially arranged in the inner support structure and one of the above-mentioned innermost outer reinforcements are processed, Make it bend. In addition, as described in technical solution 25, when the roof assembly is assembled on the ground, in order to prevent the outermost reinforcement of the roof reinforcement body from colliding with the longitudinal reinforcement of the cylindrical part of the nuclear reactor sealed casing, the outermost reinforcement of the above-mentioned outermost Bending processing is performed to extend radially.

Moreover, in order to solve the above-mentioned problems, the construction method of the nuclear reactor sealed casing of the present invention, as described in technical solution 26, the outermost reinforcement on the inner side and the outermost reinforcement on the outer side are connected to the roof reinforcement body through the reinforcement connecting device. The top plate is perpendicular to the reinforcement, and, as described in technical solution 27, is hoisted to the roof assembly on the top of the sealed casing of the nuclear reactor, the inner end of the material of each internal support structure that constitutes the radial arrangement of the internal support structure can pass through The removed temporary support is supported on the shield wall of the nuclear reactor. The outer end of the above-mentioned internal support structure material is supported by the temporary support set up on the cylindrical part of the nuclear reactor sealed casing. side support.

Furthermore, in order to solve the above-mentioned problems related to the construction method of the nuclear reactor sealed casing of the present invention, as described in technical solution 28, when the cylindrical part sleeve that constitutes the nuclear reactor sealed casing made of reinforced concrete is hoisted to the construction site, the circular The support installed on the sleeve of the cylinder part through the hole and the orifice is switched to the support of the advanced steel frame of the nuclear reactor building. Support through holes and openings.

The effect of the present invention is: in the nuclear reactor sealed casing and the construction method thereof involved in the present invention, the operation in the construction site during the construction of the nuclear reactor sealed casing (RCCV) can be greatly reduced, and the efficiency and efficiency of the RCCV construction operation can be ensured. safety. Furthermore, the process of RCCV construction and construction can be greatly shortened and the construction period can be greatly shortened.

In the nuclear reactor sealed casing and construction method thereof involved in the present invention, since the RCCV inner reinforcement is independently assembled on the ground outside the RCCV sleeve in advance, the RCCV sleeve and the inner reinforcement are hoisted into and installed at the construction site at the same time. The position is specified, so the inner reinforcement work of the RCCV (scaffold installation, reinforcement, and scaffold removal) can be reduced on the construction site, and the process and construction period of the RCCV construction can be greatly shortened.

In the nuclear reactor sealed casing and construction method thereof according to the present invention, the separator layer (DF) sleeve assembly is pre-assembled on the ground with good workability to form an integrated structure, and the integrated structure is hoisted It can be inserted and installed at the specified position on the construction site, so that there is no need to assemble and dismantle the temporary support structures in the construction site to form the partition layer, install the sealing plate, and reinforce the partition layer. While improving workability, it can be Significantly reduce the work on the construction site and shorten the process and construction period of RCCV construction.

In addition, in the nuclear reactor sealed casing and construction method thereof according to the present invention, the top plate assembly is pre-assembled into an integrated structure on the ground with good workability, so that the integrated top plate assembly can be matched to the RCCV cylinder. Since the ribs are hoisted and installed without interference, it is possible to reduce the joint reinforcement work of the fixed part after the roof assembly is hoisted in, and the process of roof construction can be greatly shortened, and the construction period can be shortened.

In addition, in the nuclear reactor sealed casing and construction method thereof according to the present invention, the roof assembly assembled on the ground in advance adopts a structure that prevents the inner end of the built-in support member of the constituent member and the inner periphery of the roof reinforcement body from being damaged. The interference of the outermost reinforcement of the side (ring shape) can support the inner end of the inner support member on the nuclear reactor shielding wall, and does not need the supporting bracket on the periphery of the nuclear reactor shielding wall, which greatly reduces the installation and withdrawal of the bracket Operation, improve the operation efficiency of the construction site, and greatly shorten the construction period.

In addition, in the nuclear reactor sealed casing and its construction method involved in the present invention, after the RCCV sleeve is hoisted into the specified position on the construction site, the through-members and cabins installed on the RCCV sleeve are supported by the advanced steel frame of the nuclear reactor building. In this way, the interference with the RCCV reinforcement operation on the construction site can be effectively and effectively prevented, the interlacing of construction operations can be reduced, and the efficiency of construction operations can be improved.

Description of drawings

Fig. 1 is equipped with the longitudinal sectional view of the nuclear reactor building of nuclear reactor sealing shell of the present invention.

Fig. 2 is a perspective view showing the arrangement relationship between the RCCV sleeve and the inner reinforcement of the RCCV constituting the cylindrical part of the sealed casing of the nuclear reactor of the present invention.

Fig. 3 is a partial longitudinal sectional view showing an assembly example of an RCCV sleeve and an RCCV inner reinforcement assembled on the ground near a construction site.

Figure 4 (A) and (B) show the installation example of the RCCV sleeve and the inner reinforcement of the RCCV hoisted into the construction site, and show the cross-sectional view of the connection between the inner reinforcement of the RCCV and the insertion reinforcement of the base.

Fig. 5 is a cross-sectional view showing the shape of the RCCV sleeve when the dry well sleeve and the inner reinforcement are hoisted in at the construction site.

Fig. 6 is a perspective view of a state in which the separator layer (DF) sleeve assembly provided in the sealed casing of the nuclear reactor of the present invention is pre-assembled into an integrated structure.

Figure 7(A) shows the state in which the integrated structure DF sleeve assembly is hoisted into the construction site;

(B) shows an enlarged cross-sectional view of part A of FIG. 7(A).

Fig. 8 (A) shows the modified example of the DF sleeve assembly installed in the nuclear reactor sealing shell of the present invention;

(B) shows an enlarged cross-sectional view of part B in FIG. 8(A).

Fig. 9 shows a perspective view of the state in which the RCCV top plate assembly covering the top of the sealed nuclear reactor enclosure of the present invention is pre-assembled on the ground into an integrated structure.

Fig. 10 (A) represents the partial plan view of roof assembly shown in Fig. 9;

(B) represents the enlarged plan view of part B of Fig. 10 (A);

(C) shows an enlarged plan view of part C in FIG. 10(A).

Fig. 11 represents the sectional view of the RCCV roof assembly of Fig. 9.

Fig. 12 shows a modified example of the top plate assembly covering the top of the nuclear reactor sealed casing of the present invention, an enlarged plan view of the end of the nuclear reactor shielding wall of the RCCV top plate assembly.

Fig. 13 is a cross-sectional view showing a state in which the penetration member and the opening mounted on the RCCV sleeve of the sealed casing of the nuclear reactor of the present invention are supported from the preceding steel frame.

Fig. 14 is a side view along line XIV-XIV of Fig. 13 .

Fig. 15 (A)-(H) schematically represents the process diagram of the construction steps of the sealed casing of the nuclear reactor related to the present invention.

Fig. 16 shows a cross-sectional view of the structure of a conventional nuclear reactor containment vessel (RCCV).

Fig. 17 is a cross-sectional view showing construction of a conventional RCCV cylindrical portion at a construction site of a nuclear reactor building.

Fig. 18 shows a cross-sectional view of installation and construction of a conventional RCCV partition layer.

Fig. 19 shows a sectional view of a conventional RCCV roof installation construction.

Detailed ways

Hereinafter, an embodiment of the reinforced concrete nuclear reactor containment envelope and its construction method according to the present invention will be described with reference to the drawings.

1 is an overall cross-sectional view showing an outline of a nuclear reactor building 1 of an ABWR nuclear power plant having a nuclear reactor sealed casing according to the present invention.

A nuclear reactor building 1 houses a nuclear reactor containment vessel (RCCV) 2 made of reinforced concrete, and a nuclear reactor pressure vessel 3 is placed in the nuclear reactor containment vessel 2 . The nuclear reactor pressure vessel 3 is supported by a nuclear reactor sealed vessel support base (RPV support base) 5 set up on the base pad 4 of the nuclear reactor building. The nuclear reactor pressure vessel 3 is supported by a nuclear reactor shield wall 40 extending upward from the RPV support base 5 . The nuclear reactor pressure vessel 3 is surrounded by a nuclear reactor shielding wall 40 extending upward from the RPV support base 5 , and the nuclear reactor shielding wall 40 shields radiation from the nuclear reactor.

Furthermore, the nuclear reactor sealed casing (RCCV) 2 is a container of reinforced concrete, and its constituent parts include: a cylindrical or sleeve-shaped cylindrical wall 6 set up on the bottom pad 4 of the nuclear reactor building, and the cylindrical wall 6 A partition layer 8 that divides the interior into upper and lower chambers, and an upper floor 7 called a ceiling for covering the top of the above-mentioned cylindrical wall 6 . The interior of RCCV2 is divided into a lower pressure suppression chamber 25 and an upper dry well 28 by a partition layer 8 . In the pressure suppression chamber 25, suppression pool water is stored as cooling water.

When building RCCV2, the RCCV steel sleeve 10 is a cylinder part sleeve, which is prefabricated on the ground near the factory or construction site in advance, and the ring-shaped or semi-circular convex sleeve parts are stacked to form a circle. Cylindrical or sleeve-shaped. The RCCV10 consists of a pressure containment chamber sleeve or a dry well sleeve.

