CN203026166U - High-pressure safe injection system for nuclear power stations - Google Patents
High-pressure safe injection system for nuclear power stations Download PDFInfo
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- CN203026166U CN203026166U CN2012206803132U CN201220680313U CN203026166U CN 203026166 U CN203026166 U CN 203026166U CN 2012206803132 U CN2012206803132 U CN 2012206803132U CN 201220680313 U CN201220680313 U CN 201220680313U CN 203026166 U CN203026166 U CN 203026166U
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- boric acid
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- filling line
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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
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Abstract
The utility model relates to a high-pressure safe injection system for nuclear power stations, which is configured on multiple loops of a loop system of a reactor. The high-pressure safe injection system comprises at least a boric acid injection unit and at least a coolant injection unit, wherein the boric acid injection unit comprises a concentrated boric acid injection box and a concentrated boric acid injection pipeline, one end of the concentrated boric acid injection pipeline is connected with the concentrated boric acid injection box, and the other end of the concentrated boric acid injection pipeline penetrates into a containment vessel and then is connected to a cold tube section of a loop of a loop system of the reactor; the coolant injection unit comprises a water source and a coolant injection pipeline, and the coolant injection pipeline is connected with the water source; the coolant injection pipeline comprises a cold tube section injection pipeline and a heat tube section injection pipeline which are connected in parallel; the cold tube section injection pipeline penetrates into the containment vessel and then is connected to a cold tube section of a loop of a loop system of the reactor; and the heat tube section injection pipeline penetrates into the containment vessel and then is connected to a heat tube section of a loop of a loop system of the reactor. According to the utility model, multiple pipelines are not mutually interfered, thereby facilitating flow control; and the high-pressure safe injection system disclosed by the utility model has high security.
Description
Technical field
The present invention relates to field of pressurized water reactor nuclear, be specifically related to a kind of high-pressure safe injection system for pressurized-water reactor nuclear power plant.
Background technology
In pressurized-water reactor nuclear power plant, safety injection system is carried out the emergent refrigerating function of reactor core when Main Coolant pipeline or main steam line rupture accident occur, be one of important engineered safeguards features.In design in the past, High-pressure injection system utilize fill on cvcs three platforms pump wherein two as safety injection pump.The injection flow of every safety injection pump all passes through a female manifold General Logistics Department again to hot and cold section distribution of each loop, and such design will affect the flow that other inject pipelines when a certain is injected pipeline and break down.1 dense boric acid is set in High-pressure injection system injects case, only have one to inject pipeline by dense boric acid injection case, concentrated boric acid solution is injected a loop, keep reactor core at subcritical state.If this pipeline failure, this function can't realize, the emergent cooling power reduction of safety injection system.
Summary of the invention
The technical matters that will solve of the present invention is to provide a kind of nuclear plant safety injecting systems, and it can inject chilled water to reactor-loop independently, improves system's reliability of operation, and the intensified safety injecting systems is carried out the emergent cooling ability of reactor core; And inject series under the operating mode of non-security injecting systems action by the dense boric acid that arranges separately, and BAS is injected reactor core, provide enough negative reactivity to realize shutdown.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, a kind of nuclear power station high-pressure safe injection system, and it is configured on several loops of reactor-loop system, comprises that at least one boric acid injects the unit and at least one cooling medium injects the unit;
Described boric acid injects the unit and comprises that dense boric acid injects the dense boric acid filling line that is connected of case, an end and described dense boric acid injection case, and the other end of described dense boric acid filling line penetrates the cold leg that containment is connected to a loop of reactor-loop system;
Described cooling medium injects the unit and comprises a water source, the cooling medium filling line that is connected with described water source; Described cooling medium filling line comprises cold leg filling line and heat pipe section filling line in parallel; Described cold leg filling line penetrates containment and is connected on the cold leg of a loop of reactor-loop system; Described heat pipe section filling line penetrates containment and is connected on the heat pipe section of a loop of reactor-loop.
