CN205211425U - Nuclear power station spent fuel pool cooling system - Google Patents
Nuclear power station spent fuel pool cooling system Download PDFInfo
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- CN205211425U CN205211425U CN201520996298.6U CN201520996298U CN205211425U CN 205211425 U CN205211425 U CN 205211425U CN 201520996298 U CN201520996298 U CN 201520996298U CN 205211425 U CN205211425 U CN 205211425U
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- cooling
- spent fuel
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- cooling circuit
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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 discloses a nuclear power station spent fuel pool cooling system, it includes three mutually independent cooling circuit, all is provided with cooling pump and heat exchanger on every cooling circuit, three cooling circuit's cooling pump is by emergent diesel engine reserve power supply, cooling circuit among the three cooling circuit and the 2nd cooling circuit's cooling pump are still supplied power by the reserve of SBO diesel engine. Compared with the prior art, the utility model discloses nuclear power station spent fuel pool cooling system strengthens the PTR cooling circuit's of system power and cold source, makes it can both carry out circulative cooling to spent fuel pool under various operating modes, need not to take away spent fuel pool's waste heat through moisturizing evaporation means, has avoided the radioactivity to leak to reaching and safety of weary fuel building has been guaranteed.
Description
Technical field
The utility model belongs to nuclear power station spent fuel reservoir cooling field, and more particularly, the utility model relates to a kind of nuclear power station spent fuel reservoir cooling system.
Background technology
In the system of nuclear power station, PTR system (ReactorPoolsandFuelPoolsCoolingandTreatmentSystem, reactor pit and fuel pit cool and disposal system) can for Spent Fuel Pool provides circulating cooling under normal operation and design basis accident operating mode, but at generation SBO (StationBlackOut, station blackout) and TLOCC (TotalLossofCoolingChain, completely lose cold chain) beyond design basis accident operating mode under, Spent Fuel Pool will lose normal cooling, so that Chi Shui is by the extremely boiling of the waste-heat of irradiated fuel assembly.If do not have effective cooling way, the water level of Spent Fuel Pool constantly will reduce because of the loss of pond evaporation of water, and irradiated fuel assembly, once exposed, will cause irradiated fuel assembly clad failure, cause radioactivity to the uncontrollable a large amount of release of environment.Although simple moisturizing can maintain flooding of irradiated fuel assembly, but just a kind of alleviation means, Chi Shui evaporates a large amount of steam produced will spread in room, pond and adjacent room, cause corresponding long hair high temperature, high humidity, personnel are unreachable, are difficult to carry out the associative operations such as accident treatment.And the environment of long term high temperature, high humidity is also greatly test to the xoncrete structure of spentnuclear fuel factory building and irradiated fuel assembly involucrum.
Refer to Fig. 1, a kind of known Spent Fuel Pool cooling system is provided with the cooling circuit 10,11,12 of three identical capacity, and three cooling circuits 10,11,12 share and fetch jellyfish pipe 13.Each cooling circuit 10,11,12 is arranged a pump and a heat exchanger, the design capacity of each cooling circuit 10,11,12 is 50% of Spent Fuel Pool maximum heating load under refueling outage operating mode.Wherein, the pump 100 of the first cooling circuit 10 is by A row bussed supply, and the pump 110 of the second cooling circuit 11 is by B row bussed supply, and the pump 120 of the 3rd cooling circuit 12 is powered by common bus.In addition, the pump 100,110 of first and second cooling circuit 10,11 is by emergency diesel dynamo (EDG, EmergencyDieselGenerator) backup.Three heat exchangers 14 all provide chilled water by RRI system (ComponentCoolingWaterSystem, component cooling water system).Obviously, when there is beyond design basis accident operating mode, three cooling circuits 10,11,12 of above-mentioned cooling system all can lose, and cause Spent Fuel Pool to lose whole circulating cooling, the means can only evaporated by moisturizing take away waste heat, thus produce aforesaid serious consequence.In addition, three cooling circuits 10,11,12 share and fetch jellyfish pipe 13, once fetch jellyfish pipe 13 cut occurs, three cooling circuits 10,11,12 also can be caused all unavailable, the circulating cooling afunction of cooling system.