Fig. 2 shows the state that the inner reinforcement 11 of the RCCV is arranged independently on the outer peripheral side of the steel sleeve 10 of the cylindrical part of the RCCV2 on the ground near the factory or the construction site, for example, on the storage yard platform, and assembled. After making the ring-shaped sleeve part of the RCCV sleeve 10 into a cylindrical shape or a sleeve shape, the RCCV inner reinforcement is carried out on the outer peripheral side of the RCCV sleeve 10 on the ground near the factory or the construction site, for example, on the storage yard platform. 11 assembly (site assembly). The code number 50 is a through-piece for pipes, cables, instrument pipes, etc. Code number 51 is installed on the RCCV sleeve 10 to transport the machine access port, and code number 52 is the access port for operators.

(1) Cylindrical wall structure of nuclear reactor containment vessel (RCCV)

When describing the cylindrical wall structure of the RCCV, the assembly (site assembly) of the RCCV inner reinforcement 11 will be described based on FIG. 3 .

Fig. 3 is a partial vertical section when the RCCV inner reinforcement 11 is assembled (site assembly) on the ground in the factory or near the construction site, for example, on the storage yard platform, on the outer peripheral side of the RCCV sleeve 10 shown in Fig. 2 picture. The inner reinforcement 11 of the RCCV is cylindrical reinforcement 59, 60, 61. For example, longitudinal reinforcement 57 and transverse reinforcement 58 with a diameter of about 50mmφ are respectively arranged in the vertical and horizontal directions, and assembled into a cylindrical shape or a sleeve shape. , There are many groups of reinforcing bars for the cylindrical body, for example, three groups of 59, 60, 61 are arranged together in a concentric garden shape to form an inner reinforcing component.

Initially, at the outer peripheral portion of the RCCV sleeve 10 assembled into a garden ring or sleeve shape with prefabricated parts, a scaffold 54 for operation is erected along the circumference of the garden, and a stepped skeleton 55 is installed inside the scaffold 54, Used to support the inner reinforcement 11 of the RCCV. The skeleton 55 and the scaffolding 54 are assembled in the factory or on the ground near the construction site, and are built into a garden ring shape or a sleeve shape. The annular or sleeve-shaped RCCV sleeve 10 is prefabricated in the factory or on the ground near the construction site, for example, on the storage yard platform, and is supported by the sleeve support 56 . On the RCCV sleeve 10, a plurality of (for example 20) T-shaped fixtures 13 are fixed at regular intervals along the circumferential direction on the outer peripheral side, and its effect is to be anchored in the concrete. The T-shaped holder 13 extends along almost the entire length of the RCCV sleeve 10 in the axial direction, and is used to reinforce the RCCV sleeve 10 .

The assembling reinforcement operation of the RCCV inner reinforcement 11 on the outside of the RCCV sleeve 10 is carried out in the following manner. For the inner reinforcement 11 of the RCCV, the innermost (row 1, section 1) longitudinal reinforcement 57 is first arranged, and the longitudinal reinforcement 57 is installed on the longitudinal reinforcement 57 sequentially from the outside along the circumference of the garden. Ribs 57, 58 are assembled into a cylindrical frame structure. The load of the innermost longitudinal and transverse reinforcements 57 and 58 is supported by the first section of the stepped skeleton 55 . It is also possible to arrange the longitudinal reinforcement 57 to the outside and transfer the transverse reinforcement 58 to the inside. The loads of the longitudinal and transverse reinforcements 57, 58 are supported by the stepped frame 55 and are not attached to the RCCV sleeve 10.

By means of the innermost (first stage) longitudinal and transverse reinforcements 57, 58, the first row of cylindrical body reinforcements 59 constitutes a frame structure, and the outermost of the first row of cylindrical body reinforcements 59 Arrange and assemble the second and third columns of cylindrical body reinforcements 60, 61. The second column and the third column of cylindrical body reinforcement 60, 61 also arrange and assemble the longitudinal reinforcement 57 and horizontal reinforcement 58 like the first column of cylindrical body reinforcement 59, so as to form an integration, constitute an independent frame structure.

Each row of cylindrical body reinforcements 59 , 60 , 61 is supported by each step of the stepped framework 55 . The frame 55 rises from the first step to n steps outward in the radial direction, for example, the third step, and forms a stepped shape. The frame 55 supports the innermost (row 1) longitudinal reinforcement 57 in the lowest position in order to facilitate mutual tension between the inner reinforcement 11 of the RCCV and the bottom pad insertion reinforcement 63 as the rising reinforcement on the construction site. . Skeleton 55 also can constitute ring shape or half garden shape, so that the outer peripheral side of the RCCV sleeve 10 that is provided with on the sleeve supporting table 56 is surrounded, also can be constituted like this, promptly arranges many at appropriate intervals on the circumferential direction. A skeleton 55 makes the whole be arranged in a ring shape or a semi-garden shape.

Through the reinforcement operation of the inner reinforcement 11 of the RCCV, the cylindrical body reinforcements 59, 60, 61 of each row are assembled into an independent frame structure, and the load of the cylindrical body reinforcements 59, 60, 61 of each row is not allowed. Act on the RCCV sleeve 10. The load of the inner reinforcement 11 of the RCCV is not allowed to act on the RCCV sleeve 10 because the load of the inner reinforcement is very large, and the thickness 10 of the RCCV sleeve is very thin, such as 6.4mm, and its rigidity is very small. If the inner reinforcement load is applied to the RCCV sleeve 10 as a load with a moment, the RCCV sleeve 10 and the T-shaped anchor member 13 as the sleeve axial constituent material may be buckled (bent longitudinally). However, this buckling can be prevented by not allowing the load of the inner reinforcement to act on it.

When the RCCV inner reinforcement 11 is arranged on the outer peripheral side of the RCCV sleeve 10, when the installation and assembly of the RCCV inner reinforcement 11 is completed, the RCCV sleeve 10 and the RCCV inner reinforcement 11 are hoisted into the construction site. The method of hoisting in is to manipulate the crane 65 to make the lifting auxiliary hook beam 66 lift and move. Utilize this lifting auxiliary hook beam 66 to simultaneously independently lift, move and drop the RCCV sleeve 10 and the RCCV inner reinforcement 11 independently, so that they can be hoisted in and moved into the construction site. The crane is, for example, a large crane capable of lifting 1,000 tons.

4 is a cross-sectional view showing a state in which the pressure suppression chamber 16 and the RCCV inner reinforcement 11 as the first-stage cylindrical partial sleeve of the RCCV sleeve 10 are hoisted and placed on the base pad 4 of the nuclear reactor building.

On the base pad 4 of the nuclear reactor building, inserting ribs 63 of the inner base pad connected with the inner reinforcement bars 11 of the RCCV are implanted. The bottom pad inserting reinforcement 63 of the RCCV inner reinforcement 11 has a diameter of about 50mmφ, and the first row of longitudinal reinforcement 67 inside it is longer, and the longitudinal reinforcement 67 is in the order of the first row, the second row, and the third row. Arranged outside, its length is shortened successively, forming a ladder shape. Code number 68 is the transverse reinforcement of the bottom pad insert rib 63.

Contrary to the above, each row of longitudinal reinforcements 57, 57, 57 of the RCCV inner reinforcement 11 hoisted to the construction site is set in such a state by means of the stepped shape of the skeleton 55 that the innermost first The longitudinal reinforcement 57 in the first row is relatively long, and the second row and the third row are gradually shortened to the outside in turn.

Then, as shown in FIG. 4 , the RCCV inner bottom pad insertion rib 63 from the nuclear reactor building bottom pad 4 and the RCCV inner side reinforcement 11 are connected together to make them mutually tensioned by using mutual tension reinforcement 70 .

As shown in FIG. 4(A), first, the mutual tension reinforcement 70 is provided on the innermost first row (first stage). The first row of mutual tension reinforcement 70 is formed by assembling the longitudinal reinforcement 71 and the transverse reinforcement 72 together. Initially insert the first row of longitudinal reinforcement 71, the length of which is equivalent to the distance between the bottom pad insertion rib 63 on the nuclear reactor building bottom pad 4 and the RCCV inner reinforcement 11 that has been dropped, and is used as a reinforcement The reinforcement connector 73 of the connecting device sequentially connects the inserting reinforcement 63 of the inner bottom pad of the RCCV and the longitudinal reinforcement 57 and 67 of the inner reinforcement 11 of the RCCV through a mechanical connection method or a grouting connection method. The longitudinal reinforcement 71 of the mutual tension reinforcement 70 is used to sequentially connect the RCCV inner bottom pad insert 63 and the RCCV inner reinforcement 11 in the reinforcement connector 73, and the connection becomes a mutual tension (interconnection) part. After using the longitudinal reinforcement 71 of the first row of mutual tension reinforcement 70 and the reinforcement coupler 73 to connect the RCCV inner bottom pad insertion reinforcement 63 and the first row of longitudinal reinforcement of the RCCV inner reinforcement 63, the transverse The reinforcement 72 is installed on the longitudinal reinforcement 71 of the inter-tension reinforcement 70 to form an integration, and the inter-tension reinforcement 70 is assembled.

After connecting the first row of RCCV inner bottom pad inserting ribs 63 and RCCV inner reinforcement 11 by using the first row of mutual tension reinforcement 70, use the same connection procedure as that of the first row to install the second and third rows The inter-tension reinforcements 70 and 70 of each row are used to connect the RCCV inner bottom mat inserting reinforcement 63 and the RCCV inner reinforcement 11 in sequence by using each inter-tension reinforcement 70 of each row.

