CN104021822A - Passive containment spray and heat removal system - Google Patents
Passive containment spray and heat removal system Download PDFInfo
- Publication number
- CN104021822A CN104021822A CN201410200715.1A CN201410200715A CN104021822A CN 104021822 A CN104021822 A CN 104021822A CN 201410200715 A CN201410200715 A CN 201410200715A CN 104021822 A CN104021822 A CN 104021822A
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- containment
- collector
- heat
- spray
- pressure
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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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- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention belongs to the technology of a nuclear power design and in particular relates to a passive containment spray and heat removal system. The passive containment spray and heat removal system structurally comprises a plurality of pressure accumulating water tanks outside a containment, wherein a water outlet pipe of each pressure accumulating water tank is connected to a collecting pipe, and the collecting pipe is connected with a spray ring pipe in the containment through a containment penetration piece; an electric isolation valve is arranged on the collecting pipe and outside the containment, and a check valve is arranged on the collecting pipe and in the containment. Under the condition that a serious accident occurs, the passive containment spray and heat removal system can provide spray flow into the containment, thereby effectively lowering the temperature and pressure of the containment, and ensuring that the temperature and pressure in the containment are within an acceptable range within 72 hours. The passive containment spray and heat removal system also can discharge gas in the containment into the steel water tanks, lowers the temperature and pressure in the containment to some extent through the heat exchange of the outer surfaces of the water tanks and external air, and keeps the containment integrated.
Description
Technical field
The invention belongs to nuclear power designing technique, be specifically related to a kind of non-passive safety shell spray and heat-extraction system.
Background technology
What the design of npp safety shell spray system adopted at present is active design, and after causing the accident that containment pressure and temperature rises (loss of-coolant accident (LOCA) or secondary circuit line fracture accident), active containment spray system puts into operation.Under design basis accident, active containment spray system can be limited in the pressure and temperature of containment in limiting design value, thereby maintains the integrality of containment.
The design of active containment spray system for be design basis accident, and under major accident operating mode, whether the heat extraction of containment effective, for the impact of damage sequence, is very large.In nuclear power plant, occur after the relevant accidents such as station blackout, active containment spray system fault, active containment spray system will lose efficacy, if can not derive in time the heat in containment, containment likely lost efficacy because of over-temp and over-pressure, caused radioactivity to discharge to environment.
Summary of the invention
The object of the present invention is to provide a kind of non-passive safety shell spray and heat-extraction system, decrease temperature and pressure for containment under nuclear power plant's beyond design basis accident and major accident operating mode, and remove the radioactive products such as air-borne particle or elemental iodine, reduce the radioactivity of atmosphere in containment.
Technical scheme of the present invention is as follows: a kind of non-passive safety shell spray and heat-extraction system, comprise several pressure accumulation water tanks that are arranged on outside containment, the rising pipe of pressure accumulation water tank is connected to collector, collector is connected with the spraying ring pipe in containment by containment penetration, on collector outside containment, be provided with electronic isolation valve, the collector in containment is provided with non-return valve.
Further, non-passive safety shell spray as above and heat-extraction system, wherein, several described pressure accumulation water tanks are divided into two series that supply water, and the serial pressure accumulation water tank of same water supply is connected to a collector.
Further, non-passive safety shell spray as above and heat-extraction system, wherein, supply water and be provided with associated line between serial collector at two, and described associated line is provided with isolation valve.
Further, non-passive safety shell spray as above and heat-extraction system, wherein, be provided with bypass line on the collector in containment, and the two ends of described bypass line lay respectively at the both sides of collector upper check valve, are provided with isolation valve on bypass line.
Further, non-passive safety shell spray as above and heat-extraction system, wherein, described pressure accumulation water tank is nitrogen pressurization water tank, adopt horizontal pressure-bearing steel design, pressure accumulation water tank is provided with device for pressure measurement, radioactivity survey device, nitrogen pressurized pipeline and moisturizing pipeline.
Further, non-passive safety shell spray as above and heat-extraction system, wherein, after in two described serial pressure accumulation water tanks that supply water, total water loading amount meets accident, 72 hours inner containment temperature and pressures are no more than acceptable limit value requirement.
Beneficial effect of the present invention is as follows: technical scheme provided by the present invention can be in the situation that major accident occurs, in containment, provide spray flow, effectively reduce the temperature and pressure of containment, in 72 hours, guarantee in containment that temperature and pressure within the acceptable range.After 72 hours, suppose that active containment spray system (or other system) recovers availability, can discharge for a long time the heat in containment, keep the integrality of containment; Suppose under extreme case, containment heat extraction means active after 72 hours are not also recovered, and containment internal pressure is also raising, also gas in containment can be discharged to steel water tank, by the heat exchange of water tank outside surface and outside air, reduce to a certain extent the temperature and pressure in containment, keep the integrality of containment.In sum, to reduce the temperature and pressure in containment after for major accident be reliable and effectively in the present invention.
