CN105551537A - Molten core catcher capable of realizing layered forced spreading - Google Patents
Molten core catcher capable of realizing layered forced spreading Download PDFInfo
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- CN105551537A CN105551537A CN201510908289.1A CN201510908289A CN105551537A CN 105551537 A CN105551537 A CN 105551537A CN 201510908289 A CN201510908289 A CN 201510908289A CN 105551537 A CN105551537 A CN 105551537A
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- drip catcher
- cover plate
- fused mass
- base plate
- catcher
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
- G21C9/016—Core catchers
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
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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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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention specifically relates to a molten core catcher capable of realizing layered forced spreading, which belongs to the technical field of nuclear reactor safety. The molten core catcher comprises a melt spreading chamber connected with a reactor pit through a melt transferring channel and is characterized in that the interior bottom surface of the melt spreading chamber is provided with a catcher base plate capable of bearing melts conveyed by the melt transferring channel and a group of catcher cover plates arranged above the catcher base plate in a laminated way and provided with catcher cover plate vent holes; the catcher base plate and the catcher cover plates are connected through a plurality of directional cover plate falling supports; and the catcher cover plates can cover the catcher base plate. Conventional melt catchers cannot realize uniform spreading of molten cores and maximum conduction of the heat of melts. The molten core catcher provided by the invention realizes uniform spreading of melts, increases a heat exchanging area, is favorable for improving the removal power of decay heat of the melts and prevents failure of a protective barrier caused by local overheating.
Description
Technical field
The invention belongs to nuclear reactor safety technical field, be specifically related to the reactor core fused mass drip catcher that a kind of layering is forced to sprawl.
Background technology
After the major accident of Three Mile Island and Chernobyl Plant, nuclear power circle starts to concentrate strength on to alleviate the prevention of major accident and consequence study and tackle key problems, and many conclusions specify that to be taken precautions against and alleviate major accident, improve safe reliability and improve the requirement of the aspects such as Human Engineering.When pressurized-water reactor nuclear power plant generation major accident, the forfeiture that residual heat of nuclear core discharges means will make refrigerant evaporates exhaust, Core uncovering is also persistently overheating, fuel element melts owing to losing cooling, reactor core fused mass falls into pressure vessel (RPV) lower chambers, then build-up of pressure container Lower head failure, if can not adopt an effective measure to its cooling, reactor core fused mass is likely by pressure vessel burn through.After pressure vessel burn through, fused mass be directly injected on containment raft foundation interact (MCCI) with structural concrete, in certain hour with the raft foundation of the downcutting containment gradually of speed faster, if raft foundation thickness is not enough, then base plate may be fused, and cause the integrity violations of containment, radiomaterial directly will enter soil subsequently, environment is caused to having a strong impact on.In order to avoid the extensive radiomaterial release that reactor core fused mass causes, the relevant design of reactor core catcher produces gradually.At present under major accident, the cooling of reactor core fused mass and collection strategy mainly can be divided into two kinds: the cooling of fused mass and maintenance (IVR) in pressure vessel, employing in the AP1000 type of the U.S. designs; The outer fused mass cooling of pressure vessel and collection (EVR), adopt in Muscovite WWER1000 type with the EPR type of France.WWER1000 type adopts " crucible " formula reactor core catcher, and it is positioned at one of pressure vessel bottom independently structure of container, forms primarily of lower shoe, expendable material and fan-shaped heat exchanger.EPR type adopts " sprawling " formula reactor core catcher, in major accident situation, reactor core forms the liquid fused mass that can flow, flow directly in reactor pit, under high temperature action, fused mass and reactor pit sacrificial concrete react, melt sacrificial concrete gradually, reach preliminary cooling, collect the function of fused mass.