The mutual tension reinforcement 70, 70, 70 of the mutual tension part gradually expands from the first row to the outer side (outward in the radial direction) to the second row and the third row. Therefore, the longitudinal reinforcement 71 of the mutual tension reinforcement 70 of each row Insertion, fastening with reinforcement coupler 73 or pouring of grout and installation of transverse reinforcement 72 can be carried out smoothly and easily without affecting other columns.

Furthermore, utilize the crane 65 to hang the RCCV sleeve 10 and the RCCV inner reinforcement 11 and place them on the bottom pad 4 of the nuclear reactor building, then, the RCCV inner reinforcement 11 is hoisted by means of the lifting auxiliary hook beam 66 of the crane 65 In the hoisting state, the insertion rib 63 of the inner bottom pad of the RCCV and the inner reinforcement 11 of the RCCV are interconnected and pulled together.

Utilize mutual pull reinforcement 70 to come that RCCV inner reinforcement 11 is connected on the RCCV inner bottom pad insertion rib 63 from nuclear reactor building bottom pad 4, after the interconnection and mutual tension process finishes, in the outside of RCCV inner reinforcement 11 The scaffolding 75 for the installation of the RCCV outer reinforcement 12 is built, and the RCCV outer reinforcement operation is started.

RCCV outer reinforcement 12 uses scaffolding 75 for work on the outer side of RCCV inner reinforcement 11, and is arranged in the same way as RCCV inner reinforcement 11, and is assembled into a cylindrical shape with longitudinal reinforcement 76 and transverse reinforcement 77 at the construction site Body reinforcement 79,80,81 is arranged into a concentric garden shape, so the reinforcement operation of the RCCV outer reinforcement 12 is completed. In addition, the outer reinforcement of the RCCV can also be pre-installed on the ground as a whole, hoisted into the construction site by a crane 65, and placed outside the inner reinforcement 11 of the RCCV for installation.

After the RCCV outer reinforcement work is finished, the outer formwork frame 82 is installed outside the RCCV outer reinforcement 12, pouring cement in the space surrounded by the outer formwork frame 82 and the pressure suppression chamber sleeve 16 of the RCCV sleeve 10. At this time, the RCCV sleeve 10 constitutes the inner formwork frame with the pressure suppression chamber sleeve 16 as a cylindrical partial sleeve. After the cement is poured, the pressure suppression chamber sleeve 16 is assisted by the T-shaped fixture 13 and integrated with the RCCV inner reinforcement 11 and the RCCV outer reinforcement 12 to be reinforced.

Furthermore, in parallel with the reinforcement operation of the RCCV outer reinforcement 12 and the concrete pouring operation, the nuclear reactor pressure vessel support base 5 is set on the nuclear reactor building bottom pad 4 of the nuclear reactor building 1 . The support base 5 is at least divided into an upper base section 5a and a lower section 5b on the ground (on the platform) near the factory or the construction site for site assembly, and then moved into the nuclear reactor building 1 for installation and fixation.

As shown in FIG. 6 , the base upper section 5 a is assembled into a whole together with a diaphragm layer sleeve assembly (hereinafter referred to as DF sleeve assembly) 85 . The DF sleeve assembly 85 is assembled as a whole by the disk-shaped diaphragm layer reinforcement body 86 constituting the diaphragm layer 8 , the sealing plate 30 , the internal support structure 87 and the diaphragm sleeve 17 to form an integrated structural member. The DF sleeve assembly 85 is arranged and installed on the lower base section 5 b and the pressure suppression chamber sleeve 16 of the RCCV sleeve 10 . The DF sleeve assembly 85 has an integrated base upper section 5 a on the inner peripheral side, and the base upper section 5 a is arranged on the lower section 5 b of the RPV support base 5 . The internal support structure 87 is formed by arranging many internal support structure materials 88 as strength members in a radial shape, and the DF reinforcement body 86 is formed by combining radial reinforcement 89a and circumferential reinforcement 89b. .

The DF sleeve assembly 85 provided on the pressure suppression chamber sleeve 16 is fixed by welding the diaphragm sleeve 17 around the circumference, and the diaphragm sleeve 17 is welded and fixed as the second stage sleeve 10 of the RCCV. Dry well sleeve 27. The dry well sleeve 27 is welded and fixed to the bulkhead sleeve 17 of the DF sleeve assembly 85 from the inner peripheral side and the outer peripheral side along the entire circumference.

As the cylindrical part of the sleeve 10 of the RCCV second stage sleeve, that is, the dry well sleeve 27, and the dry well inner reinforcement 90 as the inner upper reinforcement of the RCCV on the outer side of the sleeve, its structure is the same as that shown in Figure 1 and Figure 2 The RCCV sleeve 10 shown is the same as the RCCV inner reinforcement 11 . As shown in Fig. 1 and Fig. 2, it is assembled on the ground (storage yard platform) in the factory or near the construction site. The assembled dry well sleeve 27 and the internal reinforcement 90 of the dry well are hoisted by the lifting auxiliary hook beam 66 of the crane 65 shown in Fig. The hook beam 66 keeps it hoisted, and the dry well sleeve 27 is welded to the bulkhead sleeve 17 along the entire circumference.

The dry well sleeve 27 is welded to the partition sleeve 17 along the periphery. According to the legal regulations on atomic energy, it should be carried out from both the inner peripheral side and the outer peripheral side, but no matter which side it only has, there is enough welding. strength. Before the welding operation of the dry well sleeve 27 is completed, the mutual tension connection operation of the RCCV reinforcement that rises below the partition layer 8 cannot be carried out. Because the welding of the dry well sleeve 27 and the mutual tension connection of the inner reinforcement 90 of the dry well take several ten days, it is actually impossible to keep the inner reinforcement 90 of the dry well in the hoisted state for several ten days by using the crane 65 time.

Therefore, as shown in FIG. 5 , a temporary support 91 is prepared, and the dry well side reinforcement 90 is hoisted using this temporary support 91 instead of a crane. The transfer of the hoisting to the temporary support 91 is to immediately change the inner reinforcement 90 of the dry well to be hoisted by the temporary support 91 after the dry well sleeve 27 and the internal reinforcement 90 of the dry well as the upper reinforcement of the RCCV are lowered. .

Temporary pillars 91 are set up on the concrete surface between the RCCV inner reinforcement 11 and outer reinforcement 12 that have been constructed below the partition layer 8 . A plurality of temporary pillars 91 are set up at appropriate intervals in the circumferential direction, for example, 20 pieces are set up. The location of the temporary pillar 91 cannot affect the welding operation of the dry well sleeve 27 hoisted by the lifting cantilever 92 on the top and the mutual pull connection operation of the reinforcement 90 inside the dry well.

After the welding operation of the dry well sleeve 27 is completed, the inner reinforcement 90 of the dry well as the upper reinforcement of the RCCV and the lower reinforcement 11 of the original RCCV inner reinforcement as the inner reinforcement of the RCCV are connected to each other. In this case, the mutual tension connection reinforcement is formed into a stepped shape like the mutual tension connection reinforcement 70 shown in FIG. Mutual pull connection operation of rib 11 is the same. After the inter-tensioning connection reinforcement operation of the inner reinforcement 90 of the dry well is completed, a scaffold (shown at the end) for operation between the outer reinforcement 93 of the dry well as the outer upper reinforcement of the RCCV is built. The scaffolding for this work is erected, and the RCCV outer reinforcement work is started, and the dry well outer reinforcement 93 is installed on the outer peripheral side of the dry well inner reinforcement 90 . At this time, the temporary support 91 is removed before the external reinforcement of the RCCV, but if it does not affect the external reinforcement, it can be preserved as it is and embedded in concrete.

In this way, as shown in Figures 2 to 5, the RCCV inner reinforcement 11 is assembled on the outside of the RCCV sleeve 10 in advance in the factory or on the ground (on the storage yard platform) near the construction site to make an integrated structure, and the assembly The RCCV sleeve 10 (including the dry well sleeve 27) and its inner reinforcement 11 (including the inner reinforcement 90 of the dry well) are hoisted simultaneously at the same time, and are hoisted into the construction site for installation. The installation method of the RCCV sleeve 10 and the RCCV inner reinforcement 11 can be hoisted into the RCCV inner reinforcement 11 without buckling the RCCV sleeve 10 . Therefore, it is possible to omit the construction of the scaffold for the RCCV inner reinforcement work and the RCCV inner reinforcement work in the construction site, and accordingly, the construction period can be greatly shortened.

Furthermore, the RCCV inner reinforcement 11 of hoisting and the RCCV inner reinforcement 11 in the construction site (when the pressure suppression chamber sleeve 16 is the insertion rib 63, when the dry well sleeve 27 is constructed to the bottom of the partition layer 8 The inter-tension connection shape of the RCCV inner reinforcement 11) is that the length of each segment is different, gradually expanding, and the connection is performed by mechanical or grouting methods, so the inter-tension connection and reinforcement operation can be easily performed.

