CN203134388U - Large passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion chamber - Google Patents
Large passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion chamber Download PDFInfo
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- CN203134388U CN203134388U CN2013200072034U CN201320007203U CN203134388U CN 203134388 U CN203134388 U CN 203134388U CN 2013200072034 U CN2013200072034 U CN 2013200072034U CN 201320007203 U CN201320007203 U CN 201320007203U CN 203134388 U CN203134388 U CN 203134388U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model provides a large passive pressurized water reactor nuclear power plant reactor core catcher with a melt expansion chamber. The large passive pressurized water reactor nuclear power plant reactor core catcher comprises a reactor chamber cladding the middle lower part of a reactor pressure vessel, wherein the lower part of the reactor chamber is provided with a reactor chamber concrete floor, the lower part of the reactor chamber concrete floor is provided with a reactor chamber infusible layer, the upper end of an inclined melt release channel is communicated with the reactor chamber infusible layer at the lower part of the reactor chamber, the lower end of the inclined melt release channel is communicated with the melt expansion chamber, the inner wall of the melt release channel surrounds the infusible layer, the lower part of the melt expansion chamber is provided with an expansion chamber concrete floor, the lower part of the expansion chamber concrete floor is provided with an expansion infusible layer, the lower part of the expansion chamber infusible layer is provided with an expansion chamber external cooling channel, and two ends of the expansion chamber external cooling channel, extend outwards, are respectively provided with an outer cooling channel inlet and an outer cooling channel outlet. The large passive pressurized water reactor nuclear power plant reactor core catcher is used for successful implementation of expanding, detaining and cooling on a melt when the pressure vessel fails, thus being capable of enhancing the ability of a large passive pressurized water reactor nuclear power plant in serious accident relieving.
Description
Technical field
The utility model relates to the reactor core drip catcher of large-scale non-active PWR nuclear power plant, particularly relates to the non-active Cooling Design that adopts fused mass propagation chamber, with the further security that improves nuclear power plant.
Background technology
The fused mass that the use of reactor core drip catcher technology can make pressure vessel come out effectively is trapped in a certain device, by adopting corresponding fused mass out-pile cooling technology, can effectively prevent reactor core fused mass and concrete interaction, thereby reduce the risk of containment bottom burn through, and significantly reduce fission product to the release of environment, greatly reduce the radioactivity consequence under the major accident.
In the design of existing non-active PWR nuclear power plant, a lot of severe accident relieving strategies have been adopted.For example in AP1000 nuclear power plant, adopted the technology of being detained (In-vessel retention) in the fused mass heap to guarantee that the reactor pressure vessel low head did not lose efficacy, thereby prevented the interactional generation of out-pile vapour explosion and fused mass and concrete.Yet the success of IVR need meet some requirements.Therefore, IVR also has the risk of inefficacy, after IVR lost efficacy, the reactor core fused mass will discharge to the heap chamber from pressure vessel, if in the heap chamber a large amount of water is arranged, vapour explosion will take place, reactor core fused mass and concrete interaction also take place thereupon, very likely cause a large amount of radiomaterials to discharge to environment.And along with the power of non-active PWR nuclear power plant constantly promotes, the IVR probability of successful also will reduce.Therefore, in large-scale non-active PWR nuclear power plant, can consider to design fused mass out-pile cooling device, when pressure vessel lost efficacy, can effectively be detained and cooling reactor core fused mass at out-pile, prevent the generation of events such as floor burn through.
Summary of the invention
The purpose of this utility model is to provide a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged of expansion, delay and the cooling of successful implementation fused mass when losing efficacy for pressure vessel.
Realize the technical scheme of the utility model purpose: a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged, it comprises the heap chamber of coating reaction core pressure vessel middle and lower part, heap bottom, chamber is heap chamber concrete floor, and heap concrete floor bottom, chamber is heap chamber infusibility layer; The fused mass release channel upper end that is obliquely installed is communicated with the heap chamber infusibility layer of heap bottom, chamber, and the lower end is communicated with fused mass propagation chamber; The inwall of this fused mass release channel is around the infusibility layer; Fused mass propagation chamber bottom is propagation chamber's concrete floor, and propagation chamber concrete floor bottom is propagation chamber's infusibility layer, and propagation chamber infusibility layer bottom is propagation chamber's external refrigeration passage; The propagation chamber outward extending two ends of external refrigeration passage are respectively external refrigeration feeder connection and external refrigeration channel outlet.
Aforesaid a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged, the infusibility layer thickness that the inwall of its described fused mass release channel centers on is 0.1m-0.5m, is made by magnesium oxide or zirconia.
Aforesaid a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged, its described heap chamber infusibility layer thickness is 0.1m-0.5m, magnesium oxide or zirconia are made.
Aforesaid a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged, its described propagation chamber infusibility layer thickness is 0.1m-0.5m, magnesium oxide or zirconia are made.
