CN105047237A - Spent fuel pool spray cooling system capable of combining active mode with passive mode and control method thereof - Google Patents
Spent fuel pool spray cooling system capable of combining active mode with passive mode and control method thereof Download PDFInfo
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- CN105047237A CN105047237A CN201510430551.6A CN201510430551A CN105047237A CN 105047237 A CN105047237 A CN 105047237A CN 201510430551 A CN201510430551 A CN 201510430551A CN 105047237 A CN105047237 A CN 105047237A
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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 invention belongs to the technical field of nuclear reactor safety, and particularly relates to a spent fuel pool spray cooling system capable of combining an active mode with a passive mode and a control method thereof. In the prior art, a spent fuel pool in a reactor mostly adopts an active water charging system and heat exchanger, and once the power problems occur, the safety guarantee is lost to cause more serious nuclear accidents to occur. The spent fuel pool spray cooling system capable of combining the active mode with the passive mode comprises water taking pipelines, spray heads and valves which are arranged on the water taking pipelines, a fire fighting device connected with the water taking pipelines, a high-level water tank which is arranged at the high position and connected with the water taking pipelines and a water level alarm device connected with the valves and the fire fighting device. The system can adopt the active mode and the passive mode to charge water to the spent fuel pool and cool the spent fuel pool, and therefore the safety of the spent fuel pool is greatly improved.
Description
Technical field
The invention belongs to nuclear reactor safety technical field, be specifically related to a kind of active in conjunction with non-active Spent Fuel Pool spray cooling system and control method thereof.
Background technology
Spentnuclear fuel, also known as rradiated nuclear fuel, is live through radiation irradiation, used nuclear fuel, is normally produced by the nuclear reactor of nuclear power station.Spentnuclear fuel has high radioactive, water performance in radiation-screening and heat radiation is all well and good (for the radiation that those are discharged by spentnuclear fuel, every 7 centimetres of dark water just can reduce by half radiant quantity), thus spentnuclear fuel is stored in the bottom of Spent Fuel Pool, until radiomaterial active degree is wherein reduced to just to be shifted out from spentnuclear fuel pond to a certain degree do follow-up process.
After Fukushima, Japan nuclear power plant accident, the Spent Fuel Pool of multiple unit temporarily loses the ability of cooling within the quite a long time, and cause the abnormal rising of Spent Fuel Pool water temperature, therefore the security of Spent Fuel Pool causes the extensive concern of domestic and international nuclear power industry.And at present, the cooling of Spent Fuel Pool is mainly through active water charging system and heat interchanger.
After nuclear power station has an accident, may cause concurrent accidents such as losing the outer electric energy of factory, cause Spent Fuel Pool to be lost and cool, or leak, active water charging system, heat interchanger and water level monitoring system probably can not use.If can not be cooled in long-time after accident or supplement, sump water temperature can be caused to rise, and moisture constantly evaporates, water level tide, even be down to below irradiated fuel assembly, cause irradiated fuel assembly exposed, overheated and damage, exist radiomaterial release risk.
Summary of the invention
For the defect of the cooling of current Spent Fuel Pool and water supplement technology, be necessary to design a kind of non-active and active cooling system combined, in accident etc. in particular cases (as lacking or the situation of mismatched contact supply), can in a long time for the equipment such as Spent Fuel Pool provide lasting, cool reliably and moisturizing, avoid irradiated fuel assembly because the nuclear accident that causes of the minimizing of chilled water.
For reaching above object, the technical solution used in the present invention is a kind of active in conjunction with non-active Spent Fuel Pool spray cooling system, comprise water intaking pipeline, be arranged on the spray head on described water intaking pipeline and valve, the fire plant be connected with described water intaking pipeline, also comprise and be arranged on eminence and the elevated tank be connected with described water intaking pipeline, the level alarm for water be connected with described valve, fire plant.
Further, described water intaking pipeline comprises first fetching water pipeline of being connected with described elevated tank, and be connected with described fire plant second fetches water pipeline.
Further, described valve comprises the first valve be arranged on described first water intaking pipeline, is arranged on the second valve on described second water intaking pipeline.
Further, described level alarm for water comprises stator, float, alarm signal generator and accumulator.
Further, described stator, float can contact with each other with the lifting of water level or isolate.
Further, along with described stator, the contacting with each other or isolate of float, described alarm signal generator can carry out reporting to the police or removing warning, and the signal produced by alarm signal generator controls unlatching or the closedown of described valve and fire plant.
For reaching above object, the invention also discloses a kind of for the above-described active control method in conjunction with non-active Spent Fuel Pool spray cooling system, comprising the following steps:
Level alarm for water sends warning, opens the second valve and fire plant;
Judge spray head whether water outlet, if water outlet, keep standing state; If non-water outlet, open the first valve;
Level alarm for water is removed and is reported to the police, and closes the valve opened, and closes fire plant.
Effect of the present invention is:
1. possess active and non-active two kinds of cooling water supplementing methods, electric power normally and under abnormal conditions all can provide cooling and water-refilling operation;
2. make full use of existing equipment and condition, save cost;
3. structure is simple, and reliability is high.