In addition, the dry well sleeve 27 and the dry well inner reinforcement 90 as the inner upper reinforcement of the RCCV are hoisted to the construction site, and the RCCV inner upper reinforcement 90 hoisted in from the lower part during the welding of the dry well sleeve 27 Temporary pillars 91 are set up on the RCCV reinforced concrete section for support. In this way, after the temporary support 91 is used instead to hoist the upper reinforcement 90 inside the RCCV that has been hoisted in, the crane 65 can be withdrawn immediately. Moreover, the welding of the dry well sleeve 27 and the inter-tensioning connection operation of the reinforcement can be carried out, and the upper reinforcement 90 inside the RCCV that has been hoisted in is not affected.

(2) The support structure of the RCCV diaphragm part

Figures 6 and 7 show the bulkhead layer sleeve assembly (DF sleeve assembly) 85 forming part of the RCCV bulkhead. The DF sleeve assembly 85 is assembled in a factory or on the ground near a construction site, such as a storage yard platform. There are many kinds of storage yard platforms, such as the platform for the sleeve assembly 85 of the diaphragm layer, the platform for the RCCV sleeve 10 and the inner reinforcement 11 of the RCCV, and the platform for the support base 5 of the nuclear reactor pressure vessel.

The DF sleeve assembly 85 is made by assembling the partition plate 17, the reinforcement body 86 of the partition layer, the sealing plate 30 and the internal support structure 87 into an integrated structure. As shown in Fig. 6 and Fig. 7, the reinforcement body 86 of the partition layer combines the radial reinforcement 89a and the peripheral reinforcement 89b together, and the nuclear reactor sealed casing (RPV) is arranged on the inner peripheral side of the reinforcement body 86 of the partition layer. The lower section 5a of the base 5 is supported and integrated.

The upper section 5a of the RPV support base 5 is provided on the cylindrical base lower section 5b, and an outer peripheral support step 95 is formed between the lower base section 5b and the base section 5b. The inner peripheral portion of the DF sleeve assembly 85 is supported by the support step 95 .

On the outer peripheral support step 95 of the RPV support base 5, a removable temporary support 96 is set up as a temporary support device. The temporary support 96 is provided on the RPV support base 5 to support the inner end of the inner support structure 87 of the DF sleeve assembly 85 . The internal support structure 87 is formed by arranging a plurality of internal support structure materials 88 in a radial shape. get braced. The shear stiffening plate 98 of the partition sleeve 17 passes through the sleeve radially and protrudes to both sides to form the inner side 97 of the shear stiffening plate and the outer side 99 of the shear stiffening plate. Between the outer side 99 of the shear stiffening plate of the partition sleeve 17 and the T-shaped fixture 13 of the sleeve 16 of the pressure suppression chamber, a temporary supporting device 100 such as a temporary material or a jack is inserted to prevent the shear stiffening plate 98 and the partition The plate sleeve 17 deforms and bends.

On the other hand, the internal support structure material 88 of the DF sleeve assembly 85 is formed of steel such as H-shaped or I-shaped steel, and the sealing plate 30 made of steel plate is suspended from the bottom of the reinforcement body 86 of the partition layer. , to support the entire load of the RCCV diaphragm part. When hoisting the DF sleeve assembly, use the crane 65 to hoist the internal support structure 87, and hoist the RCCV partition part into the construction site.

Fig. 7 (A) and (B) are partial sectional views of lifting and transporting the RCCV bulkhead to the construction site. The DF sleeve assembly 85 assembled into an integral structure on site on the ground, the pressure suppression chamber sleeve 16 and the RPV support base 5 are hoisted to a specified position, for example, below the DF sleeve assembly 85 at the stage of completion of installation. When the DF sleeve assembly 85 is hoisted, the internal support structure 87 of the DF sleeve assembly 85 is carried for hoisting, and the RCCV partition is partially hoisted into the construction site.

The DF sleeve assembly 85 hoisted into the construction site supports the internal support structure material 88 from the side of the RPV support base 5 through the temporary support 96, and the internal support structure material 88 is connected to the inner side of the shear stiffening plate. 96 to support one side of the partition sleeve 17.

Utilizing the support structure of the RCCV partition plate portion, the load of the integrated structural member DF sleeve assembly 85 can be vertically transmitted to the pressure suppression chamber sleeve 16 . For example, mounting the inner brackets to the pressure containment chamber sleeve 16 creates temporary struts on which the RCCV bulkhead portion is supported, the moment load of the RCCV bulkhead portion is large. Compared with this, since the RCCV sleeve 10 itself is very thin, the rigidity is small. Therefore, it is possible to make the RCCV sleeve 10 and the T-shaped holder as its axial structural material bear the large moment load of the RCCV diaphragm part. 13 were buckled. However, the load supporting structure of the RCCV partition shown in Figure 7 (A) and (B) transmits the load of the partition to the pressure suppression chamber sleeve 16 vertically, so it can effectively prevent the RCCV sleeve from 10 and T-shaped holder 13 are buckled and deformed.

After the RCCV diaphragm part is supported by the RPV support base 5 and the pressure suppression chamber sleeve 16 of the RCCV sleeve 10, the pressure suppression chamber sleeve 16 and the diaphragm sleeve 17 are welded. The welding of the diaphragm sleeve 17 is initially carried out from the inner side. After the inner side is welded, the load of the RCCV diaphragm part can be transmitted vertically to the pressure suppression chamber sleeve 16 through the diaphragm sleeve 17. Then, the pressure suppression chamber sleeve 16 The temporary setting material inserted between the T-shaped fixture 13 and the shear stiffening plate 98 of the partition sleeve 17 or the jack etc. are taken off, and the outer side welding is carried out along the entire garden circumference.

In the support structure of the RCCV partition shown in Figures 6 and 7, the partition sleeve 17, the reinforcement body 86 of the partition layer, the sealing plate 30 and the internal support structure 87 are assembled on the ground into an integrated structure The assembly structure of the parts, the DF sleeve assembly 85 is assembled on the construction site. The DF sleeve assembly 85 assembled on the construction site is about 1,000 tons, and the integrated structural parts are hoisted directly to the construction site by using a large crane 65 .

The DF sleeve assembly 85 , its hoisting load is supported by the T-shaped fixture 13 of the pressure suppression chamber sleeve 16 and the shear stiffening plate 98 . With this supporting structure, the load of the DF sleeve assembly 85 can act on the pressure suppression chamber 16 in the vertical direction, and the integrated structure can be hoisted directly without buckling the pressure suppression chamber sleeve 16 . The assembly work of the RCCV bulkhead part in the construction site with poor working environment conditions can be omitted, and the construction period can be greatly shortened. And the code number 101 is a reinforcement connector as a reinforcement mechanism, which fixes the radial reinforcement 89A of the reinforcement body 86 of the partition layer on the casing 17 of the partition.

After the DF sleeve assembly 85 is hoisted, the concrete pouring work is implemented to complete the partition layer 8 . After the poured concrete has developed strength, the internal components are moved into the upper dry well 28 while the DF temporary support 96 is removed.

When the installation of the internal structure of the dry well 28 is completed and the concrete pouring of the cylindrical part 6 of the RCCV2 reaches the stage near the top, as shown in FIGS. 9 and 10 , the construction of the RCCV roof starts. The roof 7 has a roof assembly 104 , and the roof assembly 104 is integrally installed by a steel plate roof liner 37 , an RCCV inner flange 38 , a roof reinforcement body 102 , and an inner support member 103 . The top plate 7 forms a structure that is cantilevered by the RCCV cylindrical portion 6 .

Before the roof 7 is constructed, a nuclear reactor shielding wall 40 is installed in the upper dry well 28 .

(3) Modification of the supporting structure of the RCCV bulkhead

8(A) and (B) show modified examples of the supporting structure of the RCCV diaphragm portion. The support structure of the RCCV bulkhead part employs an external support member instead of an internal support member of the RCCV bulkhead part.

The RCCV bulkhead unit is pre-assembled to the bulkhead layer sleeve assembly (DF sleeve assembly) 85A at the factory or on the ground near the construction site, for example, on the storage yard platform. The DF sleeve assembly 85A is an assembly structure in which the partition sleeve 17, the reinforcement body 86 of the partition layer, the sealing plate 30 and the external support member 105 are installed on the ground as an integral structure. The partition layer reinforcement body 86 is assembled into a disc shape by radial reinforcement 89a and circumferential reinforcement 89b to form a multi-layer structure.

字形，而被加固。The outer end of the radial reinforcement 89a of the partition layer reinforcement body 86 is connected to the ring-shaped or sleeve-shaped partition sleeve 17 through the reinforcement coupler 101 as a reinforcement installation mechanism to form an integration. The inner ends of the uppermost and lowermost radial reinforcements 89 a in the reinforcement body 86 of the partition layer are connected to each other to form

The font is reinforced.

A seal plate 30 made of steel plate is attached below the separator layer reinforcement body 86 on the disk, and the seal plate 30 is supported on the upper surface of the outer support member 105 . The outer support member 105 has a plurality of outer support members 106 arranged radially, and the members 106 are formed of H-shaped steel, I-shaped steel, or the like. The outer end of the external support member 105 is connected to the partition sleeve 17 by a connection mechanism such as a gusset plate 107, and its inner end can support the mounting bracket 108 protruding from the upper peripheral portion of the nuclear reactor pressure vessel support base 5 superior.

On the inner peripheral side of the DF sleeve assembly 85A, the upper base section 5a of the nuclear reactor pressure vessel support base 5 is integrated, and the upper base section 5a is arranged on the lower base section 5b to form the nuclear reactor pressure vessel support base 5 .