Refer to Fig. 2, another kind of known Spent Fuel Pool cooling system is provided with three independently cooling circuits 20,21,22.First and second cooling circuit 20,21 is all arranged on two pump 200,210 and heat exchanger the 202,212, the 3rd cooling circuits 22 for subsequent use each other and a pump 220 and a heat exchanger 222 are set.The design capacity of first and second cooling circuit 20,21 is 50% of Spent Fuel Pool maximum heating load under refueling outage operating mode, the pump 200,210 that it is arranged is powered by the 2nd, 4 row power supply zones respectively, there is provided backup by emergency diesel dynamo, heat exchanger 202,222 provides chilled water by RRI system simultaneously.3rd cooling circuit 22 is designed to the temperature of Spent Fuel Pool to be maintained 95 DEG C or lower under SBO operating mode, its pump 220 is powered by the 1st row power supply zone, there is provided backup by Emergency diesel and SBO diesel engine simultaneously, heat exchanger 222 is by EVU system (ContainmentCoolingVentilationSystem, containment heat discharges system) provide standby to cool, the functional requirement run under SBO operating mode can be met.But owing to only having the 3rd cooling circuit 22 to tackle the beyond design basis accidents such as SBO and TLOCC, at the long periods of accident treatment, if this cooling circuit is lost because of long-time running, then Spent Fuel Pool still may lose circulating cooling.In addition, under the accident conditions completely losing alternating current, three cooling circuits all can lose, and make Spent Fuel Pool lose whole circulating cooling, and the means can only evaporated by moisturizing take away waste heat, thus produce aforesaid serious consequence.
In view of this, necessaryly a kind ofly the nuclear power station spent fuel reservoir that can solve the problem cooling system is provided.
Utility model content
The purpose of this utility model is: the nuclear power station spent fuel reservoir cooling system providing a kind of depth defense, to meet the hydronic requirement of Spent Fuel Pool under various accident conditions.
In order to realize above-mentioned utility model object, the utility model provides a kind of nuclear power station spent fuel reservoir cooling system, and it comprises three separate cooling circuits, each cooling circuit is provided with cooling pump and heat exchanger; The cooling pump of three cooling circuits is by Emergency diesel backup; The first cooling circuit in described three cooling circuits and the cooling pump of the second cooling circuit are also by SBO diesel engine backup.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the cooling pump of described three cooling circuits is respectively by the bus normal power supply that three row are different.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the cooling pump of at least one cooling circuit in described first cooling circuit and the second cooling circuit is also by mobile diesel-driven generator backup.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the cooling pump of the 3rd cooling circuit in described three cooling circuits is only by Emergency diesel backup.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and described three cooling circuits all only arrange a cooling pump.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the heat exchanger of described three cooling circuits provides chilled water by RRI system.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the heat exchanger of described first cooling circuit and the second cooling circuit also each free ECS system provides standby to cool.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and described three cooling circuits are all only provided with a heat exchanger, and three heat exchangers provide chilled water by three row of RRI system respectively.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and the design capacity of described three cooling circuits is identical.
One as the utility model nuclear power station spent fuel reservoir cooling system is improved, and in described three cooling circuits, the design capacity of any one is 50% of Spent Fuel Pool maximum heating load under refueling outage operating mode.
Compared with prior art, the utility model nuclear power station spent fuel reservoir cooling system is strengthened the power supply in PTR system cools loop and low-temperature receiver, make it can carry out circulating cooling to Spent Fuel Pool under various operating mode, without the need to being taken away the waste heat of Spent Fuel Pool by moisturizing evaporating device, avoid radioactivity to leak, and ensure that reaching and safety of spentnuclear fuel factory building.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model nuclear power station spent fuel reservoir cooling system and beneficial effect thereof are described in detail.
Fig. 1 is a kind of structural representation of known nuclear power station spent fuel reservoir cooling system.
Fig. 2 is the structural representation of another kind of known nuclear power station spent fuel reservoir cooling system.
Fig. 3 is the structural representation of the utility model nuclear power station spent fuel reservoir cooling system.
Embodiment
In order to make the purpose of this utility model, technical scheme and Advantageous Effects thereof more clear, below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.Should be understood that, the embodiment described in this instructions is only used to explain the utility model, is not intended to limit the utility model.
Refer to Fig. 3, the utility model nuclear power station spent fuel reservoir cooling system comprises identical, the separate cooling circuit 40,50,60 of three design capacities.Each cooling circuit 40,50,60 is all arranged a cooling pump and a heat exchanger, the design capacity of each cooling circuit 40,50,60 is 50% of Spent Fuel Pool maximum heating load under refueling outage operating mode.