Accompanying drawing explanation
Fig. 1 is non-passive safety shell spray and heat-extraction system general flow chart;
Fig. 2 is that non-passive safety shell spray is arranged sketch with heat-extraction system.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The invention provides a kind of non-passive safety shell spray and heat-extraction system, comprise several pressure accumulation water tanks that are arranged on outside containment, pressure accumulation water tank is connected to a collector, collector is connected with the spraying ring pipe in containment by containment penetration, on collector outside containment, be provided with electronic isolation valve, the collector in containment is provided with non-return valve.Under accident conditions, non-passive safety shell spray relies on pressure to inject in containment in the water of pressure accumulation water tank with heat-extraction system, by the shower nozzle on spraying ring pipe, water smoke shape is sprayed, carry out abundant heat exchange with gas in containment, thereby the temperature and pressure in reduction containment, guarantees in containment that in 72 hours temperature and pressure within the acceptable range; And by shower water, radioaerosol in containment is settled down, reduce the radioactivity in containment atmosphere.After 72 hours, rely on active containment spray system (or other system) to discharge for a long time the heat in containment, guarantee the integrality of containment.
Embodiment
In the present embodiment, non-passive safety shell spray arranges two series that supply water with heat-extraction system, each series mainly comprises 3 pressure accumulation water tanks (A series C1-C3, B series D1-D3), the normal electronic isolation valve a closing (A series H1, B series H2), a non-return valve (A series J1, B series J2), spraying ring pipe and shower nozzle (A series K1, B series K2), bypass line isolation valve (A series I1, B series I2).Fig. 1 is shown in by system flow sketch, and Fig. 2 is shown in by the layout sketch of system.
3 water tanks of each series that supplies water connect by a collector, this root collector is connected with spraying ring pipe by containment penetration, collector is provided with an electronic isolation valve outward at containment, is provided with a non-return valve, as a part for Containment Isolation System in containment.
Water tank is the pressure accumulation water tank of nitrogen pressurization, and nitrogen pressure meets under accident conditions the water of water tank is all injected to the requirement in containment; The total water loading amount of water tank is by calculative determination, meet accident after 72 hours inner containment temperature, pressures be no more than acceptable limit value.Water tank adopts horizontal pressure-bearing steel design, is arranged in the annular building thing M of containment shell, is provided with device for pressure measurement, radioactivity survey device, nitrogen pressurized pipeline and moisturizing pipeline.
Spraying ring pipe and shower nozzle share spraying ring pipe and the shower nozzle of active containment spray system, do not arrange in addition.
When the normal operation of nuclear power plant and maintenance, system configuration water circulating pump and dosing measure, prevent in water tank that microbial growth and water quality reduce.
Because this system is used for tackling beyond design basis accident, needn't meet single failure criteria.Power system capacity configuration is 2 * 50%, has associated line and isolation valve G between two series, to its water yield is injected in containment by another series in an obsolete situation of series.
After there is major accident, when containment internal pressure is high, when containment spray system is unavailable, the outer normal electronic isolation valve H1 in pass of the containment of series A accepts the start signal from master-control room, and series A injects water and sprays in containment; After series A Water in Water Tank is finished, open the outer normal electronic isolation valve H2 of closing of containment of serial B, serial B puts into operation.After 72 hours, start active containment spray system (or other active means), containment is carried out to long-term heat extraction.
The layout of water tank has been considered the needs of its surface with cross-ventilation heat exchange.Under extreme case, if containment heat extraction means active after 72 hours are not also recovered, and containment internal pressure is also raising, can open non-return valve (J1 in the containment of non-passive safety shell spray system according to Severe accident management rules, J2) bypass line isolation valve (I1, I2), High Temperature High Pressure air in containment is excreted in water tank, by gas in the heat exchange cooling water tank of steel water tank outside surface and outside air, and gradually with containment in gas form convection heat transfer, to reduce the temperature and pressure in containment.At this moment, water tank is equivalent to a part for containment sealing barrier, should guarantee that the sealing of water tank is not damaged; If leaking appears in water tank, isolation valve outside closed safe shell.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of the claims in the present invention and equivalent technology thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (6)
1. a non-passive safety shell sprays and heat-extraction system, it is characterized in that: comprise several pressure accumulation water tanks that are arranged on outside containment, the rising pipe of pressure accumulation water tank is connected to collector, collector is connected with the spraying ring pipe in containment by containment penetration, on collector outside containment, be provided with electronic isolation valve, the collector in containment is provided with non-return valve.
