CN103928069A - Containment built-in spent fuel pool - Google Patents
Containment built-in spent fuel pool Download PDFInfo
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- CN103928069A CN103928069A CN201310011902.0A CN201310011902A CN103928069A CN 103928069 A CN103928069 A CN 103928069A CN 201310011902 A CN201310011902 A CN 201310011902A CN 103928069 A CN103928069 A CN 103928069A
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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 invention belongs to the technical field of nuclear power plant spent fuel pools and safe protection measure design thereof, and particularly relates to a containment built-in spent fuel pool, which comprises a spent fuel pool, a containment built-in water tank, a containment shell, a condensed water collector, valves, pipelines, a recirculation port and a containment cooling system, wherein the spent fuel pool and the containment built-in water tank are arranged inside the containment and are connected, the top of the containment built-in water tank is provided with the condensed water collector, the condensed water collector is connected with the inner wall of the containment shell, the lower end of the containment built-in water tank is connected with a reactor pressure vessel through the pipeline, the pipeline is provided with the valve, the recirculation port is connected on the outlet pipeline of the containment built-in water tank, and the containment cooling system is arranged on the outer portion of the containment shell. According to the present invention, the passive manner is adopted to cool the spent fuel without dependence on the external power supply so as to improve safety of the spent fuel pool under accidents and ensure radioactivity packaging and safe cooling of the spent fuel.
Description
Technical field
The invention belongs to Nuclear Power Station's Exhausted Fuels pond and safety precautions design field thereof, be specifically related to the built-in spentnuclear fuel of a kind of containment pond.
Background technology
Spentnuclear fuel pond, is the facility that nuclear power station stores spentnuclear fuel, and for radioactive containing, the water level in spentnuclear fuel pond will be higher than amount of fuel rice.Simultaneously spentnuclear fuel is emitted decay heat, therefore need to continue spentnuclear fuel pond cooling, to guarantee that the water level in spentnuclear fuel pond can not cause the exposed of spentnuclear fuel because evaporation of water declines, the safety of assurance spentnuclear fuel.The cooling of existing spentnuclear fuel pond is by enabling fashion, in the situation that losing factory's dispatch from foreign news agency, can not carry out refrigerating function.After Fukushima accident, spentnuclear fuel pond lacks the cooling spentnuclear fuel pool boiling that causes, and water level declines, and radioactivity leaks outside, for the safety in spentnuclear fuel pond has been beaten alarm bell.
Summary of the invention
The object of the invention is to propose the built-in spentnuclear fuel of a kind of containment pond, can utilize non-active mode to carry out cooling to spentnuclear fuel, do not rely on external power, security with spentnuclear fuel pond under raising accident, the radioactivity that guarantees spentnuclear fuel contains with safety cooling, thereby the radioactivity that is reduced in nuclear power plant under extreme accident leaks outside, and to the issuable harm of the public.
For achieving the above object, the technical solution used in the present invention is:
The built-in spentnuclear fuel of a kind of containment pond comprises spentnuclear fuel pond, containment inner water-tank, containment, condensate collector, valve, pipeline, recirculation port, containment cooling system;
Spentnuclear fuel pond and containment inner water-tank are arranged in containment, spentnuclear fuel pond is connected with containment inner water-tank, the top of containment inner water-tank is provided with condensate collector, condensate collector is connected with containment inwall, the lower end of containment inner water-tank is connected with reactor pressure vessel by pipeline, is provided with valve on pipeline; Recirculation port is connected on containment inner water-tank outlet conduit; Containment outer setting has containment cooling system.
Described containment cooling system comprises containment cooling pond, fair water fin, gas outlet, reactor building, air intake opening; Described containment is positioned at reactor building, and reactor building surrounding interior and the containment first half is provided with fair water fin, and reactor building top has air intake opening, and reactor building top has gas outlet; Containment cooling pond is positioned at reactor building, and containment the first half is immersed in containment cooling pond, and containment top is flooded, and containment cooling pond water level is lower than ground level.
The position of described spentnuclear fuel pond in containment is high identical with reactor cavity; Described containment inner water-tank absolute altitude is higher than spentnuclear fuel pond, and the lower end of containment inner water-tank is connected with spentnuclear fuel pond, reactor pressure vessel respectively by pipeline.