About the research of reactor core catcher, external starting comparatively early, Patents is more, as: masschusetts, u.s.a Polytechnics was in the patent of 1978, Corecatcherfornuclearreactorcoremeltdowncontainment (US4113560), this patent can be considered the design blank of EVR, France International Atomic Energy Agency in the patent of 1981, Corecatcherdevice (US4280872), EVR skill upgrading has been arrived the level of engineer applied by this patent, the patent of nineteen eighty-two, Moltencorecatcherandcontainmentheatremovalsystem (US4342621) proposes hot pipe technique to be used for EVR, the patent of USDOE's nineteen eighty-three, Combinationpiperupturemitigatorandin-vesselcorecatcher (US4412969), proposes the concept of IVR first, in addition Patents also has Retrofittablenuclearreactorcorecatcher (US4442065), Nuclearreactorequippedwithacorecatcher (US5263066), Nuclearreactorinstallationwithacorecatcherdeviceandmetho dforexteriorcoolingofthelatterbynaturalcirculation (US5343506), Corecatchercoolingbyheatpipe (US6353651), CorecatcherCooling (US7558360), Corecatcher, manufacturingmethodthereof, reactorcontainmentvesselandmanufacturingmethodthereof (US8358732) etc.China increases after introducing WWER nuclear power system from Russia gradually to the research of reactor core catcher, a series of patent is defined after introduction U.S. AP1000 nuclear power technology, as: Russia's patent in China's application in 2007, the lining location of the LWR nuclear reactor damaged and cooling system (CN200410031091.1), this patent is the EVR scheme of WWER; The patented technology that middle nuclear industry 23 Construction Company Limited is formed for 2010 in WWER work progress, a kind of installation method (CN201010529073.1) of reactor core catcher of nuclear power station; Korea Hydro & Nuclear Power Co's patent of 2010, has the reactor core catcher (CN201080068588.4) of integrated cooling duct, and its purport is cooling fused mass being covered to base plate; the EVR technology that Shanghai Institute of Nuclear Engineering is formed gradually in AP1000 import, digestion and absorption and CAP1400 design process, the large-scale passive nuclear plant reactor core catcher (CN201310005308.0) of bottom water injection superposition external refrigeration, a kind of large-scale passive PWR nuclear power plant crucible-type reactor core breaks storage (CN201310005342.8), there is the large-scale passive PWR nuclear power plant reactor core catcher (CN201310005579.6) of fused mass propagation chamber, be detained with out-pile the device (CN201310264749.2) combined in large-scale passive nuclear plant fused mass heap, there is the large-scale passive PWR nuclear power plant reactor core catcher (CN201320007203.4) of fused mass propagation chamber, a kind of large-scale passive PWR nuclear power plant may exhaust type reactor core catcher (CN201320007218.0), be detained with out-pile the device (CN201320007347.X) combined in large-scale passive nuclear plant fused mass heap, the large-scale passive nuclear plant reactor core catcher (CN201320007522) of bottom water injection superposition external refrigeration.
Above-mentioned all reactor core catcher Patents are not all considered to adopt layering to force to sprawl the abundant expansion that means realize fused mass, thus make fused mass heat derive maximization.
Summary of the invention
For the deficiency existing for currently used reactor core fused mass drip catcher, and fused mass cools the problem of aspect, be necessary that design is a kind of and possess the fused mass drip catcher forcing to sprawl function, fused mass can be sprawled more reliably, it is made fully to launch, increase the heat exchange area of fused mass, improve fused mass rate of heat exchange, better cooling down is carried out to fused mass.
For reaching above object, the technical solution used in the present invention is the reactor core fused mass drip catcher that a kind of layering is forced to sprawl, comprise the fused mass propagation chamber by transfer of melt expanding channels reactor pit, wherein, the drip catcher base plate of the fused mass that can carry the conveying of described transfer of melt passage is provided with in the inner bottom surface of described fused mass propagation chamber, the stacked one group of drip catcher cover plate with drip catcher cover plate through hole be arranged on above described drip catcher base plate, described drip catcher base plate, drip catcher cover plate is connected by several cover plate whereabouts directional supports, the described drip catcher cover plate being positioned at upper strata can cover described drip catcher base plate or be positioned on the described drip catcher cover plate of below.
