CN202855317U - Passive started cooling system - Google Patents
Passive started cooling system Download PDFInfo
- Publication number
- CN202855317U CN202855317U CN2012204472525U CN201220447252U CN202855317U CN 202855317 U CN202855317 U CN 202855317U CN 2012204472525 U CN2012204472525 U CN 2012204472525U CN 201220447252 U CN201220447252 U CN 201220447252U CN 202855317 U CN202855317 U CN 202855317U
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- China
- Prior art keywords
- pressure
- gravity water
- pressure vessel
- cooling system
- water supply
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- 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
Abstract
The utility model relates to a passive started cooling system. The passive started cooling system comprises a pressure vessel, a cold pipe section, a cold pipe section, a gravity water supplementing tank, a pressure balance pipeline, and an outlet injection pipeline, wherein the cold pipe section and the hot pipe section are connected with the pressure vessel, the gravity water supplementing tank is arranged at a position higher than the pressure vessel and filled with a coolant, the pressure balance pipeline is connected between the hot pipe section and the upper part of the gravity water supplementing tank, the outlet injection pipeline is connected between the lower part of the gravity water supplementing tank and the pressure vessel, and a density lock capable of maintaining the pressure of the inlet of the pressure balance pipeline and the outlet of the outlet injection pipeline balance is arranged on the outlet injection pipeline. When accident condition occurs, the temperature or pressure of a reactor primary loop has greater change, the pressure balance maintained by the density lock is broken, gravity pressure head generated due to density difference between cold water in the gravity water supplementing tank and hot water in the pressure balance pipeline can drive the coolant in the gravity water supplementing tank to enter the pressure vessel and directly cool a fuel bar and the like in the pressure vessel, so that the melting risk of a reactor core can be avoided, and the running safety and reliability of a nuclear station can be improved.
Description
Technical field
The utility model relates to the nuclear power station field, more particularly, relates to a kind of non-active startup cooling system that can be used in the nuclear power station.
Background technology
Improve constantly the construction of the nuclear power station important energy source guarantee that becomes national development gradually along with the security of the ripe nuclear power station of technology.
In pressurized-water reactor nuclear power plant, generally include pressure vessel and the cold leg that is connected with pressure vessel and heat pipe section.In order to guarantee the security under the accident conditions, pressurized-water reactor nuclear power plant has emergent Core makeup tank water charging system usually.In existing power station, the boronation water in the emergent Core makeup tank, the direct injection pipeline that generally is connected by the cold leg pipeline or with pressure vessel dipped chamber is injected into reactor-loop, and supply and the boronation function of cooling medium is provided.Yet, usually need to start Core makeup tank and pacify when annotating, need emergency power pack to start corresponding isolation valve, reverse checkvalve etc., need to rely on guard signal, emergency power pack etc., there is certain security risk.
The utility model content
The technical problems to be solved in the utility model is, a kind of non-active startup cooling system that need not to rely on emergency power pack is provided.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of non-active startup cooling system, comprise pressure vessel and the cold leg that is connected with described pressure vessel and heat pipe section; Described non-active startup cooling system also is included in the position that is higher than described pressure vessel and the gravity water supply tank be filled with cooling medium is set, is connected to the pressure-equalizing line between described heat pipe section and the described gravity water supply tank top and is connected to outlet injection pipeline between described gravity water supply tank bottom and the described pressure vessel; Described outlet injection pipeline is provided with the pressure balanced density lock of the outlet of the entrance and exit injection pipeline of keeping described pressure-equalizing line.
In non-active startup cooling system of the present utility model, described outlet injection pipeline is provided with often drives isolation valve; Described pressure-equalizing line is provided with often drives isolation valve.
In non-active startup cooling system of the present utility model, described pressure-equalizing line periphery is enclosed with heat-insulation layer.
In non-active startup cooling system of the present utility model, the outlet of described outlet injection pipeline is connected to described cold leg or directly is connected with described pressure vessel.
In non-active startup cooling system of the present utility model, described gravity water supply tank is positioned at the position of the upper cover absolute altitude that is higher than described cold leg and described pressure vessel.
In non-active startup cooling system of the present utility model, described pressure-equalizing line is connected to the top of described gravity water supply tank.
In non-active startup cooling system of the present utility model, described outlet injection pipeline is connected to the bottom of described gravity water supply tank.
In non-active startup cooling system of the present utility model, the cooling medium in the described gravity water supply tank is cold boronation water.
Enforcement the utlity model has following beneficial effect: when accident conditions, because reactor-loop temperature or pressure produce larger variation, the pressure equilibrium of being kept by density lock is broken, the density difference of hot water in cold water in the gravity water supply tank and the pressure-equalizing line and cooling medium that the gravity head that produces drives in the gravity water supply tank enters pressure vessel, fuel rod in the pressure vessel etc. is directly cooled off, avoid producing the risk of the melting of reactor core, improved safety in operation, the reliability of nuclear power station.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of an embodiment of the non-active startup cooling system of the utility model.