Described water source can be material-changing water tank in containment.
Be provided with the boric acid injection pump on described dense boric acid filling line; Be provided with high-pressure safety injection pump on described cooling medium filling line.
Described reactor-loop system comprises 3 loops.
Described 3 loop configuration have 4 cooling mediums to inject the unit, and wherein, 2 cooling mediums inject on first loop and second loop that the unit is connected to 3 loops of described reactor independently; The cold leg filling line that other 2 cooling mediums inject the unit is connected to the cold leg on the 3rd loop of 3 loops of described reactor in the lump, and the heat pipe section filling line that described other 2 cooling mediums inject the unit is connected to the heat pipe section on the 3rd loop of 3 loops of described reactor in the lump.
3 loop configuration of reactor have 2 boric acid to inject the unit, and the cold leg of described 3 loops is by female UNICOM of managing; The dense boric acid filling line that described 2 boric acid inject the unit all is connected on described female pipe; The dense boric acid filling line that described 2 boric acid inject the unit is provided with isolation valve by a connecting pipeline UNICOM on described UNICOM pipeline.
Beneficial effect of the present invention:
(1) many high-pressure safety injection pipelines to hot and cold section injection of a plurality of loops of a circuit system, do not interfere with each other between many pipelines respectively, are convenient to flow regulation;
(2) annotated in peace by dense boric acid injected system independently and inject dense boric acid to a loop after signal sends, this function does not rely on high-pressure safety injection pump and relevant operation of injecting pipeline;
(3) after sending shutdown signal, and control rod is failed lower insert and is caused automatically starting the boric acid injection pump can not shutdown the time, injects reactor core and introduces enough negative reactivities to realize shutdown thereby two boric acid are injected high concentration boron water in casees.
Description of drawings
Fig. 1 is the schematic diagram of a loop in nuclear power plant reactor one circuit system;
Fig. 2 is the schematic diagram of a kind of nuclear power station high-pressure safe injection of the present invention system;
Fig. 3 is the partial schematic diagram A that is applied to three loop reaction heaps of a kind of nuclear power station high-pressure safe injection of the present invention system;
Fig. 4 is the partial schematic diagram B that is applied to three loop reaction heaps of a kind of nuclear power station high-pressure safe injection of the present invention system;
Fig. 5 is the partial schematic diagram C that is applied to three loop reaction heaps of a kind of nuclear power station high-pressure safe injection of the present invention system;
In figure: 1-reactor core, 2-pressure vessel, 3-steam generator, 4-pump, the 5-loop, 6-cooling medium filling line, the dense boric acid filling line of 7-, the dense boric acid of 8-injects case, 9-cold leg filling line, 10-heat pipe section filling line, the 11-containment, 12-boric acid injection pump, 13-high-pressure safety injection pump, the 14-water source, 15-boric acid injects the unit, and the 16-cooling medium injects the unit, the 17-isolation valve, 18-connecting pipeline, the female pipe of 19-.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.