Effect of the present utility model is: the large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged described in the utility model, and it has fused mass propagation chamber, increases the fused mass heat transfer area, is conducive to the fused mass cooling; External refrigeration adopts non-active design, reliability height.Heap chamber concrete floor serves as expendable material, makes fused mass obtain dilution.Fused mass enters fused mass propagation chamber through the fused mass release channel, and in the fused mass expansion process, propagation chamber's concrete floor has also served as expendable material, by the fused mass expansion, makes the heat transfer area of fused mass increase.By propagation chamber's external refrigeration passage external refrigeration is carried out in the propagation chamber bottom, realize that the out-pile of fused mass is detained, thereby strengthen the ability that large-scale non-active PWR nuclear power plant is alleviated major accident.
Description of drawings
Fig. 1 is the large-scale non-active PWR nuclear power plant reactor core drip catcher structure drawing of device that fused mass propagation chamber is arranged described in the utility model;
Among the figure: the 1-reactor pressure vessel; 2-piles the chamber; 3-heap chamber concrete floor; 4-heap chamber infusibility layer; 5-fused mass release channel; 6-fused mass propagation chamber; 7-propagation chamber concrete floor; 8-propagation chamber infusibility layer; 9-propagation chamber external refrigeration passage; 10-external refrigeration feeder connection; 11-external refrigeration channel outlet.
Embodiment
A kind of there is the large-scale non-active PWR nuclear power plant reactor core drip catcher of fused mass propagation chamber to be further described below in conjunction with the drawings and specific embodiments to described in the utility model.
As shown in Figure 1, a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber arranged described in the utility model mainly comprises heap chamber 2, fused mass release channel 5, fused mass propagation chamber 6 and propagation chamber's external refrigeration passage 9.
Heap 2 coating reaction core pressure vessels, 1 middle and lower part, chamber, heap 2 bottoms, chamber are heap chamber concrete floor 3, heap concrete floor 3 bottoms, chamber are heap chamber infusibility layer 4.These heap chamber infusibility layer 4 thickness be 0.1m-0.5m(for example: 0.1m, 0.3m or 0.5m), magnesium oxide or zirconia are made.
Fused mass release channel 5 upper ends that are obliquely installed are communicated with the heap chamber infusibility layer 4 of heap 2 bottoms, chamber, and the lower end is communicated with fused mass propagation chamber 6; The inwall of this fused mass release channel 5 is around the infusibility layer.This infusibility layer thickness be 0.1m-0.5m(for example: 0.1m, 0.3m or 0.5m), made by magnesium oxide or zirconia.
Fused mass propagation chamber 6 bottoms are propagation chamber's concrete floor 7, and propagation chamber's concrete floor 7 bottoms are propagation chamber's infusibility layer 8, and propagation chamber infusibility layer 8 bottom are propagation chamber's external refrigeration passage 9; Propagation chamber's external refrigeration passage 9 outward extending two ends are respectively external refrigeration feeder connection 10 and external refrigeration channel outlet 11.These propagation chamber's infusibility layer 8 thickness be 0.1m-0.5m(for example: 0.1m, 0.3m or 0.5m), magnesium oxide or zirconia are made.
Above-mentioned heap chamber concrete floor 3 serves as expendable material, melts by concrete, realizes the dilution of fused mass and the temperature of reduction fused mass.Above-mentioned propagation chamber concrete floor 7 also serves as expendable material, melts by concrete, realizes the dilution of fused mass and the temperature of reduction fused mass.
By the outside non-active cooling of propagation chamber's external refrigeration passage 9 realizations to fused mass propagation chamber 6 bottoms.Higher reserve tank carries out the gravity injection to outside cooling duct entrance 10 from the position for it, by absorbing the heat of reactor core drip catcher, steam water interface is gone out from external refrigeration channel outlet 11, and is follow-up through water recovery and collection, be back in the reserve tank again, thereby realize non-active cooling.
When major accident took place in nuclear power plant, reactor core began fusing and caves in, and fused mass accumulates in pressure vessel 1 lower chambers gradually, because the effect of fused mass decay heat causes the pressure vessel low head to lose efficacy, the reactor core fused mass will fall into heap chamber 2.What at first contact with the reactor core fused mass that falls is heap chamber concrete floor 3, and the reactor core fused mass with concrete interaction takes place and causes concrete constantly to melt.In whole process; concrete has played the effect of expendable material; it can play the effect of dilution to the reactor core fused mass; also can reduce the temperature of reactor core fused mass to a certain extent; thermal shock effect in the time of also can alleviating simultaneously fused mass from pressure vessel 1 whereabouts, thus play the effect of protecting other parts of reactor core drip catcher.
Fused mass in the heap chamber discharges to fused mass propagation chamber 6 gradually by the fused mass release channel 5 that tilts.Because fused mass release channel 5 centered on by the infusibility layer on the whole, so fused mass is when passing through fused mass release channel 5, and channel surface can not melted.