Embodiment
As shown in Figure 1, be an embodiment of non-active startup cooling system of the present utility model, can be used in the pressurized-water reactor nuclear power plant.
This non-active startup cooling system comprises pressure vessel 11, cold leg 12, heat pipe section 13, gravity water supply tank 14, pressure-equalizing line 15, outlet injection pipeline 16 etc.
This cold leg 12 is connected with the heat pipe section and is connected with pressure vessel 11 respectively, form reactor-loop, under non-accident conditions, cooling medium is by cold leg 12, feed pressure container 11 cools off reactor core, and the cooling medium after the heat interchange flows out by heat pipe section 13, and with secondary circuit generation heat interchange, thereby the heat in the reactor is taken out of.
As shown in the figure, the position that this gravity water supply tank 14 arranges is higher than the position of pressure vessel 11, thereby can utilize gravity that the cooling medium in the gravity water supply tank 14 is injected in the pressure vessel 11.In the present embodiment, the position of gravity water supply tank 14 is higher than the absolute altitude position of the upper cover of pressure vessel 11, and certainly, the position of gravity water supply tank 14 can be adjusted installation as required.
In this gravity water supply tank 14, be filled with boronation water, under accident conditions, for reactor-loop advances cooling medium supply and boronation function.This gravity water supply tank 14 can be arranged in the containment vessel of nuclear power station, and the periphery of gravity water supply tank 14 do not need to arrange heat-insulation layer, thereby so that the temperature of the boronation water in the gravity water supply tank 14 is consistent with atmospheric temperature in the containment all the time.Understandable, the cooling medium of gravity water supply tank 14 interior fillings can also be other various cooling mediums.
This pressure-equalizing line 15 is connected between heat pipe section 13 and gravity water supply tank 14 tops, as shown in the figure, the top that this pressure-equalizing line 15 is connected to pressure vessel 11 (certainly, can be arranged on as required the optional position, top of pressure vessel 11), and be provided with at pressure-equalizing line 15 and often drive isolation valve 17, thereby keep and the reactor-loop pressure equilibrium, in the time of can preventing the injection beginning water hammer occurs, improve Systems balanth.
Further, this pressure-equalizing line 15 also is enclosed with heat-insulation layer, to guarantee in the pipeline as hot water; Because gravity water supply tank 14 and outlet injection pipeline 16 do not arrange insulation, therefore are full of cold boron water.
This outlet injection pipeline 16 is connected to the bottom of gravity water supply tank 14, and be connected with the direct injection pipeline of pressure vessel 11, in the present embodiment, the bottom that this outlet injection pipeline 16 is connected to gravity water supply tank 14 (certainly, also can be arranged on the optional position of gravity water supply tank 14 bottoms) so that the cooling medium in the gravity water supply tank 14 is better discharged.The outlet of this outlet injection pipeline 16 is connected to cold leg 12, so that under accident conditions, be that pressure vessel 11 injects cooling medium by cold leg 12.Understandable, the outlet of this outlet injection pipeline 16 also can be connected directly to the peace of pressure vessel 11 and annotate pipeline, directly pressure vessel 11 is pacified notes.
Be provided with on this outlet injection pipeline 16 and often open isolation valve 18 and density lock 19.Keep the pressure equilibrium of system gateway by this density lock 19, offset because the poor density difference impact that causes of the pressure differential of cold leg 12, heat pipe section 13 and gravity water supply tank 14 and a loop temperature.During reactor start-up, by means of density lock 19 Main Coolant of cold leg and cooling medium in the gravity water supply tank are separated; During the reactor operation, occur stable hot cold interface in the density lock, make the Natural Circulation route of cold fluid and hot fluid keep off working state, the pressure of the outlet of maintenance outlet injection pipeline 16 and the porch of pressure-equalizing line 15.In case pernicious transition or accident occur, this pressure equilibrium just suddenly disappears, thereby makes the cooling medium of gravity water supply tank 14 rely on Natural Circulation to enter pressure vessel 11 by cold leg 12, makes reactor shutdown and the decay heat of uninterrupted derivation reactor core.
When nuclear power station works, often drive isolation valve 18 and Chang Kai isolation valve 17 remains on open mode, and, kept the pressure equilibrium of system by density lock 19, the cooling medium of gravity water supply tank 14 can injection pressure container 11.