Nuclear power plant reactor comprises a circuit system, and a described circuit system comprises 3 loops 5, expresses one of them loop 5 in Fig. 1; Each loop includes heat pipe section 502 and cold leg 501; Cooling medium enters pressure vessel 2 by pump 4 by cold leg 501 and from reactor core 1 draw heat, cooling medium after draw heat leaves pressure vessel 2 by heat pipe section 502 process steam generator 3 release heat, thereby the cooling medium after release heat is got back to cold leg 501 and then again entered pressure vessel 2 realization circulations;
As shown in Figure 2, a kind of nuclear power station high-pressure safe injection of the present invention system comprises that at least one boric acid injects unit 15 and at least one cooling medium injects unit 16;
Described boric acid injects unit 15 and comprises that dense boric acid injects the dense boric acid filling line 7 that case 8, an end are connected with the bottom of described dense boric acid injection case 8, and the other end of described dense boric acid filling line 7 penetrates by penetration piece the cold leg 501 that containment 11 is connected to a loop 5 of reactor-loop system; Be provided with boric acid injection pump 12 on described dense boric acid filling line 7;
Described cooling medium injects unit 16 and comprises a water source 14, the cooling medium filling line 6 that is connected with described water source 14; Described cooling medium filling line 6 comprises cold leg filling line 9 and heat pipe section filling line 10 in parallel; Described cold leg filling line 9 penetrates containment 11 by penetration piece and is connected on the cold leg 501 of a loop 5 of reactor-loop; Described heat pipe section filling line 10 penetrates containment 11 by penetration piece and is connected on the heat pipe section 502 of a loop 5 of reactor-loop; Be provided with high-pressure safety injection pump 13 on described cooling medium filling line 6; Described water source 14 can be the interior material-changing water tank of containment 11;
To shown in Figure 4,3 loops 5 of reactor dispose 4 cooling mediums and inject unit 16 as Fig. 3, and wherein, 2 cooling mediums inject unit 16 and are connected to independently on first and second of 3 loops 5 of described reactor; The cold leg filling line 9 that other 2 cooling mediums inject unit 16 is connected to the cold leg 501 on the 3rd of 3 loops 5 of described reactor in the lump, and the heat pipe section filling line 10 that described other 2 cooling mediums inject unit 16 is connected to the heat pipe section 502 on the 3rd of 3 loops 5 of described reactor in the lump.
As shown in Figure 5,3 loops 5 of reactor dispose 2 boric acid and inject unit 15, and the cold leg 501 of described 3 loops 5 is by female 19 UNICOMs of managing; The dense boric acid filling line 7 that described 2 boric acid inject unit 15 all is connected on described female pipe 19; Described 2 boric acid inject the line segments between high-pressure safety injection pump 13 and dense boric acid case 8 on the dense boric acid filling line 7 of unit 15 and pass through connecting pipeline 18 UNICOMs, are provided with isolation valve 17 on described UNICOM pipeline 18.
The specific works engineering:
(1) safety injection process
Annotate just action below execution immediately of signal once receiving peace:
A) 4 cooling mediums of startup inject 4 high-pressure safety injection pumps on unit 16;
B) start two boric acid injection pump A and B;
In the peace notes stage, reactor coolant pressure descends rapidly, boron water is injected a circuit system a loop 5 cold leg 501 and enter reactor core.
The input of high-pressure safety injection pump 13 and boric acid injection pump 12 makes reactor pressure vessel water-filling and flood again reactor core again.
In the long-term peace notes stage, safety injection system still keeps to the concurrently injected configuration of cold and hot pipeline section, until:
A) complete Core cooling;
B) environmental baseline (pressure, temperature and radioactive level) allows to enter containment.
(2) dense boric acid injects shutdown
In the needs shutdown and control rod when breaking down, boric acid injects subsystem to be used as the second cover shutdown.After reactor protection system is sent shutdown signal; and control rod is failed lower insert and is caused can not shutdown the time; logical process result according to shutdown signal and power range neutron fluence rate signal; automatically start boric acid injection pump 12, thereby the high concentration boron water injection reactor core that two boric acid inject in case 8 is introduced enough negative reactivities to realize shutdown.If one of them boric acid injects unit 15 faults, can open the isolation valve 17 on connecting pipeline 18, utilize intact boric acid to inject unit 15 and high concentration of boric acid solution is injected the cold leg 501 of 3 loops of a circuit system, realize the shutdown function.
Claims (6)
1. nuclear power station high-pressure safe injection system, it is configured on several loops of reactor-loop system, it is characterized in that: comprise that at least one boric acid injects the unit and at least one cooling medium injects the unit;
Described boric acid injects the unit and comprises that dense boric acid injects the dense boric acid filling line that is connected of case, an end and described dense boric acid injection case, and the other end of described dense boric acid filling line penetrates the cold leg that containment is connected to a loop of reactor-loop system;
Described cooling medium injects the unit and comprises a water source, the cooling medium filling line that is connected with described water source; Described cooling medium filling line comprises cold leg filling line and heat pipe section filling line in parallel; Described cold leg filling line penetrates containment and is connected on the cold leg of a loop of reactor-loop system; Described heat pipe section filling line penetrates containment and is connected on the heat pipe section of a loop of reactor-loop.