Further,
Described drip catcher sole periphery edge is provided with drip catcher base plate profile convex edge, inner panel face is provided with some drip catcher base plates projection and drip catcher base plate depression;
The periphery sides of the upper surface of described drip catcher cover plate, along being provided with convex edge on drip catcher cover plate profile, upper surface inner panel face is provided with some drip catcher cover plates projection and drip catcher cover plate depression; The periphery sides of the lower surface of described drip catcher cover plate, along being provided with convex edge under drip catcher cover plate profile, lower surface inner panel face being provided with some outstanding drip catcher cover board grilles downwards, forming fused mass and sprawl chamber described in each between drip catcher cover board grille;
Described fused mass sprawls the drip catcher cover plate projection that chamber can hold the described drip catcher base plate projection on described drip catcher base plate or be positioned on the described drip catcher cover plate of below; Described drip catcher base plate depression, drip catcher cover plate depression can hold the described drip catcher cover board grille of the described drip catcher cover plate of top;
Under described drip catcher base plate profile convex edge, drip catcher cover plate profile, convex edge can compact siro spinning technology, forms a fused mass and sprawl space between described drip catcher cover plate, drip catcher base plate; Under the described drip catcher cover plate profile of the described drip catcher cover plate on upper strata the described drip catcher cover plate of convex edge and lower floor described drip catcher cover plate profile on convex edge can compact siro spinning technology, form a fused mass between upper and lower two described drip catcher cover plates and sprawl space; Described fused mass sprawls space by described drip catcher cover plate through hole and ft connection;
The coolant channel through with the inner space of described fused mass propagation chamber is also provided with in described drip catcher base plate, drip catcher cover plate.
Further, described drip catcher cover plate is also provided with some terminal-velocity dampers, for controlling the speed that described drip catcher cover plate falls along described cover plate whereabouts directional support.
Further, described drip catcher base plate, drip catcher cover plate, cover plate whereabouts directional support all adopt resistant to elevated temperatures metal, alloy, nonmetal or compound substance manufacture, the surface of contact or close fused mass or top layer, all adopt tungsten Penetrator or composite silicon carbide ceramic material.
Further, described drip catcher cover plate is also provided with the cover plate release trigger switch controlling described drip catcher cover plate and fall.
Further, described fused mass propagation chamber is also provided with fused mass propagation chamber waterflood-transmission line and fused mass propagation chamber vent passages.
Further, be provided with the reactor pit expendable material of metal alloy in described reactor pit, the junction of described transfer of melt passage and described reactor pit is provided with cheats the end and fuses and fill in.
Further, the total quantity sensor of fused mass overcurrent, transfer of melt channel temperature sensor, transfer of melt passage thermal imaging system is also provided with in described transfer of melt passage; Fused mass propagation chamber thermal imaging system is also provided with in described fused mass propagation chamber.
Further, described cover plate release trigger switch can be triggered according to the total quantity sensor of described fused mass overcurrent, transfer of melt channel temperature sensor, the data-signal of transfer of melt passage thermal imaging system transmission and the burst size of described drip catcher cover plate, also can manually or Remote manual activation, described drip catcher cover plate can discharge one by one, divide into groups release, disposable release.
Beneficial effect of the present invention is:
1. force to sprawl the heat interchanging area by increasing between fused mass and chilled water, being conducive to improving fused mass decay heat derives power, and the protective barrier avoiding local overheating to cause lost efficacy.
2. multilayer is sprawled design and can be made full use of and sprawl the room finite space, and make fused mass spreading area larger, reactor core trapping system is more compact.
3. and the reactor pit expendable material of metal alloy merge after fused mass to be detained between drip catcher base plate and drip catcher cover plate and after cooling, relatively independent metal burden body will be formed, the accident aftertreatment work of reactor will greatly simplify, and the irradiation dose of staff can significantly reduce.
4. adopt metal alloy fused mass total amount can be made significantly to reduce as expendable material, the construction difficulty of reactor core catcher is reduced, and engineering flexibility improves.
