CN107665742A - It is active with the passive naval reactor being combined meet an urgent need residual heat removal system - Google Patents
It is active with the passive naval reactor being combined meet an urgent need residual heat removal system Download PDFInfo
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- CN107665742A CN107665742A CN201710719215.2A CN201710719215A CN107665742A CN 107665742 A CN107665742 A CN 107665742A CN 201710719215 A CN201710719215 A CN 201710719215A CN 107665742 A CN107665742 A CN 107665742A
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- heat removal
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000002826 coolant Substances 0.000 claims abstract description 46
- 238000009833 condensation Methods 0.000 claims abstract description 36
- 230000005494 condensation Effects 0.000 claims abstract description 36
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 230000003020 moisturizing effect Effects 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 8
- 208000028659 discharge Diseases 0.000 description 15
- 239000002699 waste material Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 239000013505 freshwater Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
-
- 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)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The present invention relates to a kind of active with the emergent residual heat removal system of the passive naval reactor being combined, including once through steam generator, the first residual heat removal system, the second residual heat removal system and input pipe, efferent duct.Once through steam generator is arranged in containment, and the first residual heat removal system, the second residual heat removal system are arranged on outside containment.When first residual heat removal system works, after the gaseous coolant of first outlet outflow enters the condensation of the first condensing unit, condensation collecting box is flowed into through second outlet to be collected, the cooling agent condensed in collecting box is transported in once through steam generator by water plug by first entrance；When second residual heat removal system works, after the gaseous coolant of first outlet outflow enters the condensation of the second condensing unit, it is transported to by gravity through first entrance in once through steam generator.With reference to the respective advantage of two kinds of heat extraction modes, it is applicable that accident scope is wide, and thermal discharge efficiency is high, while improves system reliability and power plant safety.
Description
Technical field
The present invention relates to naval reactor engineered safety system, more specifically to a kind of active with passive phase knot
The emergent residual heat removal system of the naval reactor of conjunction.
Background technology
The main purpose of naval reactor security system is to ensure that after generation accident, ensure reactor sudden closure,
The discharge of residual heat of nuclear core and containment it is complete, to limit the development of accident and to mitigate the consequence of accident.Wherein accident conditions
Lower reactor waste discharge problem is particularly important, and it is directly connected to reactor safety, and processing will be bad to cause primary Ioops to cool down
The thawing of agent boiling even reactor core, therefore the design of emergency reactor waste heat heat-extraction system is always the crucial skill of reactor design
One of art.
Naval reactor has significantly different compared with land reactor, such as space is limited on ship, it is desirable to reactor and its
Systems attempt minimizes；Marine ships are limited away from land, fresh water, it is difficult to supplement；Steamed compared to land commonly used U-tube
Vapour generator, for marine vapor generator based on once through steam generator, it has small volume, efficiency high and the small spy of water capacity
Point etc..
Domestic naval reactor is mainly military use at present, not yet civilian, Residual heat removal technology relative closure of meeting an urgent need.
Land emergency reactor residual heat removal system mainly has two generation reactors and the use of the active emergent Residual heat removal technology of use
Three generations's reactor of passive emergent Residual heat removal technology.
Two generations active emergent residual heat removal system, by taking typical M310 types reactor as an example, its emergent Residual heat removal work(
It can realize that system is mainly by auxiliary feed-water tank, auxiliary feed water pump and corresponding pipe valve using active auxiliary feedwater system
Composition.Exchanged heat by the way that the cooling water pump in auxiliary feed-water tank is sent into U-tube steam generator secondary side, and by caused by
Steam is discharged into ultimate heat sink-air, forms open circulation, reaches the purpose for taking away reactor waste.Active emergent waste heat row
It is thermal discharge efficiency height to go out system features, but when the beyond design basis accidents such as whole audience power-off occur, system can not be run, and be met an urgent need remaining
Hot discharge function will be lost.Accordingly, it is capable to which the accident conditions of dynamic emergent residual heat removal system reply is limited, potential safety hazard be present.