The DF sleeve assembly 85A is assembled into a disc-shaped integral structure on the ground near a factory or construction site with a good working environment. The DF sleeve assembly 85A assembled on site weighs about 1,000 tons, for example, and is hoisted by the lifting auxiliary hook beam 66 of the large crane 65 and moved into the construction site. 8(A) and (B) are cross-sectional views of the DF sleeve assembly 85A being hoisted and unloaded in the construction site. The DF sleeve assembly 85A is hoisted into the construction site after the external support member 106 is hoisted. The upper surface of the outer support member 106 supports the seal plate 30 such that it supports the entire weight of the RCCV bulkhead section.

After hoisting the external supporting member 106, hoisting and unloading the DF sleeve assembly 85A in the construction site, one side of the RPV supporting base 5 is supported on the mounting bracket 108 protruding from the outer periphery of the base, and the partition sleeve 17- The side is above a pressure-relief chamber sleeve 16 reinforced with a T-section member 13 , supported by a bulkhead sleeve 17 .

As shown in the enlarged view of FIG. 8(B) on one side of the partition sleeve 17, a shear stiffening plate 98 is provided on the annular or sleeve-shaped partition sleeve 17 for reinforcement. A temporary supporting mechanism 100 such as a temporary member or a jack is inserted between the outer side 99 of the shear stiffening plate of the partition sleeve 17 and the T-shaped section member 13 of the pressure suppression chamber sleeve 16 . The bulkhead sleeve 17 is temporarily supported on the T-section member 13 by means of a shear stiffener 98 .

At this time, the outer end of the outer support member 106 is connected to the partition sleeve 17 through the gusset plate 107 to form an integral body. Therefore, when the outer peripheral side of the hoisted DF sleeve assembly 85A is hoisted by the crane 65, it can be temporarily supported on On the pressure suppression chamber sleeve 16.

The DF sleeve assembly 85A welds the entire circumference of the partition sleeve 17 to the pressure suppression chamber sleeve 16 in a state where it is temporarily supported on the pressure suppression chamber sleeve 16 . First, the diaphragm sleeve 17 is welded on the pressure suppression chamber sleeve 16 from the inner side. After the inner side welding is completed, the load of the RCCV diaphragm part is vertically transmitted to the pressure suppression chamber sleeve 16 through the diaphragm sleeve 17 . After the load of the RCCV partition can be transmitted vertically, the temporary member or temporary support mechanism 100 such as a jack temporarily installed on the T-shaped section member 13 of the pressure suppression chamber sleeve 16 is removed and removed. After being withdrawn, the diaphragm casing 17 and the pressure suppression chamber sleeve 16 are welded from the outside, so that the DF sleeve assembly 85A is supported and installed on the support base 5 of the nuclear reactor pressure vessel and the pressure suppression chamber sleeve 16 .

After the DF sleeve unit 85A is installed at a predetermined position, concrete is poured on the DF sleeve unit 85A to form the RCCV bulkhead portion.

The support mechanism of the RCCV partition shown in this modified example has the same effect as the support structure of the RCCV partition shown in FIG. 6 and FIG. 7, and the DF sleeve assembly 85A can be vertically supported in the pressure suppression chamber On the sleeve 16, the pressure suppression chamber sleeve 16 can be suspended without longitudinal bending or deformation. It is possible to avoid the assembly work of the RCCV bulkhead portion at the construction site where the working environment is harsh, and the construction method can be significantly shortened.

(4) The top plate of the sealed casing of the nuclear reactor

The top plate assembly 104 arranged on the top of the cylindrical wall 6 of the nuclear reactor sealed casing (RCCV) 2 is constituted as shown in FIG. Roof assembly 104 is as shown in Figure 9, is the roof liner 37 that ring-shaped or sleeve-shaped RCCV lower flange 38, disc-shaped steel plate are made, is the same disc-shaped roof reinforcement body 102, the top of the roof The framework inserts the steel bars 110 and the internal support members 103 to form an integral disc-shaped structure.

As shown in Figure 9, Figure 10 and Figure 11, the internal support member 103 is composed of a plurality of internal support members 111 arranged radially for structural steel such as H-shaped steel or I-shaped steel, and each internal support member 111 is The inner side of the RCCV is combined with the flange 38 at the bottom of the RCCV to form an integrated structure.

RCCV lower flange 38, as shown in Figure 11, is arranged on the top of the nuclear reactor shielding wall 40 and can be removed above the temporary support 112 as a temporary support mechanism, and the lower peripheral flange portion 38a of the RCCV lower flange 38 is welded on The inner peripheral side of the ceiling liner 37 made of a steel plate is fixed integrally. A plurality of struts 113 are erected along the circumferential direction on the inner peripheral end of the roof liner 37 or the lower peripheral flange 38a of the RCCV lower flange 38, and the inner end of the inner support member 111 is supported by the struts 113.

The inner supporting member 111 extends the outer end radially to the RCCV cylindrical portion (cylindrical wall) 6 , and at the same time supports the roof liner 37 in a hanging manner. The built-in support member 111 is a member that supports the full load of the roof. As shown in FIG. 9 , the internal support members 111 arranged radially can also be connected with each other by concentric circular reinforcement 114 to improve physical and mechanical strength. The circumferential reinforcement 114 is arranged along the circumferential direction, and assembles each interior supporting member 111 into a spider web.

的顶板直交配筋构成，纵向和横向配筋垂直交叉安装。顶板配筋体102也可以不用的纵向和横向配筋而采用辐射配筋和圆周配筋交叉构成。顶板配筋体102将多层结构，例如3层结构的顶板直交配筋，设置在内装支撑构件111的上下两侧。Roof reinforcement body 102 also can for example be made of 38mm

The top plate is composed of vertical reinforcement, and the longitudinal and transverse reinforcement are installed vertically and crosswise. The roof reinforcement body 102 can also be formed by intersecting radial reinforcement and circumferential reinforcement instead of longitudinal and transverse reinforcement. The roof reinforcement body 102 has a multi-layer structure, such as a 3-layer roof vertical reinforcement, arranged on the upper and lower sides of the interior support member 111 .

字形连结配筋的环状最外钢筋115通过作为配筋连接机构的配筋联结器116，连结起来构成一体。这时，将直交配筋的最外钢筋115弯曲，绕过内装支撑构件111进行设置，使之不影响内装支撑构件103。As shown in Fig. 10 (B) and Fig. 11, the top slab of the uppermost layer and the lowermost layer of the top slab reinforcement body 102 are perpendicular to the inner peripheral side of the reinforcement, and

The ring-shaped outermost steel bar 115 of the glyph-connected reinforcement is connected to form a whole by the reinforcement coupler 116 as the reinforcement connection mechanism. At this time, the outermost steel bar 115 of the perpendicular reinforcement is bent and installed around the inner supporting member 111 so as not to affect the inner supporting member 103 .

That is, the shape of the reinforcement at the supporting end of the nuclear reactor shield wall 40 at the roof portion is as shown in FIGS. Do not interfere with each other. Therefore, near the inner end of the interior support member 111, a reinforcement coupler 116 for reinforcement connection is provided. With the reinforcement coupler 116, the vertical reinforcement 102 of the roof and the outermost reinforcement 115 will not interfere with the inner support member 111, but go around to facilitate processing and installation. In this way, the interior supporting member 111 is extended to the nuclear reactor shielding wall 40 on the inner side, and can be supported on the nuclear reactor shielding wall 40 . The temporary pillars set above the nuclear reactor shielding wall 40 are removed after the concrete is poured on the top plate to produce the strength of the concrete.

On the other hand, about 1,000 tons of the roof assembly 104 assembled on site on the ground is hoisted with a large crane 65 and hoisted into the construction site. When hoisting in, it is carried out at the stage after implementing the reinforcement of the nuclear reactor shield wall 40 and the RCCV cylindrical portion 6 to the roof joint, and completing the pouring of concrete to the bottom of the roof.

10 and 11 show a plan view and a cross-sectional view of a state in which the roof assembly 104 is hoisted and unloaded in the construction site. Before the roof assembly 104 is hoisted, temporary supporting members 112 are installed on the nuclear reactor shield wall 40 for supporting the roof assembly 104, and temporary pillars 117 are installed on the concrete end surface of the RCCV cylindrical portion 6. The roof assembly 104 hoisted into the construction site has the inner and outer ends of the built-in support member 111 supported by the temporary support member 112 and the temporary support 117 on the outer peripheral side and the inner peripheral side.

The roof reinforcement of the suspended roof assembly 104 is arranged so as not to affect the longitudinal reinforcement 57 of the RCCV cylindrical portion (cylindrical wall) 6 . Therefore, the shape of the junction of the roof vertical reinforcement 102 of the roof assembly 104 and the longitudinal reinforcement 57 of the RCCV cylindrical portion 6 is configured as shown in FIG. 10(C) and FIG. 11 .