5. the non-active fused mass type of cooling is more reliable, the long-term safety of nuclear power plant after making major accident is promoted.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of layering described in the specific embodiment of the invention forces to sprawl the reactor core catcher of fused mass;
Fig. 2 is the schematic diagram of drip catcher base plate described in the embodiment of the present invention one;
Fig. 3 is the upper surface schematic diagram of drip catcher cover plate described in the embodiment of the present invention one;
Fig. 4 is the lower surface schematic diagram of drip catcher cover plate described in the embodiment of the present invention one;
Fig. 5 is the vertical view of drip catcher cover plate described in the embodiment of the present invention one;
Fig. 6 is the side-looking structural drawing of drip catcher cover plate described in the embodiment of the present invention one;
Fig. 7 is the schematic diagram of drip catcher base plate described in the embodiment of the present invention two;
Fig. 8 is the schematic diagram of drip catcher cover plate described in the embodiment of the present invention two;
Fig. 9 is the upper surface side view of drip catcher cover plate described in the embodiment of the present invention two;
Figure 10 is the lower face side view of drip catcher cover plate described in the embodiment of the present invention two;
Figure 11 be closed described in the embodiment of the present invention two after drip catcher cover plate and the schematic diagram of drip catcher base plate.
In figure: 1-reactor pressure vessel, 2-reactor pit, 3-fused mass, 4-reactor pit expendable material, 5-cheats end fusing plug, 6-transfer of melt passage, 7-fused mass propagation chamber, 8-drip catcher base plate, 9-drip catcher cover plate, the total quantity sensor of 10-fused mass overcurrent, 11-cover plate release trigger switch, 12-cover plate whereabouts directional support, 13-chilled water, 14-fused mass propagation chamber vent passages, 15-terminal-velocity damper, 16-transfer of melt channel temperature sensor, 17-transfer of melt passage thermal imaging system, 18-fused mass propagation chamber thermal imaging system, 19-coolant channel, 20-fused mass propagation chamber waterflood-transmission line, 81-drip catcher base plate profile convex edge, 82-drip catcher base plate is protruding, 83-drip catcher base plate caves in, convex edge on 91-drip catcher cover plate profile, 92-drip catcher cover plate is protruding, 93-drip catcher cover plate caves in, convex edge under 94-drip catcher cover plate profile, 95-drip catcher cover plate through hole, 96-fused mass sprawls chamber, 97-drip catcher cover board grille.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, a kind of layering provided by the invention forces the reactor core catcher sprawling fused mass to comprise: by the fused mass propagation chamber 7 of transfer of melt passage 6 coupled reaction heap reactor pit 2, wherein be provided with the drip catcher base plate 8 that can carry the fused mass that transfer of melt passage 6 is carried in the inner bottom surface of fused mass propagation chamber 7, the stacked one group of drip catcher cover plate 9 with drip catcher cover plate through hole 95 be arranged on above drip catcher base plate 8; Connected by several cover plate whereabouts directional supports 12 between drip catcher base plate 8, drip catcher cover plate 9, the drip catcher cover plate 9 being positioned at upper strata can cover on drip catcher base plate 8 or be positioned on the drip catcher cover plate 9 of below.Every block drip catcher cover plate 9 is also provided with several terminal-velocity dampers 15, for controlling the speed that drip catcher cover plate 9 falls along cover plate whereabouts directional support 12.In reactor pit 2, (bottom reactor pit) is provided with the reactor pit expendable material 4 adopting metal alloy to make, and transfer of melt passage 6 and the junction of reactor pit 2 are provided with cheats the end and to fuse plug 5.After fused mass fully merges with reactor pit expendable material 4 in reactor pit 2, then melt and wear the end, hole fusing plug 5, can enter in fused mass propagation chamber 7 through transfer of melt passage 6.
In order to better sprawl fused mass, making fused mass obtain maximum area of dissipation, drip catcher base plate 8 and drip catcher cover plate 9 being provided with some projections and depression and profile convex edge, forming fused mass in order to work in coordination and sprawl space.For drip catcher base plate 8 and drip catcher cover plate 9, the invention provides two kinds of moulding, embodiment one is disc, and embodiment two is rectangle.