The course of work in the built-in spentnuclear fuel of described containment pond is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system in spentnuclear fuel pond is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown; Meanwhile, the normal cooling system in spentnuclear fuel pond is lost; Because spentnuclear fuel pond discharges decay heat, spentnuclear fuel pond water temperature rises and start vaporizer gradually, and spentnuclear fuel pool water level declines; When spentnuclear fuel pool water level drops to certain level, trigger the valve opening that connects containment inner water-tank and spentnuclear fuel pond, containment inner water-tank is that moisturizing is carried out in spentnuclear fuel pond;
(3) when there is minor break forfeiture cooling medium accident and station blackout, cooling medium in reactor pressure vessel spurts to containment, reactor shutdown, the unloading pressure means of reactor pressure vessel is opened, reactor pressure vessel pressure drops to and containment pressure equilibrium gradually, the water of containment inner water-tank starts injection pressure container, is reactor core moisturizing, keeps core deluge; Meanwhile, the normal cooling system in spentnuclear fuel pond is lost, and spentnuclear fuel pool water level declines, and triggers valve opening while reaching certain water level, and containment inner water-tank is the moisturizing of spentnuclear fuel pond, keeps flooding of spentnuclear fuel;
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond is heated to be steam, and wherein a part rises to containment top, in the condensation of containment inwall, condensate water flows down and is collected by condensate collector along containment inwall, flow in containment inner water-tank; The water of another part other position condensation in containment is because gravity drops down onto ground in containment, and be connected to containment inner water-tank outlet conduit by recirculation port, like this, all condensate waters finally can re-inject reactor core and spentnuclear fuel pond by containment outlet conduit, for reactor core and spentnuclear fuel pond provide long-term cooling; Heat reaches containment cooling pond by containment, and containment cooling pond water temperature raises and start vaporizer, and heat is passed to ultimate heat sink, and containment cooling pond water level declines, and when water is evaporated soon, refrigerating mode starts to be transitioned into air-cooled; In reactor building, be provided with fair water fin, to form the air flow channel of cooling containment, improve air-cooling efficiency; Air is entered by the air intake opening of reactor building, walks around fair water fin and enters fair water fin inner flow passage, and for containment surface provides air cooling, heated air flows out reactor building from the gas outlet at reactor building top, continues cooling containment; The Capacity design of containment inner water-tank is for keeping all the time reactor cavity and spentnuclear fuel pond to flood.
Described containment cooling system comprises fair water fin, gas outlet; Reactor building, air intake opening, spray water tank, spray thrower; Described containment is positioned at reactor building, and reactor building top is provided with spray water tank, and the bottom of spray water tank is provided with spray thrower, and spray thrower is positioned at containment top; In reactor building and containment surrounding be provided with fair water fin, reactor building top has air intake opening, reactor building top has gas outlet.
In described containment inner water-tank, bottom is integrated with spentnuclear fuel pond.
The course of work in the built-in spentnuclear fuel of described containment pond is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system in spentnuclear fuel pond is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown; Meanwhile, the normal cooling system in spentnuclear fuel pond is lost; Because spentnuclear fuel pond discharges decay heat, spentnuclear fuel pond water temperature rises and start vaporizer gradually, and the water loading amount of containment inner water-tank guarantees that the spentnuclear fuel in spentnuclear fuel pond can be not exposed;
(3) when there is minor break forfeiture cooling medium accident and station blackout, cooling medium in reactor pressure vessel spurts to containment, reactor shutdown, the unloading pressure means of pressure vessel is opened, the high pressure of reactor and middle pressure water charging system are reactor core moisturizing in succession, and reactor pressure vessel pressure drops to and containment pressure equilibrium gradually, and the water of containment inner water-tank starts piii reactor pressure vessel, for reactor core moisturizing, keep core deluge; In this simultaneously, because spentnuclear fuel is placed and containment inner water-tank bottom, within the longer time, do not need moisturizing can keep spentnuclear fuel to flood;
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond is heated to be steam, and wherein a part rises to containment top, in the condensation of containment inwall, condensate water flows down and is collected by condensate collector along containment inwall, flow in containment inner water-tank; The water of another part other position condensation in containment is because gravity drops down onto ground in containment, and be connected to containment inner water-tank outlet conduit by recirculation port, like this, all condensate waters finally can again enter containment inner water-tank and flood spentnuclear fuel, and can re-inject reactor core, for reactor core and spentnuclear fuel pond provide long-term cooling; Heat is passed to ultimate heat sink by spray thrower; When spray Water in Water Tanks is used up, refrigerating mode starts to be transitioned into air-cooled; In reactor building, be provided with fair water fin, to form the air flow channel of cooling containment, improve air-cooling efficiency; Air is entered by the air intake opening of reactor building, walks around fair water fin and enters fair water fin inner flow passage, and for containment surface provides air cooling, heated air flows out reactor building from the gas outlet at reactor building top, continues cooling containment; The Capacity design of containment inner water-tank is for keeping all the time reactor cavity and spentnuclear fuel to flood.