Accompanying drawing explanation
Fig. 1 arranges schematic diagram for active in the specific embodiment of the invention in conjunction with non-active Spent Fuel Pool spray cooling system;
In figure: 1-elevated tank, 2-fire plant, 3-fuel factory building, 4-nuclear island factory building, 5-Spent Fuel Pool, 6-first fetches water pipeline, 7-first valve, 8-irradiated fuel assembly, 9-spray head, 10-level alarm for water, 11-stator, 12-float, 13-second fetches water pipeline, 14-second valve.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, provided by the invention active in conjunction with non-active Spent Fuel Pool spray cooling system, comprise the elevated tank 1 being arranged in nuclear island factory building 4 or fuel factory building 3 top, keep the huge drop (at least 20 meters) between Spent Fuel Pool 5, this drop provides the driving pressure of non-active spray.Be arranged on multiple spray heads 9 (in the present embodiment, spray head 9 is even is arranged in Spent Fuel Pool long side wall, by specific angle, enables shower water cover all irradiated fuel assemblies) of Spent Fuel Pool 5 side wall upper part.Connected by the first water intaking pipeline 6 between elevated tank 1 and spray head 9, the first water intaking pipeline 6 is provided with the first valve 7 that DC power control water route opens and closes.
Provided by the inventionly actively also comprise fire plant 2 in conjunction with non-active Spent Fuel Pool spray cooling system, adopted in the present invention is the general fire plant of current nuclear power station, fire plant 2 is connected with the first water intaking pipeline 6 by the second water intaking pipeline 13, second water intaking pipeline 13 is provided with the second valve 14 that DC power control water route opens and closes, fire plant 2 can provide fire water to cool and moisturizing Spent Fuel Pool 5 to spray head 9, and the power of fire plant 2 comes from air pressure tank and fire extinguishing pump (not marking in figure).
Provided by the inventionly actively also comprise level alarm for water 10 in conjunction with non-active Spent Fuel Pool spray cooling system, level alarm for water 10 comprises stator 11, float 12, and alarm signal generator and accumulator (not marking in figure).Arrange slide rail at the sidewall of Spent Fuel Pool 5, stator 11 and float 12 are placed in one; Stator 11 is fixed on Spent Fuel Pool 5 sidewall (warning line of height set by Spent Fuel Pool 5 and determine), and float 12 is limited to the liquid level (be arranged on stator 11) with Spent Fuel Pool 5 in slide rail and moves up and down.Stator 11 and float 12 are provided with contact (not marking in figure), wherein the contact of float 12 is higher than the water surface, avoid contacting with water, when Spent Fuel Pool 5 water level decreasing, float 12 moves down with liquid level, can connect level alarm for water 10 after both stator 11 and float 12 contact comes in contact.Level alarm for water 10 is connected with the second valve 14 and fire plant 2 with the first valve 7, and can control the opening and closing of the said equipment.Under normal circumstances, float 12 is by buoyancy, and separate with stator 11, now level alarm for water 10 and valve do not start, and can ensure that the accumulator as direct supply can work when needed; When water level decreasing in Spent Fuel Pool 5, float 12 moves down with liquid level, to when contacting with stator 11, level alarm for water 10 starts, and alarm signal generator produces signal, and triggers valve open, start fire plant 2, spray is opened, and for irradiated fuel assembly provides cooling, ensures irradiated fuel assembly safety.In addition, in the present embodiment, accumulator is high-energy battery, at least can maintain level alarm for water 10, first valve 7, second valve 14 and run 72 hours.
Provided by the invention active in conjunction with non-active Spent Fuel Pool spray cooling system work in order to coordinate, the invention also discloses this active control method in conjunction with non-active Spent Fuel Pool spray cooling system, comprise the steps:
S1: when stator, float contact, level alarm for water sends warning, opens the second valve and fire plant;
S2: judge spray head whether water outlet, if water outlet, keeps standing state; If non-water outlet, open the first valve;
S3: when stator, float are isolated, level alarm for water is removed and is reported to the police, and closes the valve opened, and closes fire plant.
Finally illustrate the active practical application in conjunction with non-active Spent Fuel Pool spray cooling system provided by the present invention.
The sidewall in the spentnuclear fuel pond 5 of nuclear power station is arranged and lays stator 11 and float 12 slide rail, stator is fixed on warning line position, when spentnuclear fuel pond 5 water level is higher than warning line, stator 11 does not contact with float 12, level alarm for water 10 does not work, and the first valve 7 and the second valve 14 and fire plant 2 are in closed condition; When spentnuclear fuel pond 5 water level is lower than warning line, stator 11 and float 12 come in contact, level alarm for water 10 begins through alarm signal generator and gives the alarm, open the second valve 14 simultaneously and start fire plant 2, electric power in nuclear power station inside under normal circumstances, fire plant 2 is started working and is supplied water to spray head 9 by the second water intaking pipeline 13, thus provides cooling measure for the irradiated fuel assembly 8 in spentnuclear fuel pond 5.If the electric power supply in nuclear power station goes wrong, fire plant 2 cannot normally work, level alarm for water 10 can open the first valve 7 on the first water intaking pipeline 6 at once, install water in pinnacled (such as Nuclear Power Station Factory Building top) elevated tank 1 under gravity along the first water intaking pipeline 6 by spray head 9 for the irradiated fuel assembly 8 in spentnuclear fuel pond 5 provides cooling measure, thus ensure the irradiated fuel assembly 8 not too high or situation about being exposed to outside the water surface of occurrence temperature.When spentnuclear fuel pond 5 water level comes back on warning line, stator 11 is separated with float 12, level alarm for water 10 stop alarm, and controls closedown first valve 7 and the second valve 14 and fire plant 2.Accumulator can go wrong at external power, when fire plant 2 cannot provide chilled water, continues to maintain level alarm for water 10, first valve 7, second valve 14 and runs 72 hours, thus strives for time of more growing for the process of nuclear accident.