In embodiment one:
Drip catcher base plate 8 (referring to Fig. 2) periphery sides, along being provided with drip catcher base plate profile convex edge 81, inner panel face is provided with several polygonal drip catcher base plates protruding 82 and drip catcher base plate depression 83;
As shown in Fig. 3, Fig. 5, the periphery sides of the upper surface of drip catcher cover plate 9 is along being provided with convex edge 91 (protruding upward) on drip catcher cover plate profile, upper surface inner panel face is provided with some drip catcher cover plates protruding 92 and drip catcher cover plate depression 93, drip catcher cover plate through hole 95 is arranged in drip catcher cover plate projection 92; As shown in Figure 4, the periphery sides of the lower surface of drip catcher cover plate 9 is along being provided with convex edge 94 (protruding) under drip catcher cover plate profile downwards, lower surface inner panel face is provided with the drip catcher cover board grille 97 of some downward protrusions, forms fused mass between each drip catcher cover board grille 97 and sprawl chamber 96;
The fused mass of drip catcher cover plate 9 being positioned at top sprawls the drip catcher cover plate projection 92 that chamber 96 can hold the drip catcher base plate protruding 82 on the drip catcher base plate 8 being positioned at below or be positioned on the drip catcher cover plate 9 of below; Drip catcher base plate depression 83, drip catcher cover plate depression 93 can hold the drip catcher cover board grille 97 of the drip catcher cover plate 9 being positioned at top;
As shown in Figure 6, under drip catcher base plate profile convex edge 81, drip catcher cover plate profile, convex edge 94 can compact siro spinning technology (under drip catcher cover plate profile, convex edge 94 overall diameter is less than drip catcher base plate profile convex edge 81 interior diameter), forms a fused mass and sprawl space between the drip catcher cover plate 9 be connected, drip catcher base plate 8; Under the drip catcher cover plate profile of the drip catcher cover plate 9 on upper strata, convex edge 94 and convex edge 91 on the drip catcher cover plate profile of the drip catcher cover plate 9 of lower floor can compact siro spinning technology (under drip catcher cover plate profile, convex edge 94 overall diameter is less than convex edge 94 interior diameter under drip catcher cover plate profile), and the fused mass that forms between two drip catcher cover plates 9 be up and down connected sprawls space; Fused mass after closed sprawls space can only by drip catcher cover plate through hole 95 and ft connection (comprise each fused mass and sprawl being communicated with between space).
In embodiment two:
As shown in Figure 7, drip catcher base plate 8 periphery sides, along being provided with drip catcher base plate profile convex edge 81, inner panel face is provided with several continuous print corrugated drip catcher base plate projection 82 (crest) and drip catcher base plate depression 83 (troughs);
As shown in Figure 8, Figure 9, the periphery sides of the upper surface of drip catcher cover plate 9 is along being provided with convex edge 91 (protruding upward) on drip catcher cover plate profile, upper surface inner panel face is provided with some drip catcher cover plates protruding 92 and drip catcher cover plate depression 93, drip catcher cover plate through hole 95 is arranged in drip catcher cover plate depression 93; As shown in Figure 10, the periphery sides of the lower surface of drip catcher cover plate 9 is along being provided with convex edge 94 (protruding) under drip catcher cover plate profile downwards, lower surface inner panel face is provided with the drip catcher cover board grille 97 of some downward protrusions, forms fused mass between each drip catcher cover board grille 97 and sprawl chamber 96;
The fused mass of drip catcher cover plate 9 being positioned at top sprawls the drip catcher cover plate projection 92 that chamber 96 can hold the drip catcher base plate protruding 82 on the drip catcher base plate 8 being positioned at below or be positioned on the drip catcher cover plate 9 of below; Drip catcher base plate depression 83, drip catcher cover plate depression 93 can hold the drip catcher cover board grille 97 of the drip catcher cover plate 9 being positioned at top;
As shown in figure 11, under drip catcher base plate profile convex edge 81, drip catcher cover plate profile, convex edge 94 can compact siro spinning technology, forms a fused mass and sprawl space between connected drip catcher cover plate 9, drip catcher base plate 8; Under the drip catcher cover plate profile of the drip catcher cover plate 9 on upper strata, convex edge 94 and convex edge 91 on the drip catcher cover plate profile of the drip catcher cover plate 9 of lower floor can compact siro spinning technology, and the connected fused mass that forms between two drip catcher cover plates 9 up and down sprawls space; Fused mass after closed sprawls space can only by drip catcher cover plate through hole 95 and ft connection (comprise each fused mass and sprawl being communicated with between space).