2. non-passive safety shell spray as claimed in claim 1 and heat-extraction system, is characterized in that: several described pressure accumulation water tanks are divided into two series that supply water, and the serial pressure accumulation water tank of same water supply is connected to a collector.
3. non-passive safety shell spray as claimed in claim 2 and heat-extraction system, is characterized in that: at two, supply water and be provided with associated line between serial collector, described associated line is provided with isolation valve.
4. the non-passive safety shell as described in any one in claim 1-3 sprays and heat-extraction system, it is characterized in that: on the collector in containment, be provided with bypass line, the two ends of described bypass line lay respectively at the both sides of collector upper check valve, are provided with isolation valve on bypass line.
5. non-passive safety shell as claimed in claim 4 sprays and heat-extraction system, it is characterized in that: described pressure accumulation water tank is nitrogen pressurization water tank, adopt horizontal pressure-bearing steel design, pressure accumulation water tank is provided with device for pressure measurement, radioactivity survey device, nitrogen pressurized pipeline and moisturizing pipeline.
6. non-passive safety shell spray as claimed in claim 2 and heat-extraction system, is characterized in that: after in two described serial pressure accumulation water tanks that supply water, total water loading amount meets accident, 72 hours inner containment temperature and pressures are no more than acceptable limit value requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200715.1A CN104021822B (en) | 2014-05-13 | A kind of passive containment spray and heat-extraction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200715.1A CN104021822B (en) | 2014-05-13 | A kind of passive containment spray and heat-extraction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104021822A true CN104021822A (en) | 2014-09-03 |
| CN104021822B CN104021822B (en) | 2016-11-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808701A (en) * | 2017-10-30 | 2018-03-16 | 上海核工程研究设计院有限公司 | Spray and shell wall heat-extraction system in a kind of passive containment |
| CN108511090A (en) * | 2018-03-08 | 2018-09-07 | 中国核电工程有限公司 | A kind of cooling water tank component of nuclear power plant's secondary side passive cooling system |
| CN110459334A (en) * | 2019-07-12 | 2019-11-15 | 华北电力大学 | A kind of presurized water reactor containment cooling system multifunction experiment apparatus and its experimental method |
| WO2024103444A1 (en) * | 2022-11-17 | 2024-05-23 | 中国核电工程有限公司 | Passive spraying system for aerosol removal in nuclear power plant, and containment system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102194533A (en) * | 2011-05-09 | 2011-09-21 | 中科华核电技术研究院有限公司 | Reactor safety system |
| CN102426864A (en) * | 2011-12-12 | 2012-04-25 | 曾祥炜 | Passive emergency cooling system for severe accident in reactor |
| CN103017814A (en) * | 2012-12-10 | 2013-04-03 | 中国船舶重工集团公司第七一八研究所 | Hydrogen eliminating test system with safety protection function |
| CN103489490A (en) * | 2012-06-13 | 2014-01-01 | 中国核动力研究设计院 | Passive containment vessel spraying device |
| JP2014010113A (en) * | 2012-07-02 | 2014-01-20 | Mitsubishi Heavy Ind Ltd | Emergency core cooling system of an atomic power plant |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102194533A (en) * | 2011-05-09 | 2011-09-21 | 中科华核电技术研究院有限公司 | Reactor safety system |
| CN102426864A (en) * | 2011-12-12 | 2012-04-25 | 曾祥炜 | Passive emergency cooling system for severe accident in reactor |
| CN103489490A (en) * | 2012-06-13 | 2014-01-01 | 中国核动力研究设计院 | Passive containment vessel spraying device |
| JP2014010113A (en) * | 2012-07-02 | 2014-01-20 | Mitsubishi Heavy Ind Ltd | Emergency core cooling system of an atomic power plant |
| CN103017814A (en) * | 2012-12-10 | 2013-04-03 | 中国船舶重工集团公司第七一八研究所 | Hydrogen eliminating test system with safety protection function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107808701A (en) * | 2017-10-30 | 2018-03-16 | 上海核工程研究设计院有限公司 | Spray and shell wall heat-extraction system in a kind of passive containment |
| CN108511090A (en) * | 2018-03-08 | 2018-09-07 | 中国核电工程有限公司 | A kind of cooling water tank component of nuclear power plant's secondary side passive cooling system |
| CN110459334A (en) * | 2019-07-12 | 2019-11-15 | 华北电力大学 | A kind of presurized water reactor containment cooling system multifunction experiment apparatus and its experimental method |
| WO2024103444A1 (en) * | 2022-11-17 | 2024-05-23 | 中国核电工程有限公司 | Passive spraying system for aerosol removal in nuclear power plant, and containment system |
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