Three generations's nuclear power station has higher inherent safety because passive technology is employed.With the passive of AP1000
Exemplified by residual heat removal system, system material-changing water tank and corresponding pipe as built in passive residual heat removal heat exchanger, containment
Road valve composition.It is arranged in containment, using primary Ioops passive residual heat removal scheme, utilizes the close of primary Ioops cooling agent
Degree difference produces driving force, forms closed cycle, reactor waste is reached into the cooling water in ultimate heat sink-material-changing water tank.Non- energy
Dynamic system is due to eliminating active component, the features such as independent of external power source, simplifies system design, and improve system
Reliability, improve power plant safety.But passive system is relatively low there is also heat transfer efficiency, in fortune nuclear power station operating experience deficiency
The problems such as.
In addition, it is also a kind of active with the passive secondary side core heat lead-out device being combined, by active auxiliary
Water supply system and Passive residual heat removal system are combined, and reactor waste can be performed under different accident conditionses and led
Go out function.The program has played active and passive system each advantage, but the program is more suitable for land nuclear reactor, if should
Problems with is still suffered from for marinereactor to be difficult to overcome：
1st, naval reactor hull space is limited, can not set large water tank, if using active auxiliary feedwater system
Waste heat is discharged, it is necessary to set the larger auxiliary feed-water tank of volume；
2nd, marine fresh water resource-constrained, the more land difficulty of water process, if using more than active auxiliary feedwater system discharge
Heat, open circulation need to will be formed, this is caused to the fresh water on ship largely by discharge of steam caused by steam generator to air
Waste.
Naval reactor tends to the once through steam generator from small volume, efficiency high due to own characteristic, due to straight
Steam generator secondary side capacity very little (compared with U-tube steam generator) is flowed, if using active auxiliary feedwater system
Waste heat is discharged, need to will largely to air, it is secondary to easily cause once through steam generator for discharge of steam as caused by steam generator
Side " flash distillation ", it is possible to make heat transfer deterioration, cause more serious accident.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of active to be met an urgent need with the passive naval reactor being combined
Residual heat removal system.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of active with the passive ship being combined
With emergency reactor residual heat removal system, including once through steam generator, the first residual heat removal system, the second residual heat removal system
And input pipe, efferent duct；
The once through steam generator is arranged in containment, and the once through steam generator is provided with first entrance and the
One outlet；
The input pipe is connected with the first entrance, and the efferent duct is connected with the first outlet, and described more than first
Hot discharge system, the second residual heat removal system are arranged on outside the containment；
First residual heat removal system includes the first condensing unit, condensation collecting box, water plug being sequentially connected, institute
Stating the first condensing unit includes second entrance and second outlet, and the condensation collecting box includes the 3rd entrance and the 3rd outlet, institute
Second entrance is stated to be connected with the efferent duct, the second outlet is connected with the 3rd entrance, the water plug respectively with
3rd outlet connects with input pipe；
Second residual heat removal system includes being used for the second condensing unit to gaseous coolant condensation, and described second is cold
Solidifying device is connected with the input pipe and efferent duct respectively；
During the first residual heat removal system work, the gaseous coolant through first outlet outflow enters described first
After condensing unit condensation, flow into the condensation collecting box through the second outlet and be collected, the water plug will be described cold
Cooling agent in solidifying collecting box is transported in the once through steam generator by the first entrance；
During the second residual heat removal system work, the gaseous coolant through first outlet outflow enters described second
After condensing unit condensation, it is transported to by gravity through the first entrance in the once through steam generator.
Preferably, first condensing unit includes the first condenser, and first condenser includes housing and described
The condenser pipe set in housing, the condenser pipe are connected with component cooling water, and the second entrance, second outlet are arranged on described
On housing.
Preferably, the first control valve of control pipeline switch is provided between the second entrance and the efferent duct.
Preferably, liquid coolant is stored in the condensation collecting box, and liquid level is not less than the first entrance.
Preferably, the first entrance is located at the lower end of the once through steam generator, and the first outlet is positioned at described
The upper end of once through steam generator, the liquid level of the cooling agent in the condensation collecting box is in the first entrance and described the
Between one outlet；Or, the first entrance, first outlet are respectively positioned on the upper end of the once through steam generator.
Preferably, the water plug includes drawing water unit, and the unit that draws water includes the suction pump being arranged in series and the
One reverse valve, the first reverse valve are connected with the exit end of the suction pump.
Preferably, the water plug includes at least two units that draw water being arranged in parallel.
Preferably, the second control of control pipeline switch is provided between the downstream of the water plug and the input pipe
Valve.
Preferably, the second reverse valve is provided between second control valve and the input pipe.