The obtained beneficial effect of the present invention is:
The built-in spentnuclear fuel of containment of the present invention pond, can be under accident conditions, utilize the safety in the associated safety System Assurance spentnuclear fuel pond of reactor, and do not set up independently spentnuclear fuel pond security system, there is system simplification, safe and reliable feature, guaranteed that after accident, contain without the safety in the situation of human intervention and radioactivity in a long time in spentnuclear fuel pond:
(1) spentnuclear fuel pond is positioned in containment, under accident, utilizes containment to contain the radioactivity in spentnuclear fuel pond, has stopped the radioactive leak phenomenon because the cooling interruption in spentnuclear fuel pond produces under accident;
(2) under accident, utilize containment inner water-tank for the moisturizing of spentnuclear fuel pond, prevent that spentnuclear fuel is exposed;
(3), under accident, utilize containment cooling system by the water condensation of spentnuclear fuel pond evaporation, and condensate water is again noted and got back in spentnuclear fuel pond, for spentnuclear fuel pond provides cooling for a long time.
Accompanying drawing explanation
Fig. 1 is the built-in spentnuclear fuel pool structure of containment of the present invention figure;
Fig. 2 is the built-in spentnuclear fuel of containment of the present invention pond specific embodiment 1 structural drawing;
Fig. 3 is the built-in spentnuclear fuel of containment of the present invention pond specific embodiment 2 structural drawing;
In figure: 1, spentnuclear fuel pond; 2, containment inner water-tank; 3, containment; 4, condensate collector; 5, valve; 6, pipeline; 7, recirculation port; 8, containment cooling system; 9, reactor pressure vessel; 10, containment cooling pond; 11, fair water fin; 12, gas outlet; 13, reactor building; 14, air intake opening; 15, spray water tank; 16, spray thrower.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, this spentnuclear fuel pond, the built-in spentnuclear fuel of containment of the present invention pond comprises spentnuclear fuel pond 1, containment inner water-tank 2, containment 3, condensate collector 4, valve 5, pipeline 6, recirculation port 7, containment cooling system 8;
As shown in Figure 2, for the built-in spentnuclear fuel of containment of the present invention pond specific embodiment 1, in the present embodiment, containment 3, containment cooling pond 10 is positioned at reactor building 13, spentnuclear fuel pond 1 is arranged in containment 3, the position of spentnuclear fuel pond 1 in containment 3 is high basic identical with reactor cavity, containment inner water-tank 2 is arranged in containment 3, and its absolute altitude is higher than spentnuclear fuel pond 1, the top of containment inner water-tank 2 is provided with condensate collector 4, condensate collector 4 is connected with containment 3 inwalls, the lower end of containment inner water-tank 2 by pipeline 6 respectively with spentnuclear fuel pond 1, reactor pressure vessel 9 connects, on pipeline 6, be provided with valve 5, containment inner water-tank 2 provides moisturizing by valve 5 and pipeline 6 for reactor pressure vessel 9 and spentnuclear fuel pond 1 under accident, recirculation port 7 is connected on containment inner water-tank 2 outlet conduits 6, for being reactor pressure vessel 9 and 1 moisturizing of spentnuclear fuel pond at long-term circulation time.Containment 3 the first half are immersed in containment cooling pond 10, and containment 3 tops are flooded.Containment cooling pond 10 water levels are lower than ground level.After the water of containment cooling pond 10 is evaporated to certain water level, containment external refrigeration is transitioned into air-cooled by water-cooled.Containment 3 outer setting have containment cooling system 8, and containment cooling system 8 comprises containment cooling pond 10, fair water fin 11, gas outlet 12, reactor building 13, air intake opening 14; Reactor building 13 surrounding interior and containment 3 first halves is provided with fair water fin 11, to form the air flow channel of cooling containment 3, improves air-cooling efficiency.Reactor building 13 tops have air intake opening 14, extraneous air enters factory building reactor building 13 from air intake opening 14, walk around fair water fin 11, enter fair water fin inner flow passage, for containment 3 surfaces provide air cooling, heated air flows out reactor building 13 from the gas outlet 12 at reactor building 13 tops.