On the roof vertical reinforcement 102 of the roof assembly 104, a reinforcement coupler 119 as a reinforcement connection mechanism is installed near the junction of the longitudinal reinforcement 57 of the RCCV cylindrical portion 6, so that the outermost reinforcement 119 on the outer peripheral side Bend into a <-shape and extend radially so that it does not affect the longitudinal reinforcement 57 of the RCCV cylindrical portion 6 . Starting from the vertical reinforcement 102 of the top plate, the outermost reinforcement 119 is bent into a < shape and extends radially, so that the interference with the longitudinal reinforcement 57 of the RCCV cylindrical part 6 can be avoided when the roof assembly 104 is hoisted and unloaded, and the hoisting and unloading is smooth , set on the top of the RCCV cylindrical part 6.

In the top plate 7 of the nuclear reactor sealed enclosure 2 shown in FIGS. 9-11 , the top plate assembly 104 can be assembled on the ground near a factory or a construction site. The roof assembly 104 assembled on the ground in advance is transported to the construction site by a large crane with the built-in support member 111, and hoisted into the construction site. When the roof assembly 104 is hoisted into the construction site, in order to make the roof orthogonal reinforcement 102 of the roof assembly 104 not affect the longitudinal reinforcement 57 of the RCCV cylindrical part, the outermost reinforcement 119 of the roof orthogonal reinforcement 102 is curved, Preset to radial. On the roof orthogonal reinforcement 102, near the junction with the longitudinal reinforcement 57 of the RCCV cylindrical portion 6, a reinforcement connector 118 is provided as a reinforcement connection mechanism, through which the outermost reinforcement 119 is combined with roof orthogonal reinforcement 102.

The outermost reinforcement 119 is pre-bent into a < shape, and the outermost reinforcement 119 of the top plate perpendicular reinforcement 102 shown in Figure 10 (C) does not affect the longitudinal reinforcement 57 of the RCCV cylindrical part 6. Between ribs 57.

By bending the outermost reinforcement 119 of the roof orthogonal reinforcement 102 into a radial shape, such as erecting the longitudinal reinforcement 57 of the RCCV cylindrical portion 6 to the roof joint, it is also possible to reliably prevent the roof assembly 104 from abutting the RCCV cylindrical portion. The impact of the longitudinal reinforcement 57 of 6, can be hoisted and unloaded smoothly.

By lifting and unloading the roof assembly 104, the work of combining reinforcement on the RCCV cylindrical portion 6 can be omitted. The existing method is to put the longitudinal reinforcement 57 of the RCCV cylindrical part 6 under the fixed roof 7, and after the roof is hoisted in, carry out the joint reinforcement of the longitudinal reinforcement 57 of the RCCV cylindrical part 6 and the fixed part of the roof Operation. By omitting the joint reinforcement work, the construction process of the roof part can be greatly shortened.

In addition, in the roof assembly 104 , the outermost reinforcement 115 of the roof perpendicular reinforcement 102 is bent in advance so that the radially inner outermost reinforcement 115 does not affect the inner end of the interior support member 111 . At this time, in order to facilitate the assembling and reinforcing work of the roof orthogonal reinforcing bar 102, a reinforcing bar coupler 116 as a reinforcing bar connection mechanism is provided near the inner end of the interior supporting member 111. Through this rib coupler 116, the outermost reinforcement 115 processed in order not to affect the inner supporting member 111 can be freely installed on the ground in advance and satisfactorily and smoothly installed on the ground. Loading bracket installed.

Usually, a loading and unloading bracket is installed on the outer surface of the nuclear reactor shield wall 40, and the inner end of the built-in supporting member is supported on the loading and unloading bracket, so that the built-in supporting member ends in front of the outermost reinforcement, so as to prevent the built-in supporting member from colliding with the outermost reinforcement. Mutual interference of the outermost reinforcement. However, in the conventional supporting structure of the roof part, it is necessary to have a detachable bracket for supporting the built-in support member. In addition, after the construction of the loading and unloading bracket on the roof portion is completed, the strength of the concrete is generated, and then it is removed. It is very troublesome to install and remove such a large-shaped loading and unloading bracket on the nuclear reactor shield wall 40, and it takes a long time, and it is also very difficult to remove the unloaded loading and unloading bracket.

For this situation, as shown in Figures 9-11, the roof assembly 104 hoisted into the construction site makes the inner end of the built-in support member 111 supported on the nuclear reactor shielding wall 40 through the temporary support 112, and the outer side of the built-in support member 111 The end part is supported by the temporary support 117 installed vertically on the RCCV cylindrical part 6, and the built-in support member 111 is stably supported by the outer peripheral side and the inner peripheral side. The internal supporting members 111 supporting the full load of the roof assembly 104 constituting the roof are hoisted in through the roof assembly 104, and are stabilized by temporary supports 112 and temporary pillars 117 above the nuclear reactor shield wall 40 and the RCCV cylindrical portion 6. support.

The built-in supporting member 111 of the roof assembly 104 welds and fixes the top plate liner 37 on the top of the cylindrical sleeve 10 from the inside under the state supported by the nuclear reactor shield wall 40 and the RCCV cylindrical portion 6 . After fixing, concrete is poured to form the RCCV roof 7 .

After the RCCV roof 7 produces the strength of poured concrete, the temporary support 112 on the nuclear reactor shielding wall 40 is removed and removed. The temporary pillars 117 of the RCCV cylindrical portion 6 are embedded in the upper portion of the RCCV cylindrical portion 6 when concrete is poured, and are left as they are. At this time, since only the temporary support 112 is provided on the nuclear reactor shield wall 40, the work of removing the temporary support 112 is easy.

(5) Modification of the top plate portion of the nuclear reactor sealed casing

FIG. 12 is an enlarged plan view showing a modified example of the top plate portion of the nuclear reactor containment enclosure 2 .

The roof portion of the nuclear reactor containment vessel (RCCV) 2 shown in this modified example is an improved version of the reactor shield wall 40 side of the roof assembly 104A. The roof assembly 104A is pre-assembled on the ground near the factory or construction site, which is the same as the roof assembly 104 shown in FIGS. 9-11 , and there is no difference.

The roof assembly 104A shown in FIG. 12 bends the inner end of the inner support member 111 so that the inner end of the inner support member 111 does not interfere with the annular reinforcement of the outermost reinforcement of the roof and the inner end of the inner support member 111. The inner end of the supporting member 111 bypasses the outermost reinforcement of the roof, and is combined and fixed with the lower flange 38 of the RCCV.

Other configurations and functions are not different from those of the RCCV top plate shown in FIGS. 9-11 , so descriptions are omitted.

(6) The installation structure of the through member and the orifice

FIG. 13 and FIG. 14 show installation structure diagrams of the penetration member 50 and the openings 51 and 52 installed on the RCCV sleeve 10 . As shown in FIG. 2 , the RCCV sleeve 10 is provided with an orifice 51 for loading and unloading equipment, an entrance and exit 52 for personnel passage, and a through member 50 for passing pipes, electric cables, and measuring equipment pipelines.

The RCCV sleeve 10 is welded on the ground near the factory or the construction site to form a whole and form a cylinder or a sleeve. The through member 50 and the openings 51 and 52 installed on the RCCV sleeve 10 are temporarily supported on the RCCV sleeve 10 by auxiliary materials such as temporary slanting rods before hoisting into the construction site. When the RCCV sleeve 10 is hoisted into the construction site, pass through the steel frame 1a from the nuclear reactor building 1 outside the RCCV, temporarily support the through member 50 and the openings 51, 52 with steel materials 120, steel wires 121, etc., and remove the temporary oblique pole etc.

13 and 14 are diagrams showing a state in which the penetration member 50 and the openings 51 and 52 mounted on the RCCV sleeve 10 are supported from the preceding steel frame 1a of the nuclear reactor building 1 . The RCCV sleeve 10 hoisted into the nuclear reactor building 1 at the construction site is temporarily supported by the penetration member 50 and the openings 51 and 52 by the preceding steel frame 1 a of the nuclear reactor building 1 . Due to the temporary support of the preceding steel frame 1a of the nuclear reactor building 1, it is possible to prevent the interference of the steel material 120 and the steel wire 121 on the RCCV reinforcement operation, and reduce the trouble of construction.

Typically, temporary members 20 are installed over the through members and apertures installed on the RCCV sleeve 10 . The temporary members 20 are replaced one by one in order to prevent the interfering temporary members from interfering with the RCCV reinforcement operation at the stage of starting the RCCV reinforcement operation.

In this way, as shown in Figures 13 and 14, the temporary support of the penetration member 50 and the openings 51, 52 installed on the RCCV sleeve 10, after the RCCV sleeve 10 is hoisted into the nuclear reactor building, is temporarily withdrawn. Member 20 temporarily supports through member 50 and orifice 51, 52 with steel material 120 and steel wire 121 etc. hanging down from the steel frame 1a of the nuclear reactor building 1 ahead of time, can effectively prevent the interference to RCCV reinforcing operation before it happens, can Reduce construction staggering.

(7) Construction method of nuclear reactor sealed casing

The nuclear reactor sealed casing (RCCV) 2 made of reinforced concrete placed in the nuclear reactor building 1 is constructed according to the steps shown in Fig. 15(A)-(H). First, as shown in FIG. 15(A), the nuclear reactor building base 4 is laid on the construction site of the nuclear reactor building 1, and the base inserting steel bars 63 protrude from the nuclear reactor building base 4 in the circumferential direction. As shown in Fig. 15(A) and (B), the base inserting reinforcing bar 63 is composed of an inner base inserting reinforcing bar 63a and an outer base inserting reinforcing bar 63b. Inserting steel bars 63a at the inner base and inserting reinforcing bars 63b at the outer base, there are, for example, 600mm-700mm intervals between the inner and outer sides, and there are multiple rows, for example, 3 rows arranged in concentric circles, toward the outer direction of the radial direction Forming a descending stepped protruding arrangement in a stepped shape.