Preferably, second condensing unit includes being stored with the cooling cylinder of cooling agent and is arranged in the cooling cylinder
The second condenser；
Second condenser includes condensation chamber and the 4th entrance connect with the condensation chamber, the 4th exported, and described the
Four entrances are connected by the efferent duct with the first outlet, and the 4th outlet is entered by the input pipe with described first
Mouth connection, is condensed, and be flowed into the once through steam generator after entering the condenser for gaseous coolant.
Preferably, second residual heat removal system also includes the moisturizing list being arranged in parallel with second condensing unit
Member, the moisturizing unit include being stored with the water supply tank of cooling agent, and the water supply tank is provided with the 5th entrance and the 5th outlet；
5th entrance is connected by the efferent duct with the first outlet, and the 5th outlet is located at the moisturizing
Below the liquid level of case, and it is connected by the input pipe with the first entrance.
Preferably, the moisturizing unit be additionally included in the 5th outlet downstream set, with control from the water supply tank
The current-limiting apparatus of the flow of the cooling agent of outflow.
Preferably, the current-limiting apparatus includes current limiting plate, and the current limiting plate is provided with least one metering hole, the current limliting
Total circulation area in hole is less than the endoporus area of the described 5th outlet.
Preferably, the moisturizing unit be additionally included in the current-limiting apparatus downstream set, the with control pipeline switch
Three control valves.
Preferably, the downstream of second condensing unit and the moisturizing unit is provided with the 4th control of control pipeline switch
Valve, to control second condensing unit and the moisturizing unit to convey cooling agent to the first entrance；
The upstream of second condensing unit and the moisturizing unit controls the efferent duct and second condensing unit
5th control valve of the pipe switch between the moisturizing unit.
Preferably, the downstream of the 4th control valve and the 3rd reverse valve is provided between the input pipe.
Implement the active with the emergent residual heat removal system of the passive naval reactor being combined of the present invention, have with following
Beneficial effect：Using active with the passive emergency reactor residual heat removal system being combined, using passive as active standby,
With reference to the respective advantage of two kinds of heat extraction modes, it is applicable that accident scope is wide, and thermal discharge efficiency is high, while improves system reliability and power plant
Security, reduce extensive radioactivity release probability；
The present invention is not provided with auxiliary feed-water tank, saves arrangement space, be applicable using closed cycle discharge reactor waste
Marine naval reactor, be advantageous to the development of marine nuclear facilities；Without to idle discharge steam, it can prevent once through steam generator from dodging
Steam.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is active with the emergent residual heat removal system of the passive naval reactor being combined in the embodiment of the present invention
Principle schematic diagram.
Embodiment
In order to which technical characteristic, purpose and the effect of the present invention is more clearly understood, now compares accompanying drawing and describe in detail
The embodiment of the present invention.
As shown in figure 1, active in a preferred embodiment of the invention is met an urgent need with the passive naval reactor being combined
Residual heat removal system includes once through steam generator 1, the first residual heat removal system 2, the second residual heat removal system 3 and input pipe
4th, efferent duct 5.
Once through steam generator 1 is arranged in containment 6, and once through steam generator 1 is provided with first entrance 11 and first
Outlet 12.Input pipe 4 is connected with first entrance 11, and efferent duct 5 is connected with first outlet 12, the first residual heat removal system 2, second
Residual heat removal system 3 is arranged on outside containment 6, is avoided taking the space in containment 6, is saved arrangement space, is applicable sea
Naval reactor.
First residual heat removal system 2 includes the first condensing unit 21, condensation collecting box 22, water plug being sequentially connected
23, the first condensing unit 21 includes second entrance 211 and second outlet 212, and condensation collecting box 22 includes the 3rd entrance 221 and the
Three outlets 222, second entrance 211 is connected with efferent duct 5, and second outlet 212 is connected with the 3rd entrance 221, and water plug 23 divides
It is not connected with the 3rd outlet 222 and input pipe 4；
Second residual heat removal system 3 includes being used for the second condensing unit 31 to gaseous coolant condensation, the second condensation dress
31 are put to be connected with input pipe 4 and efferent duct 5 respectively.Cooling agent is usually water, and equipment is cooled down.