The coolant channel 19 through with the inner space of fused mass propagation chamber 7 is also provided with in drip catcher base plate 8, drip catcher cover plate 9, coolant channel 19 is not sprawled space with fused mass and is communicated with, when injecting cooling medium in fused mass propagation chamber 7, cooling medium can pass through from coolant channel 19.
After storage cover plate 9 and drip catcher base plate 8 close, each between storage cover plate 9 and drip catcher base plate 8 and between drip catcher cover plate 9 and drip catcher cover plate 9 caves in, there is gap between projection and drip catcher cover board grille, fused mass can be extruded by these gaps, realizes the effect forcing to sprawl, increase the heat exchange area of fused mass.
Drip catcher base plate 8, drip catcher cover plate 9, cover plate whereabouts directional support 12 all adopt resistant to elevated temperatures metal, alloy, nonmetal or compound substance manufacture, wherein need to contact or near the surface of fused mass or top layer, all adopt tungsten Penetrator or composite silicon carbide ceramic material.
The total quantity sensor 10 of fused mass overcurrent, transfer of melt channel temperature sensor 16, transfer of melt passage thermal imaging system 17 is also provided with in transfer of melt passage 6; Fused mass propagation chamber thermal imaging system 18 is also provided with in fused mass propagation chamber 7.
Each drip catcher cover plate 9 is provided with the cover plate release trigger switch 11 controlling drip catcher cover plate 9 and fall, the data-signal that cover plate release trigger switch 11 can send according to the total quantity sensor 10 of fused mass overcurrent, transfer of melt channel temperature sensor 16, transfer of melt passage thermal imaging system 17 and the burst size of drip catcher cover plate 9 be triggered, also can manually or Remote manual activation; Drip catcher cover plate 9 can discharge one by one, divide into groups release, disposable release.Drip catcher cover plate 9 relies on gravity fall (falling speed is controlled by terminal-velocity damper 15), and relies on own wt to complete to sprawl operation to the pressure of drip catcher base plate 8 and the Squeezing ground that is positioned at the fused mass on the drip catcher cover plate 9 of lower floor.In addition, sprawl operation to perform pressure more reliably, cover plate release trigger switch 11 can also manually or Remote manual activation.
As shown in Figure 1, a kind of layering provided by the invention forces the reactor core catcher sprawling fused mass to adopt the non-active type of cooling to carry out cooling down to fused mass.Adopt and inject chilled water to fused mass propagation chamber 7, form cooling pond and realize.Concrete scheme is: in fused mass propagation chamber 7, (above such as fused mass propagation chamber 7 top) arranges fused mass propagation chamber waterflood-transmission line 20 and fused mass propagation chamber vent passages 14, in fused mass propagation chamber 7, chilled water is injected by fused mass propagation chamber waterflood-transmission line 20, flood drip catcher base plate 8, the drip catcher cover plate 9 after closing, chilled water enters in the coolant channel 19 of drip catcher base plate 8, drip catcher cover plate 9, taken away the heat of fused mass 3 by the evaporation of chilled water, realize the cooling of fused mass 3.
Sprawl the reactor core catcher of fused mass according to a kind of pressure provided by the present invention, present invention also offers the cooling means that fused mass is sprawled in a kind of pressure, comprise the following steps:
(S1) fused mass having incorporated reactor pit expendable material 4 is slipped on the drip catcher base plate 8 on fused mass propagation chamber 7 inner bottom plating by transfer of melt passage 6;
(S2) cover plate release trigger switch 11 is triggered according to the total quantity sensor 10 of fused mass overcurrent, transfer of melt channel temperature sensor 16, the data-signal of transfer of melt passage thermal imaging system 17 transmission and the burst size of drip catcher cover plate 9, and drip catcher cover plate 9 is discharged downwards; Cover plate release trigger switch 11 also can manually or Remote manual activation;
(S3) drip catcher cover plate 9 falls along cover plate whereabouts directional support 12, and with drip catcher base plate 8 or be positioned at that the drip catcher cover plate 9 of lower floor is closed to be formed closed fused mass and sprawl space, fused mass 3 is forced uniform spreading and sprawls in space at fused mass;
(S4) fused mass propagation chamber waterflood-transmission line 20 starts to inject chilled water to fused mass propagation chamber 7, floods the drip catcher base plate 8 after closing and drip catcher cover plate 9.