On the base 4 of the nuclear reactor building 1 of the nuclear reactor building 1 inserted with the base inserting steel bar 63, as shown in Figure 15 (B). Hang in the RCCV sleeve (the pressure suppression chamber sleeve 16 of the first section of the sleeve) 10 and the inner reinforcement 11 of the RCCV. The hoisted RCCV sleeve 10 is set on the base 4 of the nuclear reactor building, while the inner reinforcement 11 of the RCCV is shown in Figure 4 (A) and (B), and is connected by combining the reinforcement 70 and the reinforcement as the reinforcement connection mechanism. Device 73 is connected on the inner base inserting steel bar 63a. The first row of the first section of the RCCV sleeve 10 is first joined and connected to the inner base inserting steel bar 63a on the entire circumference. After the connection of the first row is completed, the second row of the inner reinforcement 11 of the RCCV, and then the third row are connected with the joint reinforcement 70 in the same way.

When the RCCV inner reinforcement 11 is joined to the inner base insertion reinforcement, after the first row of the inner first layer is joined, the second row and the third row are joined accordingly. And because the second row and the third row are compared with the first row, the opening between the RCCV inner reinforcement 11 and the inner base inserting reinforcement 63a is enlarged stepwise, so the RCCV inner reinforcement 11 and the inner side can be carried out satisfactorily and smoothly. The joint reinforcement operation of the base plug-in reinforcement bar 63a.

At this time, the RCCV inner reinforcement 11 and the RCCV sleeve (the pressure suppression chamber sleeve 16 of the first section of the sleeve) 10 are installed on the ground near the factory or the site with a good working environment, such as on the storage yard platform. , so there is no need to assemble the scaffolding and assemble the inner reinforcement 113 of the RCCV at the construction site. Since there is no need to assemble the inner reinforcement 11 of the RCCV at the construction site, there is no need to install a scaffold for the inner reinforcement of the RCCV in the nuclear reactor building 1, and there is no need to remove the installed scaffold. Therefore, the reinforcement work of the RCCV inner reinforcement 11 and the foundation laying work of the nuclear reactor building foundation 4 can be parallelized, and construction can be efficiently performed.

After installing the RCCV sleeve 10 and the RCCV inner reinforcement 11 on the base 4 of the nuclear reactor building, as shown in Figure 15 (C), a work scaffold 75 is installed on the outer peripheral side of the RCCV inner reinforcement 11, and the work scaffold 75 is used. 75. Carry out the reinforcement operation of the RCCV outer reinforcement 12. The RCCV outer reinforcement 12 is joined to the outer base insertion reinforcement 63b of the nuclear reactor building base 4. At this time, the reinforcement operation of the RCCV outer reinforcement 12 is also after the longitudinal and transverse reinforcement operations of the first row, and then Carry out the reinforcing work of the second row and the third row in sequence. After the reinforcing work on the outermost peripheral side is completed, a formwork frame 22 is formed outside the outer reinforcing bars 12 of the RCCV, and concrete is poured as shown in FIG. 15(D). The RCCV outer reinforcement 12 is also the same as the RCCV inner reinforcement 11. After being assembled on the ground in advance, it is hoisted into the construction site and installed. In this way, the reinforcement work on the construction site is simplified.

In this way, concrete is poured while carrying out the reinforcement operation of the RCCV outer reinforcement 12, and the nuclear reactor sealed casing 2 is sequentially raised and erected. In parallel with the rise of the nuclear reactor sealed casing 2, the base lower section 5b of the nuclear reactor pressure vessel (RPV) support base 5 is hoisted into the nuclear reactor pressure vessel (RPV) support base 5 with a large crane 65, and installed on the nuclear reactor building base 4, and the RPV support base 5 is also Pre-assembled into a one-piece structure in a factory or on the ground near a construction site.

After hoisting the base lower section 5b of the RPV support base 5 into the base 4 of the nuclear reactor building for installation, as shown in Figure 15(E), use a large crane 65 to hoist the sleeve assembly 85 (85A) into the partition layer (DF) ), hoisting and unloading on the pressure suppression chamber sleeve 16 of the RPV support base 5 and the RCCV sleeve 10, and set on the RPV support base 5 and the RCCV sleeve 10.

In this way, the DF sleeve assembly 85 is assembled as an integral member in a factory with a good working environment or on the ground near a construction site. The structure of the DF sleeve assembly 85 is shown in Fig. 6-Fig. The base upper section 5 a of the RPV support base 5 is fitted into the inner peripheral side of the DF sleeve assembly 85 . The DF sleeve assembly 85 can also be constructed as shown in FIG. 8 .

The DF sleeve assembly 85 is hoisted by a large crane 65, transported to the construction site, and hoisted and unloaded in the construction site. The DF sleeve assembly 85 is shown in FIGS. 7(A) and (B), the inner side of the built-in support member 88 is supported on top of the RPV support base 5 by temporary struts 96 . In addition, the outer end of the inner supporting member 88 is combined with the partition sleeve 17 through the shear stiffening plate 98, and the partition sleeve 17 is welded to the RCCV sleeve 16 from the inner peripheral side and the outer peripheral side. Supported vertically on the RCCV sleeve 16. During this full-circle welding, the DF sleeve assembly 85 is kept in the suspended state by the crane 65, so that the load of the assembly does not work. It is carried out under the state that the DF sleeve assembly 85 is supported by the crane 65. After the full-circle welding is completed, the DF sleeve assembly Canister assembly 85 is released by crane 65 , supported by RPV support base 5 and pressure containment chamber sleeve 16 .

In this way, concrete pouring is performed on the DF sleeve assembly 85 in a state where the suspended DF sleeve assembly 85 is supported by the RPV support base 5 and the RCCV sleeve 10 . After the poured concrete produces concrete strength, unload and remove the temporary support mechanism 100 such as temporary components or jacks shown in Fig. 7 (A) and (B). In this way, the partition layer 8 that divides the interior of the nuclear reactor sealed enclosure 2 into the upper dry well 28 and the lower pressure suppression chamber 25 is formed.

During the formation of the bulkhead layer 8 in the nuclear reactor containment enclosure 2 , the cylinder 6 of the nuclear reactor containment enclosure 2 is poured with concrete and raised below the bulkhead layer 8 . As shown in FIG. 15(F), temporary pillars 91 are erected on the concrete poured outside the RCCV sleeve 10 . A plurality of temporary pillars 91 , for example 20, are vertically installed on the outer peripheral side of the RCCV sleeve 10 along the circumferential direction.

On the other hand, the DF sleeve assembly 85 is hoisted into the nuclear reactor building 1, the DF sleeve assembly 85 is installed to form the partition layer 8, and the RCCV sleeve (the second section of the sleeve) is hoisted with a large crane 65. The dry well sleeve 77) 10 and the dry well inner reinforcement 90 of the RCCV inner reinforcement are hoisted and unloaded on the partition layer 8.

The RCCV sleeve 10 (dry well sleeve 27) that is hoisted and unloaded is welded with the partition casing 17 from the inner and outer peripheral sides during the hoisting period, and the dry well sleeve 27 is installed and fixed on the partition casing 17 on. In addition, the inner reinforcement 90 of the dry well, which is hoisted and unloaded simultaneously with the dry well sleeve 27, is switched from the support of the crane 65 to the support of the temporary pillars 91 before the dry well sleeve 28 transitions to outer peripheral welding, forming a multi-temporary The state supported by the pillar 91.

In the state of supporting the inner reinforcement 90 of the dry well with the temporary support 91, use the same combined reinforcement or reinforcement joint shown in Figure 4 (A) and (B) to connect with the installed RCCV inner reinforcement 11, Integrate. Dry well sleeve 27 and dry well inner reinforcement 90 are made up of RCCV sleeve upper section and RCCV inner upper reinforcement, as shown in Figure 3, are on the ground (stacking field platform) pre-assembled on site. The dry well sleeve 27 assembled on site and the inner reinforcement 90 of the dry well are hoisted by a large crane 65, transported to the construction site, and simultaneously hoisted and unloaded at a specified position in the construction site.

Lift and unload the inner reinforcement 90 of the dry well on the cylinder 6 of the nuclear reactor sealed casing 2, as shown in Figure 15 (G), through the joint reinforcement and reinforcement joint not shown in the figure and the installed RCCV inner side (lower part) ) The reinforcing bars 11 are connected to form an integration. After the dry well inner reinforcement 90, which is the upper reinforcement of the RCCV inner side, is connected to the installed RCCV inner (lower) reinforcement 11, if necessary, on the outer peripheral side of the dry well inner reinforcement 27, a scaffolding is installed for operation. Reinforcement operation of reinforcement 93 outside the dry well.

The outer reinforcement 93 of the dry well constitutes the outer upper reinforcement of the RCCV, and the outer reinforcement 93 of the dry well is also assembled into a cylindrical shape or a sleeve shape after combining longitudinal reinforcement and transverse reinforcement. While carrying out the reinforcement operation of the reinforcement 93 outside the dry well, or after the reinforcement operation is finished, the formwork frame 22 is set around the outer periphery of the reinforcement 93 outside the dry well, and the formwork frame 22 and the sleeve 27 of the dry well In between, concrete is poured, so that the cylindrical portion 6 of the sealed casing 2 of the nuclear reactor is gradually piled up. In this case, the dry well sleeve 27 constitutes the formwork frame 22 on the inner peripheral side.