After reactor has an accident, guarantee that the process of spentnuclear fuel pond safety is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system in spentnuclear fuel pond 1 is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown.Meanwhile, the normal cooling system in spentnuclear fuel pond 1 is lost; Because spentnuclear fuel pond 1 discharges decay heat, spentnuclear fuel pond 1 coolant-temperature gage rises and start vaporizer gradually, and spentnuclear fuel pond 1 water level declines; When spentnuclear fuel pond 1 water level drops to certain level, trigger valve 5 unlatchings that connect containment inner water-tank 2 and spentnuclear fuel pond 1, containment inner water-tank 2 carries out moisturizing for spentnuclear fuel pond 1;
(3) when there is minor break forfeiture cooling medium accident and station blackout (envelope station blackout accident), cooling medium in reactor pressure vessel 9 spurts to containment 3, reactor shutdown, the unloading pressure means of reactor pressure vessel 9 is opened, reactor pressure vessel 9 pressure drop to and containment 3 pressure equilibriums gradually, the water of containment inner water-tank 2 starts injection pressure container, is reactor core moisturizing, keeps core deluge; Meanwhile, the normal cooling system in spentnuclear fuel pond 1 is lost, and spentnuclear fuel pond 1 water level declines, and triggers valve 5 and open while reaching certain water level, and containment inner water-tank 2 is the moisturizing of spentnuclear fuel pond, keeps flooding of spentnuclear fuel.
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond 1 is heated to be steam, and wherein a part rises to containment 3 tops, in containment 3 inwall condensations, condensate water flows down and is collected by condensate collector 4 along containment inwall, flow in containment inner water-tank 2; The water of another part other position condensation in containment 3 is because gravity drops down onto the interior ground of containment 3, and be connected to containment inner water-tank 2 outlet conduits 6 by recirculation port 7, like this, all condensate waters finally can re-inject reactor core and spentnuclear fuel pond 1 by containment outlet conduit 6, for reactor core and spentnuclear fuel pond 1 provide long-term cooling.Heat reaches containment cooling pond 10 by containment 3, and containment cooling pond 10 water temperatures raise and start vaporizer, and heat is passed to ultimate heat sink, and containment cooling pond 10 water levels decline, and when water is evaporated soon, refrigerating mode starts to be transitioned into air-cooled.In reactor building 13, be provided with fair water fin 11, to form the air flow channel of cooling containment 3, improve air-cooling efficiency.Air is entered by the air intake opening 14 of reactor building 13, walk around fair water fin 11 and enter fair water fin inner flow passage, for containment 3 surfaces provide air cooling, heated air flows out reactor building 13 from the gas outlet 12 at reactor building 13 tops, continues cooling containment.The Capacity design of containment inner water-tank 2 is for keeping all the time reactor cavity and spentnuclear fuel pond 1 to flood.
(5) by above measure, can after accident, provide a couple of days reactor core and spentnuclear fuel pond 1 non-actively cooling, and do not need the access of human intervention and external power.
As shown in Figure 3, for the built-in spentnuclear fuel of containment of the present invention pond specific embodiment 2, the difference of the present embodiment and embodiment mono-is: (1) containment inner water-tank 2 interior bottoms are integrated with spentnuclear fuel pond 1, has eliminated containment inner water-tank 2 for pipeline and the valve of spentnuclear fuel pond 1 moisturizing; The lower end of containment inner water-tank 2 is connected with reactor pressure vessel 9 by pipeline 6, is provided with valve 5 on pipeline 6; (2) containment 3 outer setting have containment cooling system 8, and containment cooling system 8 comprises fair water fin 11, gas outlet 12; Reactor building 13, air intake opening 14, spray water tank 15, spray thrower 16, reactor building 13 tops are provided with spray water tank 15, and the bottom of spray water tank 15 is provided with spray thrower 16, and spray thrower 16 is positioned at containment 3 tops; Containment cooling system 8 adopts containment to spray in conjunction with air cooled mode outward, spray water tank 15 is by spray thrower 16, water is sprayed onto to containment 3 outer walls and carries out the cooling of containment 3, in reactor building 13 and containment 3 surroundings be provided with fair water fin 11, to form the air flow channel of cooling containment 3, improve air-cooling efficiency.Reactor building 13 tops have air intake opening 14, extraneous air enters factory building reactor building 13 from air intake opening 14, walk around fair water fin 11, enter fair water fin inner flow passage, for containment 3 surfaces provide air cooling, heated air flows out reactor building 13 from the gas outlet 12 at reactor building 13 tops.