Finally illustrate that the practical application of the reactor core fused mass drip catcher sprawled is forced in a kind of layering provided by the present invention.
As shown in Figure 1, when the core meltdown of reactor occurs, fused mass 3 in reactor core melt wear reactor pressure vessel 1 after be slipped to bottom reactor pit 2 lay reactor pit expendable material 4 on, after fused mass 3 fully to merge with reactor pit expendable material 4 and melts and wear reactor pit expendable material 4, start contact hole end fusing plug 5, fusing plug 5 in the end, hole is positioned at the junction bottom transfer of melt passage 6 and reactor pit 2, after fusing plug 5 in the end, hole is melted thing 3 burn through, the fused mass 3 having merged reactor pit expendable material 4 enters in fused mass propagation chamber 7 along transfer of melt passage 6, and be slipped on drip catcher base plate 8, along with fused mass 3 constantly slips into, the total quantity sensor 10 of fused mass overcurrent, transfer of melt channel temperature sensor 16, transfer of melt passage thermal imaging system 17 constantly monitors the situation that fused mass flows into, the parameter such as corresponding feedback data and fused mass state is sent so that cover plate release trigger switch 11 judges whether to trigger to cover plate release trigger switch 11, after cover plate release trigger switch 11 is triggered, drip catcher cover plate 9 is released, to fall along cover plate whereabouts directional support 12 with certain speed under the control of terminal-velocity damper 15 and cover on drip catcher base plate 8, fused mass 3 on extruding drip catcher base plate 8, fused mass 3 is made to be forced to clamp-on drip catcher base plate 8 and drip catcher cover plate 9 and the closed fused mass that formed between drip catcher cover plate 9 and drip catcher cover plate 9 sprawls space.According to the feedback data of each watch-dog above-mentioned, and the burst size of drip catcher cover plate 9, cover plate release trigger switch 11, can select various ways to discharge (comprise discharge one by one, divide into groups to discharge, disposable release) to drip catcher cover plate 9.The fused mass of bottom is sprawled the fused mass that can not hold in space and is entered last layer fused mass by drip catcher cover plate through hole 95 and sprawl in space, until all stacked drip catcher cover plate 9 of all fused mass covers.Chilled water 13 is injected to fused mass propagation chamber 7 subsequently by fused mass propagation chamber waterflood-transmission line 20, cooling pond is formed in fused mass propagation chamber 7, flood the drip catcher base plate 8 after closing and drip catcher cover plate 9, taken away the heat of fused mass 3 by the evaporation of chilled water, realize the cooling of fused mass 3.Because fused mass 3 has merged the reactor pit expendable material 4 of metal alloy, and each between drip catcher base plate 8 and drip catcher cover plate 9 and between drip catcher cover plate 9 and drip catcher cover plate 9 protruding, cave in and spatial form that drip catcher cover board grille is formed, make fused mass 3 cool the multiple relatively independent metal burden body of rear formation, subsequent treatment work is greatly simplified.
Reactor core catcher of the present invention is not limited to the embodiment described in embodiment, and those skilled in the art's technical scheme according to the present invention draws and other embodiment belongs to technological innovation scope of the present invention equally.
Claims (9)
1. the layering reactor core fused mass drip catcher forcing to sprawl, comprise the fused mass propagation chamber (7) by transfer of melt passage (6) coupled reaction heap reactor pit (2), it is characterized in that: be provided with the drip catcher base plate (8) that can carry the fused mass that described transfer of melt passage (6) is carried in the inner bottom surface of described fused mass propagation chamber (7), the stacked one group of drip catcher cover plate (9) with drip catcher cover plate through hole (95) being arranged on described drip catcher base plate (8) top, described drip catcher base plate (8), drip catcher cover plate (9) is connected by several cover plate whereabouts directional support (12), the described drip catcher cover plate (9) being positioned at upper strata can cover described drip catcher base plate (8) or be positioned on the described drip catcher cover plate (9) of below.