During the construction of the cylindrical portion 6 of the nuclear reactor sealed enclosure 2 , the nuclear reactor shielding wall 40 is vertically installed on the partition layer 8 corresponding to the RPV support base 5 . In the state that the nuclear reactor shielding wall 40 is installed and fixed on the partition layer 8, as shown in FIG. Temporary strut 117 for RCCV2.

The roof assembly 104 is constructed as shown in Figures 9-11, the inner end of the built-in support member 111 supporting the entire load of the roof assembly 104 is supported on the nuclear reactor shield wall 40 through the temporary support 112, and its outer end passes through the circle from RCCV2. The cylindrical part 6 is supported by temporary pillars 117 erected on the inner peripheral side and the outer peripheral side. Concrete is poured in a state where the roof assembly 104 is supported on the nuclear reactor shield wall 40 and the cylindrical portion 6 of the RCCV2.

After pouring the concrete, when the strength of the concrete is developed, the temporary pillars 117 are detached and withdrawn from the nuclear reactor shield wall 40 . Moreover, the temporary pillar 117 erected on the cylindrical part 6 of RCCV2 is embedded by pouring concrete, and remains in the cylindrical part 6 as a strength member.

According to the construction method of the nuclear reactor sealed shell 2, the RCCV sleeve 10 with the pressure suppression chamber sleeve 16 and the dry well sleeve 27, the RCCV inner (lower) reinforcement 11 and the RCCV inner reinforcement 11 based on the inner upper reinforcement 91 , clapboard layer sleeve assembly 85 (85A), nuclear reactor pressure vessel support base 5, nuclear reactor shielding wall 40 and roof assembly 104 can all be assembled near the construction site of a factory with good working environment or nuclear reactor building 1, in RCCV During construction, it can greatly reduce the work on the construction site with harsh working environment, and can improve the working efficiency of RCCV construction projects. Be safe. In addition, it is possible to greatly reduce the work on the construction site with bad working environment, and to work on the ground near the factory or the construction site with good working environment, and it is possible to use multiple storage yard platforms to make the construction of the nuclear reactor building 1 parallel and simultaneous conduct. Thereby, the engineering time of RCCV construction can be greatly shortened. For example, even if a nuclear reactor of 1.4 million KW (1400MW) level is built, the construction period can be shortened significantly compared with existing methods in one year and several months, for example, about one year and eight months. several months.

Claims (11)

1. reactor-containment vessel, it is a reinforced concrete system, it is used to hold nuclear reactor pressure container and is contained in the nuclear reactor buildings; Above-mentioned reactor-containment vessel comprises:

Cylinder wall portion, it has the shape of general cylindrical shape and is installed on the ground base section of nuclear reactor buildings;

Carrier ring portion, it is placed in the cylinder wall portion and is used for the separated by spaces of its place cylinder wall portion is become chamber up and down,

Barrier shield, it is installed in the carrier ring portion and is used for around nuclear reactor pressure container, the radiation of sending with the shielded nucleus reactor pressure vessel; And

Top plate portion, it is installed on the upper section of mounted cylinder wall portion, covering described upper section,

It is characterized in that above-mentioned top plate portion comprises:

Top plate member, it is assembled into modular construction in the outside of nuclear reactor buildings in advance, above-mentioned top plate member by handling in the nuclear reactor buildings, so that be installed on cylinder wall portion and the barrier shield; And

Concrete walls, it forms on the top plate member by casting concrete in top plate member.

2. reactor-containment vessel as claimed in claim 1, it is a reinforced concrete system, it is characterized in that, above-mentioned top plate member comprises top board sleeve that profile is roughly plate-like, top board arrangement of reinforcement body, the flange on the framework grafting muscle above the top board, interior all sides of being used to carry the supporting structure spare of top plate member loading and be engaged in the top board sleeve

By at the outside of nuclear reactor buildings assembling top board sleeve, top board arrangement of reinforcement body, framework grafting muscle, supporting structure spare and flange above the top board, above-mentioned top plate member is assembled into roughly plate-like.

3. reactor-containment vessel as claimed in claim 2, it is a reinforced concrete system, it is characterized in that, the supporting structure spare of above-mentioned top plate member has a plurality of support materials, loading in order to the carrying top plate member, above-mentioned support materials is arranged radially, and the medial end of support materials is distinguished temporary support on barrier shield by the first temporary support device, the above-mentioned first temporary support device is installed on the barrier shield in detachable mode, and the outboard end of support materials is bearing in respectively in the cylinder wall portion by the second temporary support device.

4. reactor-containment vessel as claimed in claim 3, it is a reinforced concrete system, it is characterized in that, comprise a plurality of top board arrangements of reinforcement in the above-mentioned top board arrangement of reinforcement body, these top board arrangements of reinforcement are arranged to roughly plate-like on the whole, has medial end on each above-mentioned support materials respectively, and also has medial end on each above-mentioned top board arrangement of reinforcement respectively, at least one in the two of medial end on medial end on each support materials and each top board arrangement of reinforcement is bent, and can prevent that so the medial end on medial end and each the top board arrangement of reinforcement on each support materials from conflicting mutually.

5. reactor-containment vessel as claimed in claim 4, it is a reinforced concrete system, it is characterized in that, have a plurality of vertical arrangements of reinforcement in the above-mentioned cylinder wall portion, these arrangements of reinforcement are with respect to ground base section positioned vertical, and having the outermost end respectively on each above-mentioned top board arrangement of reinforcement, the outermost end of above-mentioned each top board arrangement of reinforcement is bent and stretches radially, can prevent that so the vertical arrangement of reinforcement with each in outermost end of each top board arrangement of reinforcement from conflicting mutually.

6. the building method of reactor-containment vessel, the sealing shell is used to hold nuclear reactor pressure container, and it is a reinforced concrete system, it is characterized in that, and this method comprises following each step:

The cylinder wall portion that will have a general cylindrical shape shape is assemblied on the ground base section in the nuclear reactor buildings;

Barrier shield is assemblied in the carrier ring portion, and above-mentioned barrier shield is used for around nuclear reactor pressure container, the radiation of sending with the shielded nucleus reactor pressure vessel;

Supporting member is assemblied in the cylinder wall portion in detachable mode;

In advance in the outside of nuclear reactor buildings assembling top plate member;

With the top plate member handling in the nuclear reactor buildings and be installed on supporting member and the barrier shield; And

Casting concrete in top plate member is with the concrete walls that are shaped on top plate member.

7. method as claimed in claim 6, it is characterized in that, above-mentioned installation step comprises such step: the supporting structure spare that prepare to have the top board sleeve, top board arrangement of reinforcement body of plate-like roughly, framework grafting muscle and being used to carries the loading of top plate member above the top board also comprises such step: in the outside of nuclear reactor buildings with top board sleeve, top board arrangement of reinforcement body, framework grafting muscle and supporting structure spare are assembled into roughly plate-like above the top board.

8. method as claimed in claim 7, it is characterized in that, above-mentioned installation step comprises such step: prepare to have the roughly flange of plate-like, and such step: the bottom that flange is assemblied in the top board sleeve in the outside of nuclear reactor buildings, have a plurality of support materials on the supporting structure spare of above-mentioned top plate member, loading in order to the carrying top plate member, each above-mentioned supporting structure spare has medial end and distributes radially, and comprise a plurality of top board arrangements of reinforcement in the above-mentioned top board arrangement of reinforcement body, these top board arrangements of reinforcement are arranged to roughly plate-like on the whole, each above-mentioned top board arrangement of reinforcement has medial end, and, also comprise such step: handle at least one in the two of medial end on medial end on each support materials and each top board arrangement of reinforcement in the outside of nuclear reactor buildings, with with its bending, thereby prevent that the medial end on medial end on each support materials and each top board arrangement of reinforcement from conflicting mutually.

9. method as claimed in claim 8, it is characterized in that, above-mentioned cylinder wall portion has a plurality of vertical arrangements of reinforcement, these arrangements of reinforcement are with respect to ground base section positioned vertical, and have the outermost end respectively on each above-mentioned top board arrangement of reinforcement, this method also comprises such step: handle the outermost end of above-mentioned each top board arrangement of reinforcement, with it is crooked and stretching, extension radially, thereby the vertical arrangement of reinforcement with each in outermost end that prevents each top board arrangement of reinforcement conflicts mutually.

10. method as claimed in claim 9 is characterized in that, above-mentioned medial end and above-mentioned outermost end on each top board arrangement of reinforcement are connected on the top board arrangement of reinforcement by link respectively.

11. method as claimed in claim 6 is characterized in that, has a plurality of support materials on the supporting structure spare of above-mentioned top plate member, above-mentioned support materials arranges that radially this method also comprises following each step:

The first temporary support device is installed on the barrier shield in detachable mode;

The second temporary support device is installed in the cylinder wall portion in detachable mode;

The medial end of each support materials is bearing on the first temporary support device; And

The outboard end of each support materials is bearing on the second temporary support device, so that the loading of top plate member is bearing in respectively on the medial end and outboard end of each support materials.

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