First residual heat removal system 2, the second residual heat removal system 3 put into operation when being typically different, and the first residual heat removal system 2 is
Active emergent Residual heat removal subsystem, the second residual heat removal system 3 are passive emergent Residual heat removal subsystem.Reacting
Heap is lost under the accident conditions of normal heat extraction path, and preferentially put into operation the first residual heat removal system 2；When the nothing of the first residual heat removal system 2
Method puts into operation, then put into operation the second residual heat removal system of secondary side 3.
Reactor is lost under the accident conditions of normal heat extraction path, and reactor emergency shut-down, the first residual heat removal system 2 works
When, after the gaseous coolant of the outflow of first outlet 12 is in a liquid state into the condensation of the first condensing unit 21, flowed through second outlet 212
Enter to condense collecting box 22 to be collected, the cooling agent condensed in collecting box 22 is transported to directly by water plug 23 by first entrance 11
Flow in steam generator 1.
The pipe side water of once through steam generator 1 is heated by reactor waste produces steam, and steam enters first by efferent duct 5
The shell-side of condensing unit 21, it is water in the shell-side condensation of the first condensing unit 21.Steam heat passes to the pipe side of the first condensing unit 21
The cooling water that component cooling water system provides.Condensation collecting box 22 of the condensed water by gravity stream toward downstream, forms closed cycle, will
Reactor waste brings the component cooling water in the condensing unit of ultimate heat sink-first 21.The driving force entirely circulated is by active
Water plug 23 provides, and water plug 23 ensures normal power supply equipped with emergency power supply.
When full factory's dead electricity occurring or other cause the first 2 disabled accident of residual heat removal system, the second Residual heat removal
System 3 works, and after the gaseous coolant flowed out through first outlet 12 enters the condensation of the second condensing unit 31, enters by gravity through first
Mouth 11 is transported in once through steam generator 1.
The upstream for the node that input pipe 4 is connected with the first residual heat removal system 2, the second residual heat removal system 3 is provided with the 6th
Control valve 41；The downstream for the node that efferent duct 5 is connected with the first residual heat removal system 2, the second residual heat removal system 3 is provided with the 7th
Control valve 51.It is active when the passive naval reactor being combined meets an urgent need residual heat removal system starting, can be first by the 6th
The control valve 51 of control valve 41 and the 7th is closed, and allows input pipe 4, the down-stream system of efferent duct 5 to be isolated, and meets emergent Residual heat removal
System access condition.
First condensing unit 21 includes the first condenser, and the first condenser includes housing 213 and the setting in housing 213
Condenser pipe 214, condenser pipe 214 are connected with component cooling water.Second entrance 211, second outlet 212 are arranged on housing 213, are allowed
Gaseous coolant is entered in housing 213, and component cooling water system is that condenser pipe 214 provides cooling water, will enter housing 213
Gaseous coolant is cooled to liquid.
The first control valve 215 of control pipeline switch is provided between second entrance 211 and efferent duct 5, available for controlling gas
Whether state cooling agent is flowed into the first condensing unit 21, when needing to carry out heat extraction with the first residual heat removal system 2, opens first
Control valve 215.
After the gaseous coolant in once through steam generator 1 flows out to the first condensing unit 21, in order to timely to straight
The moisturizing of steam generator 1 is flowed, the pipe side water for avoiding result in once through steam generator 1 is partly or entirely lost, and condenses collecting box
Liquid coolant is stored in 22, and liquid level is not less than first entrance 11, occurs for system initial operation stage to direct-flow steam
The pipe side moisturizing of device 1.Meanwhile the cooling agent condensed in collecting box 22 is not filled, inner chamber is allowed to be arranged to gas-liquid two-phase, anti-locking system is thrown
Fortune unstable stage system superpressure at initial stage.
In certain embodiments, first entrance 11, first outlet 12 are respectively positioned on the upper end of once through steam generator 1, carry out
Top water inlet, top go out steam.Or first entrance 11 is located at the lower end of once through steam generator 1, first outlet 12 is located at
The upper end of once through steam generator 1, now, it is preferable that the liquid level of the cooling agent in condensation collecting box 22 is in first entrance
Between 11 and first outlet 12.If control flow, first can be also higher than by condensing the liquid level of the cooling agent in collecting box 22
Outlet 12.
In certain embodiments, water plug 23 includes the unit 231 that draws water, and what the unit 231 that draws water included being arranged in series takes out
2311 and first reverse valve 2312 of water pump, the first reverse valve 2312 are connected with the exit end of suction pump 2311.First reverse valve
2312 cooling agents allowed in once through steam generator 1 will not reversely flow to suction pump 2311, ensure that one-way flow.