After reactor has an accident, guarantee that the process of spentnuclear fuel pond safety is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system in spentnuclear fuel pond 1 is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown.Meanwhile, the normal cooling system in spentnuclear fuel pond 1 is lost; Because spentnuclear fuel pond 1 discharges decay heat, spentnuclear fuel pond 1 coolant-temperature gage rises and start vaporizer gradually, and the water loading amount of containment inner water-tank 2 guarantees that the spentnuclear fuel in spentnuclear fuel pond 1 can be not exposed;
(3) when there is minor break forfeiture cooling medium accident and station blackout, cooling medium in reactor pressure vessel 9 spurts to containment 3, reactor shutdown, the unloading pressure means of pressure vessel is opened, the high pressure of reactor and middle pressure water charging system are reactor core moisturizing in succession, and reactor pressure vessel 9 pressure drop to and containment 3 pressure equilibriums gradually, and the water of containment inner water-tank 2 starts piii reactor pressure vessel 9, for reactor core moisturizing, keep core deluge; In this simultaneously, because spentnuclear fuel is placed and containment inner water-tank 2 bottoms, within the longer time, do not need moisturizing can keep spentnuclear fuel to flood;
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond is heated to be steam, and wherein a part rises to containment 3 tops, in containment 3 inwall condensations, condensate water flows down and is collected by condensate collector 4 along containment 3 inwalls, flow in containment inner water-tank 2; The water of another part other position condensation in containment 3 is because gravity drops down onto the interior ground of containment 3, and be connected to containment inner water-tank 2 outlet conduits 6 by recirculation port 7, like this, all condensate waters finally can again enter containment inner water-tank 2 and flood spentnuclear fuel, and can re-inject reactor core, for reactor core and spentnuclear fuel pond 1 provide long-term cooling.Heat is passed to ultimate heat sink by spray thrower 16.When in spray water tank 15, water is used up, refrigerating mode starts to be transitioned into air-cooled.In reactor building 13, be provided with fair water fin 11, to form the air flow channel of cooling containment, improve air-cooling efficiency.Air is entered by the air intake opening 14 of reactor building 13, walk around fair water fin 11 and enter fair water fin inner flow passage, for containment 3 surfaces provide air cooling, heated air flows out reactor building 13 from the gas outlet 12 at reactor building 13 tops, continues cooling containment 3.The Capacity design of containment inner water-tank 2 is for keeping all the time reactor cavity and spentnuclear fuel to flood.
(5) by above measure, can after accident, provide a couple of days reactor core and spentnuclear fuel pond 1 non-actively cooling, and do not need the access of human intervention and external power.
Claims (7)
1. the built-in spentnuclear fuel of a containment pond, is characterized in that: this spentnuclear fuel pond comprises spentnuclear fuel pond (1), containment inner water-tank (2), containment (3), condensate collector (4), valve (5), pipeline (6), recirculation port (7), containment cooling system (8);
Spentnuclear fuel pond (1) and containment inner water-tank (2) are arranged in containment (3), spentnuclear fuel pond (1) is connected with containment inner water-tank (2), the top of containment inner water-tank (2) is provided with condensate collector (4), condensate collector (4) is connected with containment (3) inwall, the lower end of containment inner water-tank (2) is connected with reactor pressure vessel (9) by pipeline (6), is provided with valve (5) on pipeline (6); Recirculation port (7) is connected on containment inner water-tank (2) outlet conduit (6); Containment (3) outer setting has containment cooling system (8).
2. the built-in spentnuclear fuel of containment according to claim 1 pond, is characterized in that: described containment cooling system (8) comprises containment cooling pond (10), fair water fin (11), gas outlet (12), reactor building (13), air intake opening (14); Described containment (3) is positioned at reactor building (13), reactor building (13) surrounding interior and containment (3) first half is provided with fair water fin (11), reactor building (13) top has air intake opening (14), and reactor building (13) top has gas outlet (12); Containment cooling pond (10) is positioned at reactor building (13), and containment (3) the first half is immersed in containment cooling pond (10), and containment (3) top is flooded, and containment cooling pond (10) water level is lower than ground level.