2. reactor core fused mass drip catcher as claimed in claim 1, is characterized in that:
Described drip catcher base plate (8) periphery sides, along being provided with drip catcher base plate profile convex edge (81), inner panel face is provided with some drip catcher base plate projections (82) and drip catcher base plate depression (83);
The periphery sides of the upper surface of described drip catcher cover plate (9), along being provided with convex edge (91) on drip catcher cover plate profile, upper surface inner panel face is provided with some drip catcher cover plate projections (92) and drip catcher cover plate depression (93); The periphery sides of the lower surface of described drip catcher cover plate (9) is along being provided with convex edge (94) under drip catcher cover plate profile, lower surface inner panel face is provided with some outstanding drip catcher cover board grilles (97) downwards, forms fused mass described in each between drip catcher cover board grille (97) and sprawl chamber (96);
Described fused mass is sprawled chamber (96) and can be held the described drip catcher base plate projection (82) on described drip catcher base plate (8) or be positioned at the drip catcher cover plate projection (92) on the described drip catcher cover plate (9) of below; Described drip catcher base plate depression (83), drip catcher cover plate depression (93) can hold the described drip catcher cover board grille (97) of the described drip catcher cover plate (9) of top;
Under described drip catcher base plate profile convex edge (81), drip catcher cover plate profile, convex edge (94) can compact siro spinning technology, forms a fused mass and sprawl space between described drip catcher cover plate (9), drip catcher base plate (8); Under the described drip catcher cover plate profile of the described drip catcher cover plate (9) on upper strata the described drip catcher cover plate (9) of convex edge (94) and lower floor described drip catcher cover plate profile on convex edge (91) can compact siro spinning technology, form a fused mass between upper and lower two described drip catcher cover plates (9) and sprawl space; Described fused mass sprawls space by described drip catcher cover plate through hole (95) and ft connection;
The coolant channel (19) through with the inner space of described fused mass propagation chamber (7) is also provided with in described drip catcher base plate (8), drip catcher cover plate (9).
3. reactor core fused mass drip catcher as claimed in claim 1, it is characterized in that: described drip catcher cover plate (9) is also provided with some terminal-velocity dampers (15), for controlling the speed that described drip catcher cover plate (9) is fallen along described cover plate whereabouts directional support (12).
4. reactor core fused mass drip catcher as claimed in claim 1, it is characterized in that: described drip catcher base plate (8), drip catcher cover plate (9), cover plate whereabouts directional support (12) all adopt resistant to elevated temperatures metal, alloy, nonmetal or compound substance manufacture, the surface of contact or close fused mass or top layer, all adopt tungsten Penetrator or composite silicon carbide ceramic material.
5. drip catcher as claimed in claim 1, is characterized in that: described drip catcher cover plate (9) is also provided with cover plate release trigger switch (11) controlling described drip catcher cover plate (9) and fall.
6. reactor core fused mass drip catcher as claimed in claim 1, is characterized in that: described fused mass propagation chamber (7) is also provided with fused mass propagation chamber waterflood-transmission line (20) and fused mass propagation chamber vent passages (14).
7. reactor core fused mass drip catcher as claimed in claim 1, it is characterized in that: the reactor pit expendable material (4) being provided with metal alloy in described reactor pit (2), the junction of described transfer of melt passage (6) and described reactor pit (2) is provided with cheats the end and fuses and fill in (5).
8. reactor core fused mass drip catcher as claimed in claim 1, is characterized in that: be also provided with the total quantity sensor of fused mass overcurrent (10), transfer of melt channel temperature sensor (16), transfer of melt passage thermal imaging system (17) in described transfer of melt passage (6); Fused mass propagation chamber thermal imaging system (18) is also provided with in described fused mass propagation chamber (7).
9. the reactor core fused mass drip catcher as described in claim 5,8, it is characterized in that: the burst size of the data-signal that described cover plate release trigger switch (11) can send according to the total quantity sensor of described fused mass overcurrent (10), transfer of melt channel temperature sensor (16), transfer of melt passage thermal imaging system (17) and described drip catcher cover plate (9) is triggered, also can manually or Remote manual activation, described drip catcher cover plate (9) can discharge one by one, divide into groups release, disposable release.
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| CN201510908289.1A CN105551537B (en) | 2015-12-10 | 2015-12-10 | Reactor core melt catcher capable of being forcedly spread in layered mode |
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