Preferably, water plug 23 includes two units 231 that draw water being arranged in parallel, the using and the reserved during operation, further
Ground, equipped with emergency power supply, it is continuing with the event of a power failure.In other embodiments, water plug 23 may also comprise multiple
The unit 231 that draws water being arranged in parallel.The unit 231 that draws water can also only include suction pump 2311, and the first reverse valve 2312 is arranged on
The downstream of water plug 23.
Further, the second control valve 24 of control pipeline switch is provided between the downstream of water plug 23 and input pipe 4,
When the first residual heat removal system 2 is closed, the first control valve 215, the second control valve 24 simultaneously close off, in the first Residual heat removal system
When system 2 starts, the first control valve 215, the second control valve 24 are opened simultaneously.
The second reverse valve 25 is provided between second control valve 24 and input pipe 4, the cooling agent allowed in once through steam generator 1
The second control valve 24, water plug 23 will not be reversely flowed to, ensure that one-way flow, the first reverse valve 2312, the second reverse valve
25 also can only set one of position.
In certain embodiments, the second condensing unit 31 includes being stored with the cooling cylinder 311 of cooling agent and is arranged on cold
The second condenser 312 in solidifying case 311, the second condenser 312 include condensation chamber and the 4th entrance 3121 connected with condensation chamber,
4th outlet 3122.4th entrance 3121 is connected by efferent duct 5 with first outlet 12, and the 4th outlet 3122 passes through input pipe 4
It is connected, is condensed after entering condenser for gaseous coolant, and be flowed into once through steam generator 1 with first entrance 11.Cooling cylinder
311 be can be set in the seawater, and the heat transfer of absorption is gone out to be radiated.
Further, the second residual heat removal system 3 also includes the moisturizing unit 32 being arranged in parallel with the second condensing unit 31,
Moisturizing unit 32 includes being stored with the water supply tank of cooling agent, and water supply tank is provided with the 5th entrance 321 and the 5th outlet 322.5th
Entrance 321 is connected by efferent duct 5 with first outlet 12, and the 5th outlet 322 passes through input below the liquid level of water supply tank
Pipe 4 is connected with first entrance 11.
After second residual heat removal system 3 starts, two stages are had：To the moisturizing stage of once through steam generator 1 and waste heat
The discharge stage.
In the moisturizing stage of once through steam generator 1, water in case is injected direct current by water supply tank by gravity through first entrance 11
The pipe side of steam generator 1, it is the pipe side moisturizing of once through steam generator 1.
Further, moisturizing unit 32 be additionally included in the 5th outlet 322 downstream set, with control from water supply tank outflow
The current-limiting apparatus 33 of the flow of cooling agent.Current-limiting apparatus 33 plays metering function, reduces moisturizing to caused by once through steam generator 1
Thermal shock.
Preferably, current-limiting apparatus 33 includes current limiting plate, and current limiting plate is provided with least one metering hole, total stream of metering hole
Logical area is less than the endoporus area of the 5th outlet 322.Current limiting plate can be limited the refill flow of once through steam generator 1,
Reduce moisturizing and thermal shock is caused to once through steam generator 1 in system start-up phase.Current-limiting apparatus 33 or regulating valve etc., root
Flow is controlled according to actual conditions.
Moisturizing unit 32 is additionally included in the 3rd control valve 34 that the downstream of current-limiting apparatus 33 is set, switched with control pipeline,
Play isolation water supply tank, when the water level of once through steam generator 1 is too high, close the 3rd control valve 34, stop water filling, prevent straight
Flow the generation that spill-over influence steam occurs for the pipe side of steam generator 1.Water supply tank is arranged to gas-liquid two-phase, anti-locking system initial operation stage
Unstable stage superpressure.
In the Residual heat removal stage, reactor waste heating once through steam generator 1 pipe side water is heated to produce steam, and steam leads to
Cross efferent duct 5 and enter the second condensing unit 31, water is condensed into the condensation chamber of the second condenser 312.Steam heat passes to
Cooling water in the condensed exterior case 311 of containment 6.Condensed water in condensation chamber is sent to direct-flow steam hair by gravity by input pipe 4
Raw device 1, forms closed cycle, brings reactor waste to the cooling water in the condensed exterior case 311 of ultimate heat sink-containment 6.It is whole
Individual circulation is passive natural circulation, relies primarily on density contrast and the condensed exterior case 311 of containment 6 and the direct current steaming of steam and water
The potential difference of vapour generator 1 provides driving force.
The downstream of second condensing unit 31 and moisturizing unit 32 is provided with the 4th control valve 35 of control pipeline switch, with control
Second condensing unit 31 and moisturizing unit 32 convey cooling agent to first entrance 11.
The upstream of second condensing unit 31 and moisturizing unit 32 controls the condensing unit 31 of efferent duct 5 and second and moisturizing unit
5th control valve 36 of the pipe switch between 32.When the second residual heat removal system 3 is closed, the control of the 4th control valve the 35, the 5th
Valve 36 processed is simultaneously closed off, and when the first residual heat removal system 2 starts, the 4th control valve 35, the 5th control valve 36 are opened simultaneously.
Further, the downstream of the 4th control valve 35 and the 3rd reverse valve 37 is provided between input pipe 4, prevents direct current from steaming
Cooling agent in vapour generator 1 reversely flows to the second residual heat removal system 3.
The present invention has advantages below：
The present invention meets the needs of reactor loses Residual heat removal under the emergency conditions of normal heat extraction path；
Present invention use is active with the emergent residual heat removal system of the passive naval reactor being combined, with reference to two kinds of heat extractions
The respective advantage of mode, is applicable that accident scope is wide, and thermal discharge efficiency is high, while improves system reliability and nuclear reactor safety, drops
Low extensive radioactivity release probability；
The present invention is not provided with auxiliary feed-water tank, system design simplifies, and saves and throws using closed cycle discharge reactor waste
Cost is provided, saves arrangement space, marine naval reactor is applicable, is advantageous to the development of marine nuclear facilities；
Reactor waste is discharged using closed cycle, without to idle discharge steam, can prevent once through steam generator 1 from dodging
Steam, avoid steam generator heat transfer deterioration, while avoid the waste of freshwater resources on ship；
The passive emergent Residual heat removal subsystem of the present invention sets restriction orifice to reduce moisturizing to once through steam generator 1
Thermal shock, device damage probability is reduced, improve equipment availability；
The active emergent Residual heat removal subsystem of the present invention sets redundancy electrodynamic pump, prevents from failing.
It is to be appreciated that above-mentioned each technical characteristic can be used in any combination and unrestricted.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (16)
- It is 1. a kind of active with the emergent residual heat removal system of the passive naval reactor being combined, it is characterised in that including direct current Steam generator（1）, the first residual heat removal system（2）, the second residual heat removal system（3）And input pipe（4）, efferent duct（5）；The once through steam generator（1）It is arranged on containment（6）It is interior, the once through steam generator（1）Enter provided with first Mouthful（11）And first outlet（12）；The input pipe（4）With the first entrance（11）Connection, the efferent duct（5）With the first outlet（12）Connection, First residual heat removal system（2）, the second residual heat removal system（3）It is arranged on the containment（6）Outside；First residual heat removal system（2）Including the first condensing unit being sequentially connected（21）, condensation collecting box（22）, draw water Device（23）, first condensing unit（21）Including second entrance（211）And second outlet（212）, the condensation collecting box （22）Including the 3rd entrance（221）With the 3rd outlet（222）, the second entrance（211）With the efferent duct（5）Connection, institute State second outlet（212）With the 3rd entrance（221）Connection, the water plug（23）Exported respectively with the described 3rd （222）And input pipe（4）Connection；Second residual heat removal system（3）Including the second condensing unit for being condensed to gaseous coolant（31）, described Two condensing units（31）Respectively with the input pipe（4）And efferent duct（5）Connection；First residual heat removal system（2）During work, through the first outlet（12）Described in the gaseous coolant of outflow enters First condensing unit（21）After condensation, through the second outlet（212）Flow into the condensation collecting box（22）It is collected, it is described Water plug（23）By the condensation collecting box（22）Interior cooling agent is by the first entrance（11）The direct current is transported to steam Vapour generator（1）It is interior；Second residual heat removal system（3）During work, through the first outlet（12）Described in the gaseous coolant of outflow enters Second condensing unit（31）After condensation, by gravity through the first entrance（11）It is transported to the once through steam generator（1）It is interior.