3. the built-in spentnuclear fuel of containment according to claim 1 and 2 pond, is characterized in that: the position of described spentnuclear fuel pond (1) in containment (3) is high identical with reactor cavity; Described containment inner water-tank (2) absolute altitude is higher than spentnuclear fuel pond (1), and the lower end of containment inner water-tank (2) is connected with spentnuclear fuel pond (1), reactor pressure vessel (9) respectively by pipeline (6).
4. the built-in spentnuclear fuel of containment according to claim 3 pond, is characterized in that: the course of work in the built-in spentnuclear fuel of described containment pond is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system of spentnuclear fuel pond (1) is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown; Meanwhile, the normal cooling system of spentnuclear fuel pond (1) is lost; Because spentnuclear fuel pond (1) discharges decay heat, spentnuclear fuel pond (1) coolant-temperature gage rises and start vaporizer gradually, and spentnuclear fuel pond (1) water level declines; When spentnuclear fuel pond (1) water level drops to certain level, trigger valve (5) unlatching that connects containment inner water-tank (2) and spentnuclear fuel pond (1), containment inner water-tank (2) carries out moisturizing for spentnuclear fuel pond (1);
(3) when there is minor break forfeiture cooling medium accident and station blackout, cooling medium in reactor pressure vessel (9) spurts to containment (3), reactor shutdown, the unloading pressure means of reactor pressure vessel (9) is opened, reactor pressure vessel (9) pressure drops to and containment (3) pressure equilibrium gradually, the water of containment inner water-tank (2) starts injection pressure container, is reactor core moisturizing, keeps core deluge; Meanwhile, the normal cooling system of spentnuclear fuel pond (1) is lost, and spentnuclear fuel pond (1) water level declines, and triggers valve (5) and open while reaching certain water level, and containment inner water-tank (2) is the moisturizing of spentnuclear fuel pond, keeps flooding of spentnuclear fuel;
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond (1) is heated to be steam, wherein a part rises to containment (3) top, in containment (3) inwall condensation, condensate water flows down and is collected by condensate collector (4) along containment inwall, flow in containment inner water-tank (2); The water of another part other position condensation in containment (3) drops down onto ground in containment (3) due to gravity, and be connected to containment inner water-tank (2) outlet conduit (6) by recirculation port (7), like this, all condensate waters finally can re-inject reactor core and spentnuclear fuel pond (1) by containment outlet conduit (6), for reactor core and spentnuclear fuel pond (1) provide long-term cooling; Heat reaches containment cooling pond (10) by containment (3), containment cooling pond (10) water temperature raises and start vaporizer, and heat is passed to ultimate heat sink, and containment cooling pond (10) water level declines, when water is evaporated soon, refrigerating mode starts to be transitioned into air-cooled; In reactor building (13), be provided with fair water fin (11), to form the air flow channel of cooling containment (3), improve air-cooling efficiency; Air is entered by the air intake opening (14) of reactor building (13), walk around fair water fin (11) and enter fair water fin inner flow passage, for containment (3) surface provides air cooling, heated air flows out reactor building (13) from the gas outlet (12) at reactor building (13) top, continues cooling containment; The Capacity design of containment inner water-tank (2) is for keeping all the time reactor cavity and spentnuclear fuel pond (1) to flood.
5. the built-in spentnuclear fuel of containment according to claim 1 pond, is characterized in that: described containment cooling system (8) comprises fair water fin (11), gas outlet (12); Reactor building (13), air intake opening (14), spray water tank (15), spray thrower (16); Described containment (3) is positioned at reactor building (13), and reactor building (13) top is provided with spray water tank (15), and the bottom of spray water tank (15) is provided with spray thrower (16), and spray thrower (16) is positioned at containment (3) top; In reactor building (13) and containment (3) surrounding be provided with fair water fin (11), reactor building (13) top has air intake opening (14), reactor building (13) top has gas outlet (12).
6. according to the built-in spentnuclear fuel of the containment described in claim 1 or 4 pond, it is characterized in that: the interior bottom of described containment inner water-tank (2) is integrated with spentnuclear fuel pond (1).