Enter the fused mass of propagation chamber 6 can be in propagation chamber 6 expansion gradually, in this process, fused mass also can react with propagation chamber concrete floor 7, at this moment, concrete also plays the effect of sacrifice layer.By the diluting effect of sacrifice layer, melt temperature further reduces, and simultaneously, after the fused mass expansion, the area of dispersion of fused mass further increases, and is equivalent to increase heat transfer area.Propagation chamber's infusibility layer 8 is also arranged at the bottom of propagation chamber's concrete floor 7, and propagation chamber's infusibility layer has played containment role to fused mass, prevents that fused mass from further melting material.
In the cooling duct of propagation chamber infusibility layer 8 bottom, constantly there is chilled water to flow through, the chilled water of cooling duct entrance 10 from the higher water tank in position in the mode of gravity injection to propagation chamber's external refrigeration passage 9 water fillings, chilled water in cooling duct heat absorption rear section evaporation, what come out from external refrigeration channel outlet 11 is steam water interface.Water vapour enters after the containment, carries out condensation by non-passive safety shell cooling system, and condensate water is collected again again enters the chilled water storage case, thereby realizes the Natural Circulation of chilled water-water vapour-chilled water.
By the realization of said apparatus function, fused mass will effectively be detained and be cooled off in propagation chamber, thereby has alleviated the consequence of major accident.
The utility model strictly is not confined to described example.According to the method that the utility model proposes, can be applied to expansion, delay and the cooling of out-pile fused mass of the large-scale non-active PWR nuclear power plant of any power.
Claims (4)
1. large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged, it is characterized in that: it comprises the heap chamber (2) of coating reaction core pressure vessel (1) middle and lower part, heap bottom, chamber (2) is heap chamber concrete floor (3), and heap chamber concrete floor (3) bottom is heap chamber infusibility layer (4);
Fused mass release channel (5) upper end that is obliquely installed is communicated with the heap chamber infusibility layer (4) of heap bottom, chamber (2), and the lower end is communicated with fused mass propagation chamber (6); The inwall of this fused mass release channel (5) is around the infusibility layer;
Fused mass propagation chamber (6) bottom is propagation chamber's concrete floor (7), and propagation chamber's concrete floor (7) bottom is propagation chamber's infusibility layer (8), and propagation chamber's infusibility layer (8) bottom is propagation chamber's external refrigeration passage (9); The outward extending two ends of propagation chamber's external refrigeration passage (9) are respectively external refrigeration feeder connection (10) and external refrigeration channel outlet (11).
2. a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged according to claim 1, it is characterized in that: the infusibility layer thickness that the inwall of described fused mass release channel (5) centers on is 0.1m-0.5m, is made by magnesium oxide or zirconia.
3. a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged according to claim 1, it is characterized in that: described heap chamber infusibility layer (4) thickness is 0.1m-0.5m, and magnesium oxide or zirconia are made.
4. a kind of large-scale non-active PWR nuclear power plant reactor core drip catcher that fused mass propagation chamber is arranged according to claim 1, it is characterized in that: described propagation chamber's infusibility layer (8) thickness is 0.1m-0.5m, and magnesium oxide or zirconia are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200072034U CN203134388U (en) | 2013-01-08 | 2013-01-08 | Large passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion chamber |
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| CN2013200072034U CN203134388U (en) | 2013-01-08 | 2013-01-08 | Large passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion chamber |
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| CN203134388U true CN203134388U (en) | 2013-08-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165198A (en) * | 2013-01-08 | 2013-06-19 | 上海核工程研究设计院 | Large-scale passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion room |
| CN103219047A (en) * | 2013-04-03 | 2013-07-24 | 京东方科技集团股份有限公司 | TFT (thin film transistor) threshold voltage compensation method, TFT (thin film transistor) threshold voltage compensation circuit, shift register and display device |
| CN105551537A (en) * | 2015-12-10 | 2016-05-04 | 中国核电工程有限公司 | Molten core catcher capable of realizing layered forced spreading |
-
2013
- 2013-01-08 CN CN2013200072034U patent/CN203134388U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165198A (en) * | 2013-01-08 | 2013-06-19 | 上海核工程研究设计院 | Large-scale passive pressurized water reactor nuclear power plant reactor core catcher with melt expansion room |
| CN103219047A (en) * | 2013-04-03 | 2013-07-24 | 京东方科技集团股份有限公司 | TFT (thin film transistor) threshold voltage compensation method, TFT (thin film transistor) threshold voltage compensation circuit, shift register and display device |
| CN103219047B (en) * | 2013-04-03 | 2015-09-09 | 京东方科技集团股份有限公司 | TFT threshold voltage compensation circuit and method, shift register and display device |
| CN105551537A (en) * | 2015-12-10 | 2016-05-04 | 中国核电工程有限公司 | Molten core catcher capable of realizing layered forced spreading |
| CN105551537B (en) * | 2015-12-10 | 2020-03-24 | 中国核电工程有限公司 | Reactor core melt catcher capable of being forcedly spread in layered mode |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |