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CN110993128A - Grillwork for pressurized water reactor fuel assembly - Google Patents

Grillwork for pressurized water reactor fuel assembly Download PDF

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Publication number
CN110993128A
CN110993128A CN201911214350.7A CN201911214350A CN110993128A CN 110993128 A CN110993128 A CN 110993128A CN 201911214350 A CN201911214350 A CN 201911214350A CN 110993128 A CN110993128 A CN 110993128A
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China
Prior art keywords
pressurized water
water reactor
reactor fuel
fuel assembly
grid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911214350.7A
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Chinese (zh)
Inventor
王君
陈晓明
谢哲东
王跃勇
武海巍
杨丹
赵丽萍
焦海坤
周丽娜
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Jilin Agricultural University
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Jilin Agricultural University
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Publication date
Application filed by Jilin Agricultural University filed Critical Jilin Agricultural University
Priority to CN201911214350.7A priority Critical patent/CN110993128A/en
Publication of CN110993128A publication Critical patent/CN110993128A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
    • G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
    • G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
    • G21C3/34—Spacer grids
    • G21C3/352—Spacer grids formed of assembled intersecting strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Catalysts (AREA)

Abstract

本发明具体是一种压水堆燃料组件用的格架，属于压水堆燃料组件领域，包括外条带和内条带，所述内条带在多个所述外条带包裹的内部设置有多个，且呈互相交错；其中，在所述外条带内侧表面上设有多个呈两排等间距分布的凸台，而在凸台与外条带连接处的外条带上板材厚度设置加厚；进而，采用在凸台与外条带连接处的外条带上板材厚度设置加厚，其增材的基础方式，增大了凸台处的外条带的强度和刚度，能有效避免因受到过大载荷而产生的裂纹和变形，可靠性更高；实现了工艺简单、加工效率高。

Figure 201911214350

The invention specifically relates to a frame for pressurized water reactor fuel assemblies, belonging to the field of pressurized water reactor fuel assemblies, comprising outer strips and inner strips, wherein the inner strips are arranged inside a plurality of the outer strips wrapped There are a plurality of them, and they are staggered with each other; wherein, a plurality of bosses distributed in two rows at equal intervals are arranged on the inner surface of the outer strip, and a plate is placed on the outer strip at the connection between the bosses and the outer strip. The thickness is set to be thicker; further, the thickness of the plate on the outer strip at the connection between the boss and the outer strip is set to be thickened, and the basic method of adding materials increases the strength and rigidity of the outer strip at the boss, It can effectively avoid cracks and deformation caused by excessive load, and has higher reliability; it realizes simple process and high processing efficiency.