When accident conditions occurs, because reactor-loop temperature or pressure produce larger variation, the pressure equilibrium of being kept by density lock 19 is broken, the density difference of hot water in cold water in the gravity water supply tank 14 and the pressure-equalizing line 15 and gravity head that produces drives the boron water in the gravity water supply tank 14, enter pressure vessel 11, reactor-loop is carried out supply and the boronation of cooling medium, fuel rod in the pressure vessel 11 etc. is directly cooled off, avoid producing the risk of the melting of reactor core, improved safety in operation, the reliability of nuclear power station.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. a non-active startup cooling system comprises pressure vessel and the cold leg that is connected with described pressure vessel and heat pipe section; It is characterized in that, described non-active startup cooling system also is included in the position that is higher than described pressure vessel and the gravity water supply tank be filled with cooling medium is set, is connected to the pressure-equalizing line between described heat pipe section and the described gravity water supply tank top and is connected to outlet injection pipeline between described gravity water supply tank bottom and the described pressure vessel; Described outlet injection pipeline is provided with the pressure balanced density lock of the outlet of the entrance and exit injection pipeline of keeping described pressure-equalizing line.
2. non-active startup cooling system according to claim 1 is characterized in that, described outlet injection pipeline is provided with often drives isolation valve; Described pressure-equalizing line is provided with often drives isolation valve.
3. non-active startup cooling system according to claim 1 is characterized in that, described pressure-equalizing line periphery is enclosed with heat-insulation layer.
4. each described non-active startup cooling system is characterized in that according to claim 1-3, and the outlet of described outlet injection pipeline is connected to described cold leg or directly is connected with described pressure vessel.
5. non-active startup cooling system according to claim 4 is characterized in that, described gravity water supply tank is positioned at the position of the upper cover absolute altitude that is higher than described cold leg and described pressure vessel.
6. non-active startup cooling system according to claim 4 is characterized in that, described pressure-equalizing line is connected to the top of described gravity water supply tank.
7. non-active startup cooling system according to claim 6 is characterized in that, described outlet injection pipeline is connected to the bottom of described gravity water supply tank.
8. non-active startup cooling system according to claim 7 is characterized in that, the cooling medium in the described gravity water supply tank is cold boronation water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204472525U CN202855317U (en) | 2012-09-04 | 2012-09-04 | Passive started cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204472525U CN202855317U (en) | 2012-09-04 | 2012-09-04 | Passive started cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202855317U true CN202855317U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204472525U Expired - Lifetime CN202855317U (en) | 2012-09-04 | 2012-09-04 | Passive started cooling system |
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| CN (1) | CN202855317U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361914A (en) * | 2014-11-19 | 2015-02-18 | 中科华核电技术研究院有限公司 | Passive safe cooling system |
| CN105070329A (en) * | 2015-08-31 | 2015-11-18 | 上海核工程研究设计院 | Nuclear power station secondary side passive residual heat removal system |
| CN107210071A (en) * | 2014-12-04 | 2017-09-26 | 原子能技术科学研究设计院股份公司 | Passive heat removal system inside containment |
| CN110354645A (en) * | 2019-06-21 | 2019-10-22 | 中广核工程有限公司 | A kind of passive online liquid supply device of containment filtration exhaust system and method |
| WO2021109622A1 (en) * | 2019-12-04 | 2021-06-10 | 上海核工程研究设计院有限公司 | Integrated passive reactor system |
-
2012
- 2012-09-04 CN CN2012204472525U patent/CN202855317U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361914A (en) * | 2014-11-19 | 2015-02-18 | 中科华核电技术研究院有限公司 | Passive safe cooling system |
| CN107210071A (en) * | 2014-12-04 | 2017-09-26 | 原子能技术科学研究设计院股份公司 | Passive heat removal system inside containment |
| CN107210071B (en) * | 2014-12-04 | 2019-06-21 | 原子能技术科学研究设计院股份公司 | Passive heat removal system inside containment |
| CN105070329A (en) * | 2015-08-31 | 2015-11-18 | 上海核工程研究设计院 | Nuclear power station secondary side passive residual heat removal system |
| CN110354645A (en) * | 2019-06-21 | 2019-10-22 | 中广核工程有限公司 | A kind of passive online liquid supply device of containment filtration exhaust system and method |
| CN110354645B (en) * | 2019-06-21 | 2022-06-07 | 中广核工程有限公司 | Passive online liquid supplementing device and method for containment filtering and discharging system |
| WO2021109622A1 (en) * | 2019-12-04 | 2021-06-10 | 上海核工程研究设计院有限公司 | Integrated passive reactor system |
| GB2593389A (en) * | 2019-12-04 | 2021-09-22 | Shanghai Nuclear Eng Res & Design Inst Co Ltd | Integrated passive reactor system |
| US11894151B2 (en) | 2019-12-04 | 2024-02-06 | Shanghai Nuclear Engineering Research & Design Institute Co., Ltd. | Integrated reactor system having passive removal of residual heat |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee after: CHINA GENERAL NUCLEAR POWER Corp. Address before: 518000 Guangdong, Futian District, Yitian Road, building A, block, building on the whole floor of A1301-1320 13 Patentee before: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA GUANGDONG NUCLEAR POWER GROUP Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130403 |
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| CX01 | Expiry of patent term |