- 2. according to claim 1 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, first condensing unit（21）Including the first condenser, first condenser includes housing（213）With described Housing（213）The condenser pipe of interior setting（214）, the condenser pipe（214）It is connected with component cooling water, the second entrance （211）, second outlet（212）It is arranged on the housing（213）On.
- 3. it is according to claim 1 or 2 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the second entrance（211）With the efferent duct（5）Between be provided with control pipeline switch the first control valve （215）.
- 4. according to claim 1 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, the condensation collecting box（22）Liquid coolant is inside stored, and liquid level is not less than the first entrance（11）.
- 5. according to claim 1 or 4 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the first entrance（11）Positioned at the once through steam generator（1）Lower end, the first outlet（12）It is located at The once through steam generator（1）Upper end, the condensation collecting box（22）The liquid level of interior cooling agent is described first Entrance（11）With the first outlet（12）Between；Or, the first entrance（11）, first outlet（12）It is respectively positioned on the direct current Steam generator（1）Upper end.
- 6. according to claim 1 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, the water plug（23）Including the unit that draws water（231）, the unit that draws water（231）Drawn water including what is be arranged in series Pump（2311）With the first reverse valve（2312）, the first reverse valve（2312）With the suction pump（2311）Exit end connect Connect.
- 7. according to claim 6 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, the water plug（23）Including at least two units that draw water being arranged in parallel（231）.
- It is 8. active with the emergent Residual heat removal of the passive naval reactor being combined according to any one of claim 1,6,7 System, it is characterised in that the water plug（23）Downstream and the input pipe（4）Between be provided with the of control pipeline switch Two control valves（24）.
- 9. according to claim 8 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, second control valve（24）With the input pipe（4）Between be provided with the second reverse valve（25）.
- 10. according to claim 1 active with the emergent residual heat removal system of the passive naval reactor being combined, it is special Sign is, second condensing unit（31）Cooling cylinder including being stored with cooling agent（311）And it is arranged on the cooling cylinder （311）The second interior condenser（312）；Second condenser（312）The 4th entrance connected including condensation chamber and with the condensation chamber（3121）, the 4th outlet （3122）, the 4th entrance（3121）Pass through the efferent duct（5）With the first outlet（12）Connection, the 4th outlet （3122）Pass through the input pipe（4）With the first entrance（11）Connection, for gaseous coolant enter the condenser after it is cold It is solidifying, and it is flowed into the once through steam generator（1）.
- 11. according to claim 1 or 10 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, Characterized in that, second residual heat removal system（3）Also include and second condensing unit（31）The moisturizing being arranged in parallel Unit（32）, the moisturizing unit（32）Water supply tank including being stored with cooling agent, the water supply tank are provided with the 5th entrance （321）With the 5th outlet（322）；5th entrance（321）Pass through the efferent duct（5）With the first outlet（12）Connection, the 5th outlet （322）Below the liquid level of the water supply tank, and pass through the input pipe（4）With the first entrance（11）Connection.
- 12. it is according to claim 11 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the moisturizing unit（32）It is additionally included in the 5th outlet（322）Downstream set, with control from the moisturizing The current-limiting apparatus of the flow of the cooling agent of case outflow（33）.
- 13. it is according to claim 12 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the current-limiting apparatus（33）Including current limiting plate, the current limiting plate is provided with least one metering hole, the metering hole Total circulation area be less than the described 5th outlet（322）Endoporus area.
- 14. it is according to claim 12 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the moisturizing unit（32）It is additionally included in the current-limiting apparatus（33）Downstream set, with control pipeline switch 3rd control valve（34）.
- 15. it is according to claim 11 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, second condensing unit（31）With the moisturizing unit（32）Downstream be provided with control pipeline switch the 4th control Valve processed（35）, to control second condensing unit（31）With the moisturizing unit（32）To the first entrance（11）Convey cold But agent；Second condensing unit（31）With the moisturizing unit（32）Upstream control the efferent duct（5）It is cold with described second Solidifying device（31）With the moisturizing unit（32）Between pipe switch the 5th control valve（36）.
- 16. it is according to claim 15 it is active with the passive naval reactor being combined meet an urgent need residual heat removal system, its It is characterised by, the 4th control valve（35）Downstream and with the input pipe（4）Between be provided with the 3rd reverse valve（37）.
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