Figure 201911214350

Description

Grillwork for pressurized water reactor fuel assembly
Technical Field
The invention relates to the field of pressurized water reactor fuel assemblies, in particular to a grid for a pressurized water reactor fuel assembly.
Background
The prior art grids are composed of inner and outer straps, the inner straps being interleaved and surrounded by the outer straps. The inner strips and the outer strips are both formed by pressing metal plates, and the inner strips and the outer strips are connected by welding; the defects are as follows:
the inner strip and the outer strip are both processed by metal plates through pressure; the pressure processing is easy to generate cracks and has the phenomenon of springback, so that the defects are many, the process is complex and the processing efficiency is low; in addition, the bulges on the inner strip and the outer strip are formed by pressure processing, so that the local plate is thinned, and the local rigidity and strength of the strips are influenced;
in view of the above problems, the present invention provides a lattice for a pressurized water reactor fuel assembly.
Disclosure of Invention
The present invention is directed to a grid for a pressurized water reactor fuel assembly to solve the above-mentioned problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a grillwork for a pressurized water reactor fuel assembly comprises outer straps and inner straps, wherein a plurality of inner straps are arranged in the outer straps in a wrapping mode and are mutually staggered;
the manufacturing method aims to solve the problems of multiple defects, complex process and poor manufacturing efficiency of the existing grid manufacturing process; the defects of poor structural rigidity and strength of the conventional grid frame strips are overcome, and the problem that the internal strips cannot be well limited during assembly of the conventional grid frame outer strips is solved; a plurality of bosses which are distributed in two rows at equal intervals are arranged on the inner side surface of the outer strip, and the thickness of the plate on the outer strip at the joint of the bosses and the outer strip is thickened;
furthermore, the thickness of the plate on the outer strip at the joint of the boss and the outer strip is thickened, and the lug on the surface of the outer strip is adopted, so that the strength and rigidity of the outer strip at the boss are increased, cracks and deformation caused by excessive load can be effectively avoided, and the reliability is higher; the method has the advantages of simple process and high processing efficiency.
In order to further provide the using effect of the grid for the pressurized water reactor fuel assembly: the boss is provided at the edge of the inner side surface of the outer strip.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: and a plurality of guide fins which are distributed at equal intervals are respectively arranged at the edges of two sides of the outer strip.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the guide vanes are arranged to be inclined inwardly.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the inner side surface of the guide fin is provided with a reinforcing structure, the reinforcing structure is limited by a limiting groove formed in the outer strip, and the reinforcing structure and the guide fin are vertically distributed.
Furthermore, the reinforcing structure increases the rigidity of the guide vane in the vertical direction, and reduces the risk that adjacent components are hung during loading and unloading; in addition, the inner straps can be limited and guided during grid assembly, and the assembly precision and reliability are improved.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the reinforcing structure is a reinforcing rib.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the reinforcing ribs are fan-shaped.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the reinforcing structure is a reinforcing plate, and an open slot is formed in the reinforcing plate.
In order to further provide the use effect of the grid for the pressurized water reactor fuel assembly: the inner strip is provided with a plurality of clamping grooves distributed in an array manner, and the surface of the inner strip is provided with a plurality of lugs distributed in two rows at equal intervals.
Compared with the prior art, the invention has the beneficial effects that:
1. the thickness of the plate on the outer strip at the joint of the boss and the outer strip is thickened, and the basic material increase mode of the plate increases the strength and rigidity of the outer strip at the boss, so that cracks and deformation caused by excessive load can be effectively avoided, and the reliability is higher; the method has the advantages of simple process and high processing efficiency;
2. the reinforcing structure increases the rigidity of the guide vane in the vertical direction, and reduces the risk that adjacent assemblies are hung during loading and unloading; in addition, the inner straps can be limited and guided during grid assembly, and the assembly precision and reliability are improved.
Drawings
Fig. 1 is a schematic structural view of a lattice for a pressurized water reactor fuel assembly according to the present invention.
Fig. 2 is a schematic view showing the structure of the assembly of the outer straps and the inner straps in the lattice for a pressurized water reactor fuel assembly according to the present invention.
Fig. 3 is a partial structure diagram of the outer stripe in fig. 2.
Fig. 4 is a schematic structural view of fig. 3 with reinforcing ribs added.
Fig. 5 is a schematic structural view of fig. 3 with a reinforcing plate added.
Fig. 6 is a partial structural view of the inner band in fig. 2.
In the figure:
1-outer strip; 2-inner strip;
11-a boss; 12-reinforcing ribs; 13-guide vanes; 14-a reinforcing plate; 15-open slots;
21-a bump; 22-card slot.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1
The prior art grids are composed of inner and outer straps, the inner straps being interleaved and surrounded by the outer straps. The inner strips and the outer strips are both formed by pressing metal plates, and the inner strips and the outer strips are connected by welding; the defects are as follows:
the inner strip and the outer strip are both processed by metal plates through pressure; the pressure processing is easy to generate cracks and has the phenomenon of springback, so that the defects are many, the process is complex and the processing efficiency is low; in addition, the protrusions on the inner and outer strips, due to the press forming, cause local thinning of the sheet material, affecting the local stiffness and strength of the strips.
In view of the above problems, the present invention provides a lattice for a pressurized water reactor fuel assembly.
As shown in fig. 1 and 2, the lattice for the pressurized water reactor fuel assembly includes a plurality of outer straps 1 and a plurality of inner straps 2, wherein the inner straps 2 are disposed inside the outer straps 1 and are staggered with each other;
the manufacturing method aims to solve the problems of multiple defects, complex process and poor manufacturing efficiency of the existing grid manufacturing process; the defects of poor structural rigidity and strength of the conventional grid frame strips are overcome, and the problem that the internal strips cannot be well limited during assembly of the conventional grid frame outer strips is solved; as shown in fig. 2-6, a plurality of bosses 11 are arranged on the inner side surface of the outer strip 1 in two rows and are distributed at equal intervals, and the thickness of the plate on the outer strip 1 at the joint of the bosses 11 and the outer strip 1 is thickened;
furthermore, the thickness of the plate on the outer strip 1 at the joint of the boss 11 and the outer strip 1 is thickened, and the basic material adding mode of the thickened plate increases the strength and rigidity of the outer strip 1 at the boss 11, so that cracks and deformation caused by excessive load can be effectively avoided, and the reliability is higher; the method has the advantages of simple process and high processing efficiency.
For further explanation, the following are specific:
said boss 11 is provided at the edge of the inner side surface of the outer strip 1.
A plurality of guide vanes 13 which are distributed at equal intervals are respectively arranged at the two side edges of the outer strip 1.
Preferably, the guide vanes 13 are arranged to be inwardly inclined.
Example 2
The present embodiment is further defined on the basis of embodiment 1.
In the prior art grids, the guide fins of the outer straps are bent inwards in the grid to reduce the risk of adjacent modules getting caught during handling, but the inwardly bent guide fins have a reduced stiffness in the vertical direction and are prone to deform in the vertical direction during handling of the modules.
As shown in fig. 4 and 5, in order to increase the rigidity of the guide vane 13 in the vertical direction and reduce the risk of the adjacent components being caught during loading and unloading, a reinforcing structure is arranged on the inner side surface of the guide vane 13, the reinforcing structure is limited by a limiting groove formed on the outer strip 1, and the reinforcing structure and the guide vane 13 are vertically distributed.
Furthermore, the reinforcing structure increases the rigidity of the guide vane 13 in the vertical direction, and reduces the risk that adjacent components are hung during loading and unloading; in addition, the inner straps 2 can be limited and guided during the assembly of the framework, so that the assembly precision and reliability are improved.
The reinforcing structure is a reinforcing rib 12.
Preferably, the reinforcing rib 12 is fan-shaped.
Example 3
The inventive example differs from example 2 only in that:
the reinforcing structure is a reinforcing plate 14, and an open slot 15 is formed in the reinforcing plate 14.
Example 4
The examples of the present invention are further defined on the basis of examples 1 to 3.
The inner strip 2 is provided with a plurality of clamping grooves 22 distributed in an array manner, and the surface of the inner strip 2 is provided with a plurality of lugs 21 distributed in two rows at equal intervals.
The working principle of the invention is as follows: according to the grillwork for the pressurized water reactor fuel assembly, the plate thickness on the outer strip 1 at the joint of the boss 11 and the outer strip 1 is thickened, and the strength and rigidity of the outer strip 1 at the boss 11 are increased by adopting the material increase basic mode, so that cracks and deformation caused by overlarge load can be effectively avoided, and the reliability is higher; the method has the advantages of simple process and high processing efficiency; the reinforcing structure increases the rigidity of the guide vane 13 in the vertical direction, and reduces the risk that adjacent components are hung during loading and unloading; in addition, the inner straps 2 can be limited and guided during the assembly of the framework, so that the assembly precision and reliability are improved.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1.一种压水堆燃料组件用的格架，包括外条带（1）和内条带（2），所述内条带（2）在多个所述外条带（1）包裹的内部设置有多个，且呈互相交错，其特征在于，在所述外条带（1）内侧表面上设有多个呈两排等间距分布的凸台（11），而在凸台（11）与外条带（1）连接处的外条带（1）上板材厚度设置加厚。1. A grid for a pressurized water reactor fuel assembly, comprising an outer strip (1) and an inner strip (2), the inner strip (2) being wrapped around a plurality of the outer strips (1) The interior is provided with a plurality of them, and they are interlaced with each other. ) and the outer strip (1) where the upper plate thickness is set to be thicker. 2.根据权利要求1所述的一种压水堆燃料组件用的格架，其特征在于，所述凸台（11）设置在外条带（1）内侧表面的边缘处。2 . The grid for a pressurized water reactor fuel assembly according to claim 1 , wherein the boss ( 11 ) is arranged at the edge of the inner surface of the outer strip ( 1 ). 3 . 3.根据权利要求1所述的一种压水堆燃料组件用的格架，其特征在于，在所述外条带（1）两侧边缘处分别设置多个呈等间距分布的导向翼片（13）。3 . The grid for a pressurized water reactor fuel assembly according to claim 1 , wherein a plurality of guide fins distributed at equal intervals are respectively provided at the edges of both sides of the outer strip ( 1 ). 4 . (13). 4.根据权利要求1所述的一种压水堆燃料组件用的格架，其特征在于，所述导向翼片（13）内侧表面上设置有加强结构，而加强结构通过外条带（1）上开设有的限位槽进行限位，以及加强结构与导向翼片（13）呈垂直分布。4. A grid for a pressurized water reactor fuel assembly according to claim 1, characterized in that a reinforcement structure is provided on the inner surface of the guide fin (13), and the reinforcement structure passes through the outer strip (13). ) for limiting the position, and the reinforcing structure and the guide fins (13) are vertically distributed. 5.根据权利要求3或4所述的一种压水堆燃料组件用的格架，其特征在于，所述导向翼片（13）设置向内倾斜。5 . The grid for a pressurized water reactor fuel assembly according to claim 3 or 4 , wherein the guide fins ( 13 ) are arranged to be inclined inward. 6 . 6.根据权利要求4所述的一种压水堆燃料组件用的格架，其特征在于，所述加强结构为加强筋（12）。6 . The grid for a pressurized water reactor fuel assembly according to claim 4 , wherein the reinforcing structure is a reinforcing rib ( 12 ). 7 . 7.根据权利要求6所述的一种压水堆燃料组件用的格架，其特征在于，所述加强筋（12）呈扇形状。7 . The grid for a pressurized water reactor fuel assembly according to claim 6 , wherein the reinforcing rib ( 12 ) is in the shape of a fan. 8 . 8.根据权利要求4所述的一种压水堆燃料组件用的格架，其特征在于，所述加强结构为加强板（14），而加强板（14）上开设有开口槽（15）。8 . The grid for a pressurized water reactor fuel assembly according to claim 4 , wherein the reinforcing structure is a reinforcing plate ( 14 ), and the reinforcing plate ( 14 ) is provided with an opening groove ( 15 ). 9 . . 9.根据权利要求1-8任一所述的一种压水堆燃料组件用的格架，其特征在于，所述内条带（2）上开设有多个呈阵列分布的卡槽（22），以及，在所述内条带（2）表面上设有多个呈两排等间距分布的凸块（21）。9 . The grid for a pressurized water reactor fuel assembly according to any one of claims 1 to 8 , wherein a plurality of card slots ( 22 ) arranged in an array are opened on the inner strip ( 2 ). ), and, on the surface of the inner strip (2), a plurality of bumps (21) are arranged in two rows and equally spaced.
CN201911214350.7A 2019-12-02 2019-12-02 Grillwork for pressurized water reactor fuel assembly Pending CN110993128A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111524616A (en) * 2020-05-14 2020-08-11 吉林农业大学 Integral positioning grid frame based on additive manufacturing process

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659542A (en) * 1984-10-03 1987-04-21 Westinghouse Electric Corp. Grid structure for nuclear fuel assembly
JP2007014978A (en) * 2005-07-06 2007-01-25 Nissan Motor Co Ltd Method and device for manufacturing formed component
JP2010185778A (en) * 2009-02-12 2010-08-26 Nuclear Fuel Ind Ltd Spacer for boiling water reactor fuel assembly, fuel assembly including the same, and method of designing the spacer
CN103177777A (en) * 2013-01-15 2013-06-26 上海核工程研究设计院 Fuel assembly grid capable of enhancing rigidity and reducing hooking risk
CN106104700A (en) * 2014-04-03 2016-11-09 西屋电气有限责任公司 Low pressure drop nuclear fuel assembly bottom nozzle
CN107020335A (en) * 2016-01-29 2017-08-08 株式会社神户制钢所 The manufacture method of stamping part, stamping part and press molding equipment
CN107980163A (en) * 2017-09-20 2018-05-01 岭澳核电有限公司 Grid spacer and fuel assembly
CN110164567A (en) * 2018-03-30 2019-08-23 吉林农业大学 A kind of PWR fuel assembly screen work and the fuel assembly with this screen work

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659542A (en) * 1984-10-03 1987-04-21 Westinghouse Electric Corp. Grid structure for nuclear fuel assembly
JP2007014978A (en) * 2005-07-06 2007-01-25 Nissan Motor Co Ltd Method and device for manufacturing formed component
JP2010185778A (en) * 2009-02-12 2010-08-26 Nuclear Fuel Ind Ltd Spacer for boiling water reactor fuel assembly, fuel assembly including the same, and method of designing the spacer
CN103177777A (en) * 2013-01-15 2013-06-26 上海核工程研究设计院 Fuel assembly grid capable of enhancing rigidity and reducing hooking risk
CN106104700A (en) * 2014-04-03 2016-11-09 西屋电气有限责任公司 Low pressure drop nuclear fuel assembly bottom nozzle
CN107020335A (en) * 2016-01-29 2017-08-08 株式会社神户制钢所 The manufacture method of stamping part, stamping part and press molding equipment
CN107980163A (en) * 2017-09-20 2018-05-01 岭澳核电有限公司 Grid spacer and fuel assembly
CN110164567A (en) * 2018-03-30 2019-08-23 吉林农业大学 A kind of PWR fuel assembly screen work and the fuel assembly with this screen work

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111524616A (en) * 2020-05-14 2020-08-11 吉林农业大学 Integral positioning grid frame based on additive manufacturing process
CN111524616B (en) * 2020-05-14 2023-09-01 吉林农业大学 Integral spacer grid based on additive manufacturing process

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