CN104183282A - Spent fuel pool based on design of external interference - Google Patents
Spent fuel pool based on design of external interference Download PDFInfo
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- CN104183282A CN104183282A CN201310191382.6A CN201310191382A CN104183282A CN 104183282 A CN104183282 A CN 104183282A CN 201310191382 A CN201310191382 A CN 201310191382A CN 104183282 A CN104183282 A CN 104183282A
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- spent fuel
- heat transfer
- tank
- fuel pool
- transfer plate
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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 relates to a spent fuel pool which has capability of dealing with serious accidents and is based on the design idea of external interference. The structure of the spent fuel pool comprises a hot tank for storing newly-removed spend fuel, a cold tank for storing spend fuel which has been stored for a period of time and a collecting tank for collecting condensed water. Cooling water of the cold tank and cooling water of the collecting tank are communicated with each other through an opening at the bottom of a separator plate between the two tanks. Cooling water of the cold tank and cooling water of the hot tank are communicated with each other through a separator plate between the two tanks. A first heat transfer plate is slantly arranged above the hot tank, the cold tank and the collecting tank. A second heat transfer plate is slantly disposed on the outside of the collecting tank. The two heat transfer plates separate the spent fuel pool from an external interference tank. Under conditions of serious accidents, water is injected to the external interference tank from the outside world to form natural circulation in the spent fuel pool, and decay heat in the spent fuel pool is transferred to cooling water of the external interference tank through evaporation and condensation and is dissipated through heat transfer between the surface of the external interference tank and the environment. Thus, overheating, overpressure and hydrogen gathering at a fuel plant are prevented.
Description
Technical field
The present invention relates to reactor designing technique, be specifically related to a kind of design of Spent Fuel Pool.
Background technology
Traditional design is still continued to use in the design of typical non-active nuclear power plant Spent Fuel Pool, and for being similar to the so long-term power cut-off incident of Fukushima nuclear power station, its countermeasure is:
When losing AC power (factory's dispatch from foreign news agency and two diesel-driven generators), the thermal capacity of Chi Zhongshui can maintain the cooling of fuel.The steam of pond surface evaporation is discharged to outside factory in atmosphere by ad hoc release screen.The release concentration of plant property line is the very fraction of prescribed limits.During power plant long-term power-off, the moisturizing of Spent Fuel Pool obtains from the relevant moisturizing joint of safety of the Seismic of Passive containment cooling system, and this joint is positioned at auxiliary plant, the come-at-able region of operations staff while seething with excitement in pond.
When the cooling this unlikely event of normal Spent Fuel Pool is lost in continuity, the relevant water level instrument of safety is reported to the police master-control room, and notifies operations staff to start moisturizing, and moisturizing makes water level in water pool remain on fuel assembly at least 7 days above.Starting in 72 hours, the water source moisturizing of being correlated with by safety, during 72 hours to 7 days, by the moisturizing of Passive containment cooling system auxiliary water tank.
Be similar in Fukushima nuclear power plant accident situation the long-term cooling auxiliary water tank of placing hope on Passive containment cooling system of Spent Fuel Pool.
Spent Fuel Pool moisturizing in Spent Fuel Pool cooling system, and the moisturizing of Passive containment cooling system all needs personnel's manual operation related valve.When having an accident, also likely radioactivity is too high and personnel should not be approached in valve operation district, causes moisturizing difficulty.
If the moisturizing water yield requires to have surpassed safe relevant water source between 72 hours to 7 days, Spent Fuel Pool moisturizing is provided by the additional storage water tank of Passive containment cooling system.But the auxiliary reserve tank of Passive containment cooling system is to need active pump that power is provided.Although pump has the power supply of emergency diesel-oil machine, under Dan Quan factory dead electricity accident, probably cannot move.
In accident after 72 hours, if generation beyond design basis accident, auxiliary diesel engine and auxiliary diesel all cannot start, Passive containment cooling system ebullator will cannot be worked because of dead electricity, Passive containment cooling system will lose cooling containment and to the function of Spent Fuel Pool moisturizing, propelling along with accident process, once fuel assembly meltdown and hydrogen occur to be discharged, relative closure does not but have the fuel factory building that the hydrogen facility that disappears is set very likely to occur hydrogen gathering, and hydrogen explosion occurs then.
The existence of the problems referred to above is relevant for the level of understanding of nuclear power plant's accident with industry before Fukushima, Japan accident, seriousness in view of No. four unit failures of Fukushima, Japan nuclear power plant, must reappraise to these problems, specific aim analysis, and effective solution is proposed.
" foreign intervention " thus refer to that the various resources that can utilize outside nuclear power plant's manpower material resources intervene the ability of alleviating damage sequence to nuclear power plant.Design of nuclear power plant based on " foreign intervention " thought is exactly at the beginning of nuclear power station design, just to set up in advance the contact channel of nuclear power plant and external resource more fully, realizes effective " foreign intervention " more by these channels when accident occurs.
The present invention is based on " foreign intervention " thought, for Spent Fuel Pool reply major accident has proposed realistic plan.
Summary of the invention
The object of the invention is on the basis of existing Spent Fuel Pool design, the design philosophy in conjunction with " non-active " and " foreign intervention ", provides a kind of novel Spent Fuel Pool structure, to guarantee the security of spent fuel storage system under major accident.
Technical scheme of the present invention is as follows: a kind of Spent Fuel Pool based on " foreign intervention " design, comprise hot pond for storing the spentnuclear fuel newly drawing off, for storing, store the cold drop of spentnuclear fuel after a while, for collecting the collecting tank of condensate water, described hot pond, cold drop and collecting tank is separated by dividing plate successively, the chilled water of cold drop and collecting tank is by the lower partition open communication between two ponds, and the dividing plate that the chilled water in cold drop and hot pond covers between two ponds is communicated with; Above Re Chi, cold drop and collecting tank, be obliquely installed the first heat transfer plate, the first heat transfer plate is positioned at one end of top, hot pond higher than the one end that is positioned at collecting tank top, in the outside of collecting tank, be obliquely installed the second heat transfer plate, the first heat transfer plate and the second heat transfer plate separate Spent Fuel Pool and foreign intervention pond.
Further, the Spent Fuel Pool based on " foreign intervention " design as above, wherein, the spentnuclear fuel of storing in described cold drop is for having stored the spentnuclear fuel of a refulling cycle.
Further, the Spent Fuel Pool based on " foreign intervention " design as above, wherein, the water level of the chilled water in described foreign intervention pond is higher than the upper level of the first heat transfer plate.Height between the first heat transfer plate and hot pond and cold drop liquid level is by the total amount of fuel type and storage and calculate decision in conjunction with thermal technology.
Further, the Spent Fuel Pool based on " foreign intervention " design as above, wherein, the first described heat transfer plate and the second heat transfer plate are steel plate.
Further, the Spent Fuel Pool based on " foreign intervention " design as above wherein, is respectively equipped with spent fuel storage rack in described hot pond and cold drop, and spent fuel storage rack bottom is provided with cooling water inlet, and top is provided with coolant outlet.
In addition, the Spent Fuel Pool cooling water system being comprised of pump and heat exchanger required under reactor nominal situation retains, minute pond stores and heat transfer plate setting was only lost efficacy and when personnel cannot approach at Spent Fuel Pool cooling system, makes the spontaneous formation Natural Circulation of Spent Fuel Pool and the measure taked.
Beneficial effect of the present invention is as follows: the present invention is by the spentnuclear fuel newly drawing off and stored the spentnuclear fuel minute pond of a period of time and stored, utilize thermal insulation board to mark off the runner of Natural Circulation, adopt the steel plate of two inclinations that Spent Fuel Pool and foreign intervention pond are separated, side plate forms collecting pit with contiguous dividing plate, and top board is as the passage of spentnuclear fuel pond and the heat transfer of foreign intervention pond.Foreign intervention pond becomes ultimate heat sink, and can be that foreign intervention pond is carried out uninterrupted moisturizing and made it all the time in full water state by helicopter or remote control fire truck, the inner Natural Circulation that forms in spentnuclear fuel pond, by evaporation and coagulation, the waste heat in spentnuclear fuel pond is derived, guaranteed the safety of spentnuclear fuel in pond.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of Spent Fuel Pool of the present invention.