Device of the present invention is not limited to the embodiment described in embodiment, those skilled in the art's technical scheme according to the present invention draws other embodiment, such as, use the level alarm for water of other products, substituting fire water supply etc. with diesel-driven generator extraction material-changing water tank water source also belongs within the scope of the claims in the present invention and equivalent technology thereof to amendment of the present invention and modification, belongs to technological innovation scope of the present invention equally.
Claims (7)
1. one kind active in conjunction with non-active Spent Fuel Pool spray cooling system, comprise water intaking pipeline, be arranged on the spray head (9) on described water intaking pipeline and valve, the fire plant (2) be connected with described water intaking pipeline, it is characterized in that: also comprise and be arranged on eminence and the elevated tank (1) be connected with described water intaking pipeline, the level alarm for water (10) be connected with described valve, fire plant (2).
2. as claimed in claim 1 active in conjunction with non-active Spent Fuel Pool spray cooling system, it is characterized in that: described water intaking pipeline comprises first fetching water pipeline (6) of being connected with described elevated tank (1), be connected with described fire plant (2) second fetches water pipeline (13).
3. as claimed in claim 2 active in conjunction with non-active Spent Fuel Pool spray cooling system, it is characterized in that: described valve comprises the first valve (7) be arranged in described first water intaking pipeline (6), be arranged on the second valve (14) in described second water intaking pipeline (13).
4. as claimed in claim 1 active in conjunction with non-active Spent Fuel Pool spray cooling system, it is characterized in that: described level alarm for water (10) comprises stator (11), float (12), alarm signal generator and accumulator.
5. as claimed in claim 4 active in conjunction with non-active Spent Fuel Pool spray cooling system, it is characterized in that: described stator (11), float (12) can contact with each other with the lifting of water level or isolate.
6. as claimed in claim 5 active in conjunction with non-active Spent Fuel Pool spray cooling system, it is characterized in that: along with described stator (11), the contacting with each other or isolate of float (12), described alarm signal generator can carry out reporting to the police or removing warning, and the signal produced by alarm signal generator controls unlatching or the closedown of described valve and fire plant (2).
7., for the active control method in conjunction with non-active Spent Fuel Pool spray cooling system described in claim 1-6 any one, comprise the steps:
Step 1: level alarm for water sends warning, opens the second valve and fire plant;
Step 2: judge spray head whether water outlet, if water outlet, keeps standing state; If non-water outlet, open the first valve;
Step 3: level alarm for water is removed and reported to the police, and closes the valve opened, and closes fire plant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510430551.6A CN105047237B (en) | 2015-07-21 | 2015-07-21 | The passive Spent Fuel Pool spray cooling system of active combination and its control method |
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| CN201510430551.6A CN105047237B (en) | 2015-07-21 | 2015-07-21 | The passive Spent Fuel Pool spray cooling system of active combination and its control method |
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| CN105047237A true CN105047237A (en) | 2015-11-11 |
| CN105047237B CN105047237B (en) | 2018-09-25 |
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Cited By (3)
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| CN105427901A (en) * | 2015-12-10 | 2016-03-23 | 田力 | Pool type ordinary pressure heating reactor using spent fuel pool cooling device |
| CN107448831A (en) * | 2017-09-14 | 2017-12-08 | 上海核工程研究设计院有限公司 | A kind of fixed underwater lighting device for spent nuclear fuel in nuclear power plant pond and attached pond |
| CN109060319A (en) * | 2018-05-29 | 2018-12-21 | 华北电力大学 | A kind of experimental rig and method for nuclear power station spent fuel reservoir nozzle sensibility |
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| CN105427901A (en) * | 2015-12-10 | 2016-03-23 | 田力 | Pool type ordinary pressure heating reactor using spent fuel pool cooling device |
| CN107448831A (en) * | 2017-09-14 | 2017-12-08 | 上海核工程研究设计院有限公司 | A kind of fixed underwater lighting device for spent nuclear fuel in nuclear power plant pond and attached pond |
| CN109060319A (en) * | 2018-05-29 | 2018-12-21 | 华北电力大学 | A kind of experimental rig and method for nuclear power station spent fuel reservoir nozzle sensibility |
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| CN105047237B (en) | 2018-09-25 |
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