In the power supply of cooling pump, the cooling pump 42 that first cooling circuit 40 is arranged is by A row bus normal power supply, the cooling pump 52 that second cooling circuit 50 is arranged is by B row bus normal power supply, and the cooling pump 62 that the 3rd cooling circuit 60 is arranged is by C row bus normal power supply.Moreover the cooling pump 42,52 of first and second cooling circuit 40,50 is respectively by Emergency diesel and SBO diesel engine backup, and the cooling pump 62 of the 3rd cooling circuit 60 is only by Emergency diesel backup.In addition, the cooling pump 42,52 of at least one cooling circuit in first and second cooling circuit 40,50, also by mobile diesel-driven generator backup, can be tackled and completely lose AC power accident.
In the cooling of heat exchanger, three heat exchangers 44,54,64 of three cooling circuits 40,50,60 are arranged by RRI system three respectively and provide chilled water, the heat exchanger 44,54 of first and second cooling circuit 40,50 also each free ECS system (ExtraCoolingSystem, extra cooling system) provides standby to cool.
In sum, in order to meet in the cooling requirement that Spent Fuel Pool under beyond design basis accident operating mode occurs, the utility model nuclear power station spent fuel reservoir cooling system is strengthened the power supply in PTR system cools loop and low-temperature receiver, make it can carry out circulating cooling to Spent Fuel Pool under various operating mode, without the need to being taken away the waste heat of Spent Fuel Pool by moisturizing evaporating device, avoid radioactivity to leak, and ensure that reaching and safety of spentnuclear fuel factory building.
Compared with prior art, the utility model nuclear power station spent fuel reservoir cooling system at least has the following advantages: be 1) available power supply and low-temperature receiver under the different accident conditions of cooling circuit 40,50 configuration, meet the hydronic requirement of Spent Fuel Pool; 2) cooling circuit 40,50 that two can be tackled beyond design basis accident operating mode is configured, to meet long-time running requirement for subsequent use each other.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and amendment to above-mentioned embodiment.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection domain of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. a nuclear power station spent fuel reservoir cooling system, comprises three separate cooling circuits, each cooling circuit is provided with cooling pump and heat exchanger; The cooling pump of three cooling circuits is by Emergency diesel backup; It is characterized in that: the first cooling circuit in described three cooling circuits and the cooling pump of the second cooling circuit are also by SBO diesel engine backup.
2. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: the cooling pump of described three cooling circuits is respectively by the bus normal power supply that three row are different.
3. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: the cooling pump of at least one cooling circuit in described first cooling circuit and the second cooling circuit is also by mobile diesel-driven generator backup.
4. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: the cooling pump of the 3rd cooling circuit in described three cooling circuits is only by Emergency diesel backup.
5. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: described three cooling circuits all only arrange a cooling pump.
6. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: the heat exchanger of described three cooling circuits provides chilled water by RRI system.
7. nuclear power station spent fuel reservoir cooling system according to claim 6, is characterized in that: the heat exchanger of described first cooling circuit and the second cooling circuit also each free ECS system provides standby to cool.
8. nuclear power station spent fuel reservoir cooling system according to claim 6, is characterized in that: described three cooling circuits are all only provided with a heat exchanger, and three heat exchangers provide chilled water by three row of RRI system respectively.
9. nuclear power station spent fuel reservoir cooling system according to claim 1, is characterized in that: the design capacity of described three cooling circuits is identical.
10. nuclear power station spent fuel reservoir cooling system according to claim 9, is characterized in that: in described three cooling circuits, the design capacity of any one is 50% of Spent Fuel Pool maximum heating load under refueling outage operating mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520996298.6U CN205211425U (en) | 2015-12-03 | 2015-12-03 | Nuclear power station spent fuel pool cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520996298.6U CN205211425U (en) | 2015-12-03 | 2015-12-03 | Nuclear power station spent fuel pool cooling system |
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| CN205211425U true CN205211425U (en) | 2016-05-04 |
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| CN201520996298.6U Active CN205211425U (en) | 2015-12-03 | 2015-12-03 | Nuclear power station spent fuel pool cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107767973A (en) * | 2016-08-19 | 2018-03-06 | 中广核工程有限公司 | Spent nuclear fuel in nuclear power plant pond supplements cooling device |
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- 2015-12-03 CN CN201520996298.6U patent/CN205211425U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107767973A (en) * | 2016-08-19 | 2018-03-06 | 中广核工程有限公司 | Spent nuclear fuel in nuclear power plant pond supplements cooling device |
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