In figure, 1. hot pond 2. cold drop 3. collecting tank 4. foreign intervention pond 5. dividing plate 6. dividing plate 7. first heat transfer plate 8. second heat transfer plate 9. spent fuel storage racks
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, Spent Fuel Pool based on " foreign intervention " design provided by the present invention comprises hot pond 1 for storing the spentnuclear fuel newly drawing off, for storing, stored after a while the cold drop 2 of the spentnuclear fuel of (for example a refulling cycle, common 18 months), for collecting the collecting tank 3 of condensate water.Between described hot pond 1 and cold drop 2, by dividing plate 6 separation, cold drop 2 is separated by dividing plate 5 with collecting tank 3.The chilled water of cold drop 2 and collecting tank 3 is communicated with by dividing plate 5 lower openings between two ponds, and the dividing plate 6 that the chilled water in cold drop 2 and hot pond 1 covers between two ponds is communicated with.Above hot pond 1, cold drop 2 and collecting tank 3, be obliquely installed the first heat transfer plate 7, the first heat transfer plate 7 is positioned at one end of 1 top, hot pond higher than the one end that is positioned at collecting tank 3 tops, is convenient to collecting tank 3, reflux at the condensed condensing droplet of the first heat transfer plate 7 from the steam of hot pond 1 evaporation.In the outside of collecting tank 3, being obliquely installed the second heat transfer plate 8, the first heat transfer plates 7 and the second heat transfer plate 8 separates Spent Fuel Pool and foreign intervention pond 4.Between the second heat transfer plate 8 and dividing plate 5, form the scope of collecting tank 3.
In foreign intervention pond 4, fill with chilled water, the water level of the chilled water in foreign intervention pond 4 is higher than the upper level of the first heat transfer plate 7.In a side of the second heat transfer plate 8, the chilled water in foreign intervention pond 4 can with collecting tank in chilled water conduct heat.The first heat transfer plate 7 and the second heat transfer plate 8 are steel plate, when guaranteeing rigidity, are beneficial to the transmission of heat.
The design of the present invention to the above-mentioned feature in spentnuclear fuel pond, its aim is when keeping traditional spentnuclear fuel pond to design, and according to the Experience Feedback of Fukushima event, tackles the improvement of major accident." keep original design " and refer to the scheme of the intensive storage of spentnuclear fuel, the manufacture of bunkering screen work, the cooling system under normal operating condition and cleaning system do not change.
When occurring being similar to Fukushima nuclear power station same case, be that long-term dead electricity and operations staff are when cannot closely intervene spentnuclear fuel pond, temperature in spentnuclear fuel pond can sharply raise (for Ling Ao nuclear power plant spentnuclear fuel pond, when total loss component cooling water system (RRI) or reactor and Spent Fuel Pool cooling system (PTR) pump, in the storage fuel situation of 13 1/3 reactor cores, 65 ℃ of spentnuclear fuel pond initial temperatures reach full heap boiling only needs 7.5 hours).Because the spentnuclear fuel in hot pond 1 has higher heat release density relatively with respect to cold drop 2, to first there is boiling in so hot pond 1, after producing that water vapor contacts with top board (the first heat transfer plate 7) and carry out heat exchange with the cold water in foreign intervention pond 4, boiling will be condensed into droplet, then on the top board tilting, to collect and flows to be the side plate (the second heat transfer plate 8) of inclination to droplet equally, always cooling by top board and finally flow into collecting tank 3 in flow process, the opening of the chilled water that collecting tank is 3 li by heat transfer dividing plate 5 bottoms enters cold drop 2 bottoms in irradiated fuel store pond and from the bottom inlet of spent fuel storage rack 9, enters spent fuel storage rack by Natural Circulation and heated by spentnuclear fuel, then from the top outlet of spent fuel storage rack 9, flow out, thereby enter cold drop 2 tops, top through dividing plate 6 enters hot pond 1, due to the water temperature in the relatively hot pond of its temperature or on the low side, therefore, the water body that enters hot pond 1 from cold drop 2 can flow to due to density difference the bottom in hot pond 1, thereby complete a complete cyclic process.Foreign intervention pond 4 becomes ultimate heat sink, and can be that foreign intervention pond 4 is carried out uninterrupted moisturizing and made it all the time in full water state by helicopter or remote control fire truck.