2. according to high-pressure safe injection claimed in claim 1 system, it is characterized in that: described water source can be material-changing water tank in containment.
3. according to high-pressure safe injection claimed in claim 1 system, it is characterized in that: be provided with the boric acid injection pump on described dense boric acid filling line; Be provided with high-pressure safety injection pump on described cooling medium filling line.
4. according to high-pressure safe injection claimed in claim 1 system, it is characterized in that: described reactor-loop system comprises 3 loops.
5. according to high-pressure safe injection claimed in claim 4 system, it is characterized in that: described 3 loop configuration have 4 cooling mediums to inject the unit, wherein, 2 cooling mediums inject on first loop and second loop that the unit is connected to 3 loops of described reactor independently; The cold leg filling line that other 2 cooling mediums inject the unit is connected to the cold leg on the 3rd loop of 3 loops of described reactor in the lump, and the heat pipe section filling line that described other 2 cooling mediums inject the unit is connected to the heat pipe section on the 3rd loop of 3 loops of described reactor in the lump.
6. according to high-pressure safe injection claimed in claim 4 system, it is characterized in that: 3 loop configuration of reactor have 2 boric acid to inject the unit, and the cold leg of described 3 loops is by a female pipe UNICOM; The dense boric acid filling line that described 2 boric acid inject the unit all is connected on described female pipe; The dense boric acid filling line that described 2 boric acid inject the unit is provided with isolation valve by a connecting pipeline UNICOM on described UNICOM pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206803132U CN203026166U (en) | 2012-12-11 | 2012-12-11 | High-pressure safe injection system for nuclear power stations |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206803132U CN203026166U (en) | 2012-12-11 | 2012-12-11 | High-pressure safe injection system for nuclear power stations |
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| CN203026166U true CN203026166U (en) | 2013-06-26 |
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| CN2012206803132U Expired - Lifetime CN203026166U (en) | 2012-12-11 | 2012-12-11 | High-pressure safe injection system for nuclear power stations |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871506A (en) * | 2012-12-11 | 2014-06-18 | 中国核动力研究设计院 | High-pressure safe injection system for nuclear power station |
| CN105244062A (en) * | 2014-07-09 | 2016-01-13 | 国核华清（北京）核电技术研发中心有限公司 | Passive pressure accumulation safety injection system and passive pressure accumulation safety injection method |
-
2012
- 2012-12-11 CN CN2012206803132U patent/CN203026166U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103871506A (en) * | 2012-12-11 | 2014-06-18 | 中国核动力研究设计院 | High-pressure safe injection system for nuclear power station |
| WO2014090106A1 (en) * | 2012-12-11 | 2014-06-19 | 中国核动力研究设计院 | High-pressure safe injection system for nuclear power stations |
| GB2523949A (en) * | 2012-12-11 | 2015-09-09 | Nuclear Power Inst China | High-pressure safe injection system for nuclear power stations |
| CN103871506B (en) * | 2012-12-11 | 2016-12-21 | 中国核动力研究设计院 | A kind of nuclear power station high-pressure safe injection system |
| GB2523949B (en) * | 2012-12-11 | 2020-07-01 | Nuclear Power Inst China | High-pressure safe injection system for nuclear power stations |
| CN105244062A (en) * | 2014-07-09 | 2016-01-13 | 国核华清（北京）核电技术研发中心有限公司 | Passive pressure accumulation safety injection system and passive pressure accumulation safety injection method |
| CN105244062B (en) * | 2014-07-09 | 2017-07-14 | 国核华清（北京）核电技术研发中心有限公司 | Passive pressure accumulation safety injection system and passive pressure accumulation pacify injecting method |
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