7. the built-in spentnuclear fuel of containment according to claim 6 pond, is characterized in that: the course of work in the built-in spentnuclear fuel of described containment pond is as follows:
(1) when there is the other accident of non-station blackout, the normal cooling system of spentnuclear fuel pond (1) is normally worked, and guarantees the safety in spentnuclear fuel pond;
(2) when there is the accident of station blackout, reactor shutdown; Meanwhile, the normal cooling system of spentnuclear fuel pond (1) is lost; Because spentnuclear fuel pond (1) discharges decay heat, spentnuclear fuel pond (1) coolant-temperature gage rises and start vaporizer gradually, and the water loading amount of containment inner water-tank (2) guarantees that the spentnuclear fuel in spentnuclear fuel pond (1) can be not exposed;
(3) when there is minor break forfeiture cooling medium accident and station blackout, cooling medium in reactor pressure vessel (9) spurts to containment (3), reactor shutdown, the unloading pressure means of pressure vessel is opened, the high pressure of reactor and middle pressure water charging system are reactor core moisturizing in succession, reactor pressure vessel (9) pressure drops to and containment (3) pressure equilibrium gradually, the water of containment inner water-tank (2) starts piii reactor pressure vessel (9), for reactor core moisturizing, keep core deluge; In this simultaneously, because spentnuclear fuel is placed and containment inner water-tank (2) bottom, within the longer time, do not need moisturizing can keep spentnuclear fuel to flood;
(4) due to the decay heat of reactor core and spentnuclear fuel, water in reactor core and spentnuclear fuel pond is heated to be steam, wherein a part rises to containment (3) top, in containment (3) inwall condensation, condensate water flows down and is collected by condensate collector (4) along containment (3) inwall, flow in containment inner water-tank (2); The water of another part other position condensation in containment (3) drops down onto ground in containment (3) due to gravity, and be connected to containment inner water-tank (2) outlet conduit (6) by recirculation port (7), like this, all condensate waters finally can again enter containment inner water-tank (2) and flood spentnuclear fuel, and can re-inject reactor core, for reactor core and spentnuclear fuel pond (1) provide long-term cooling; Heat is passed to ultimate heat sink by spray thrower (16); When in spray water tank (15), water is used up, refrigerating mode starts to be transitioned into air-cooled; In reactor building (13), be provided with fair water fin (11), to form the air flow channel of cooling containment, improve air-cooling efficiency; Air is entered by the air intake opening (14) of reactor building (13), walk around fair water fin (11) and enter fair water fin inner flow passage, for containment (3) surface provides air cooling, heated air flows out reactor building (13) from the gas outlet (12) at reactor building (13) top, continues cooling containment (3); The Capacity design of containment inner water-tank (2) is for keeping all the time reactor cavity and spentnuclear fuel to flood.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104167230A (en) * | 2014-07-30 | 2014-11-26 | 中科华核电技术研究院有限公司 | Passive concrete containment cooling system |
| CN105047237A (en) * | 2015-07-21 | 2015-11-11 | 中国核电工程有限公司 | Spent fuel pool spray cooling system capable of combining active mode with passive mode and control method thereof |
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| CN105047237A (en) * | 2015-07-21 | 2015-11-11 | 中国核电工程有限公司 | Spent fuel pool spray cooling system capable of combining active mode with passive mode and control method thereof |
| CN108766596A (en) * | 2018-04-25 | 2018-11-06 | 中国核电工程有限公司 | Spent Fuel Pool cooling system built in a kind of containment |
| CN108766596B (en) * | 2018-04-25 | 2021-06-25 | 中国核电工程有限公司 | Cooling system for containment built-in spent fuel pool |
| CN109065192A (en) * | 2018-06-28 | 2018-12-21 | 中国核电工程有限公司 | A kind of reactor building method for arranging |
| CN109065192B (en) * | 2018-06-28 | 2021-11-16 | 中国核电工程有限公司 | Reactor plant layout method |
| CN109859873A (en) * | 2019-01-14 | 2019-06-07 | 国核工程有限公司 | A kind of cooling device of spent fuel dry-type storage module |
| CN112037949A (en) * | 2020-09-09 | 2020-12-04 | 三门核电有限公司 | Method for executing cap buckling after loading in AP1000 containment overall leakage rate test |
| CN112037949B (en) * | 2020-09-09 | 2022-05-13 | 三门核电有限公司 | Method for executing cap buckling after loading in AP1000 containment overall leakage rate test |
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