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 (5)
- One kind based on " foreign intervention " design Spent Fuel Pool, it is characterized in that: comprise hot pond (1) for storing the spentnuclear fuel newly drawing off, for storing, store the cold drop (2) of spentnuclear fuel after a while, for collecting the collecting tank (3) of condensate water, described hot pond (1), cold drop (2) and collecting tank (3) are separated by dividing plate successively, the chilled water of cold drop (2) and collecting tank (3) is communicated with by dividing plate (5) lower openings between two ponds, and the dividing plate (6) that the chilled water of cold drop (2) He Rechi (1) covers between two ponds is communicated with; In Re Chi (1), cold drop (2) and collecting tank (3) top, be obliquely installed the first heat transfer plate (7), the first heat transfer plate (7) is positioned at one end of top, hot pond (1) higher than the one end that is positioned at collecting tank (3) top, in the outside of collecting tank (3), be obliquely installed the second heat transfer plate (8), the first heat transfer plate (7) and the second heat transfer plate (8) separate Spent Fuel Pool and foreign intervention pond (4).
- 2. the Spent Fuel Pool based on " foreign intervention " design as claimed in claim 1, is characterized in that: the spentnuclear fuel of storing in described cold drop (2) is for having stored the spentnuclear fuel of a refulling cycle.
- 3. the Spent Fuel Pool based on " foreign intervention " design as claimed in claim 1, is characterized in that: the water level of the chilled water in described foreign intervention pond (4) is higher than the upper level of the first heat transfer plate (7).
- 4. the Spent Fuel Pool based on " foreign intervention " design as described in any one in claim 1-3, is characterized in that: described the first heat transfer plate (7) and the second heat transfer plate (8) are steel plate.
- As described in any one in claim 1-3 based on " foreign intervention " design Spent Fuel Pool, it is characterized in that: in described hot pond (1) and cold drop (2), be respectively equipped with spent fuel storage rack (9), spent fuel storage rack (9) bottom is provided with cooling water inlet, and top is provided with coolant outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191382.6A CN104183282B (en) | 2013-05-22 | 2013-05-22 | Spent fuel pool based on design of external interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310191382.6A CN104183282B (en) | 2013-05-22 | 2013-05-22 | Spent fuel pool based on design of external interference |
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| Publication Number | Publication Date |
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| CN104183282A true CN104183282A (en) | 2014-12-03 |
| CN104183282B CN104183282B (en) | 2017-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310191382.6A Active CN104183282B (en) | 2013-05-22 | 2013-05-22 | Spent fuel pool based on design of external interference |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016156749A (en) * | 2015-02-25 | 2016-09-01 | 三菱重工業株式会社 | Fuel storage facility |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08304586A (en) * | 1995-05-12 | 1996-11-22 | Toshiba Corp | Spent fuel storage pool and reactor well pool |
| JP2000056073A (en) * | 1998-08-05 | 2000-02-25 | Toshiba Corp | Spent fuel handling facility |
| CN102568622A (en) * | 2012-01-18 | 2012-07-11 | 中科华核电技术研究院有限公司 | Passive cooling system for cooling spent nuclear fuel in nuclear power plant |
| CN102831942A (en) * | 2012-08-28 | 2012-12-19 | 中广核工程有限公司 | Emergency cooling system of spent fuel pool of nuclear power station |
| CN103021487A (en) * | 2012-11-27 | 2013-04-03 | 中国核电工程有限公司 | Cooling and purifying system of spent fuel pool |
-
2013
- 2013-05-22 CN CN201310191382.6A patent/CN104183282B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08304586A (en) * | 1995-05-12 | 1996-11-22 | Toshiba Corp | Spent fuel storage pool and reactor well pool |
| JP2000056073A (en) * | 1998-08-05 | 2000-02-25 | Toshiba Corp | Spent fuel handling facility |
| CN102568622A (en) * | 2012-01-18 | 2012-07-11 | 中科华核电技术研究院有限公司 | Passive cooling system for cooling spent nuclear fuel in nuclear power plant |
| CN102831942A (en) * | 2012-08-28 | 2012-12-19 | 中广核工程有限公司 | Emergency cooling system of spent fuel pool of nuclear power station |
| CN103021487A (en) * | 2012-11-27 | 2013-04-03 | 中国核电工程有限公司 | Cooling and purifying system of spent fuel pool |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016156749A (en) * | 2015-02-25 | 2016-09-01 | 三菱重工業株式会社 | Fuel storage facility |
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| CN104183282B (en) | 2017-02-08 |
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