WO2022057646A1 - Unité de stockage de combustible usé et dispositif de stockage de combustible usé empilé - Google Patents

Unité de stockage de combustible usé et dispositif de stockage de combustible usé empilé Download PDF

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Publication number
WO2022057646A1
WO2022057646A1 PCT/CN2021/116593 CN2021116593W WO2022057646A1 WO 2022057646 A1 WO2022057646 A1 WO 2022057646A1 CN 2021116593 W CN2021116593 W CN 2021116593W WO 2022057646 A1 WO2022057646 A1 WO 2022057646A1
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WO
WIPO (PCT)
Prior art keywords
spent fuel
fuel storage
storage unit
plate
accommodating cavity
Prior art date
Application number
PCT/CN2021/116593
Other languages
English (en)
Chinese (zh)
Inventor
程呈
潘跃龙
唐邵华
张学岭
Original Assignee
深圳中广核工程设计有限公司
中广核工程有限公司
中国广核集团有限公司
中国广核电力股份有限公司
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Filing date
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Application filed by 深圳中广核工程设计有限公司, 中广核工程有限公司, 中国广核集团有限公司, 中国广核电力股份有限公司 filed Critical 深圳中广核工程设计有限公司
Publication of WO2022057646A1 publication Critical patent/WO2022057646A1/fr

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/02—Details of handling arrangements
    • G21C19/06—Magazines for holding fuel elements or control elements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
    • G21C19/02—Details of handling arrangements
    • G21C19/06—Magazines for holding fuel elements or control elements
    • G21C19/07—Storage racks; Storage pools
    • 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

Definitions

  • the invention relates to the technical field of spent fuel storage, in particular to a spent fuel storage unit and a stacking type spent fuel storage device.
  • Concrete modules for dry storage of spent fuel are used to store and protect fuel storage tanks that are sealed and loaded with spent fuel assemblies.
  • the horizontal concrete storage module unit performs nuclear safety functions during long-term storage, including: providing structural protection and radiation shielding of spent fuel storage tanks, and providing air convection channels to fully cool spent fuel storage tanks.
  • the main defects are: only single-layer storage can be used, the spent fuel storage facilities cover a large area, and the requirements for social and economic development planning, population centers and traffic roads around the site are high. , which seriously affects the adaptability and public acceptability of spent fuel dry storage sites.
  • Chinese patent CN110534218A discloses a horizontal storage module for nuclear power plant spent fuel, which can adopt a double-layer dense storage design, but the storage capacity is only two layers, and the overall storage capacity is still limited.
  • the upper module is affected by the heat transfer of the lower module, and it is difficult for the upper module to store spent fuel assemblies with high fuel consumption and high enrichment level with high heat load level.
  • the technical problem to be solved by the present invention is to provide a spent fuel storage unit capable of realizing multi-layer upper and lower stacking and realizing high thermal load and high-capacity centralized storage, and a stacked spent fuel storage device having the spent fuel storage unit.
  • the technical solution adopted by the present invention to solve the technical problem is to provide a spent fuel storage unit, which includes a storage module and a plurality of corner posts respectively embedded in several corners of the storage module; The accommodating cavity in which the fuel storage tank lies;
  • the storage module has opposite front and back;
  • the plurality of corner posts include a first corner post corresponding to the front side of the storage module and a second corner post corresponding to the back side of the storage module;
  • the first corner post is provided with an air intake hole that communicates with the accommodating cavity
  • the back of the storage module is provided with an emptying hole that communicates with the accommodating cavity, the air intake hole, the accommodating cavity and the emptying hole They are connected in sequence to form a heat dissipation channel for air to pass through and to take out the decay heat of the spent fuel assembly.
  • the air inlet hole is arranged on the lower end of the first side surface of the first corner pillar that is in the same direction as the front side of the storage module, and the lower end of the second side surface of the first corner pillar that is connected to the storage module A through hole is provided, and the through hole communicates with the air inlet hole and the accommodating cavity.
  • the first corner column is a hollow tube structure; the bottom port of the first corner column forms the air inlet hole, and the lower end of the side surface of the first corner column connected to the storage module is provided with a through hole , the through hole communicates with the air inlet hole and the accommodating cavity.
  • each corner post is provided with a groove
  • the bottom of each corner post is provided with a convex post adapted to the groove.
  • the spent fuel storage unit further comprises a support and a roller bracket;
  • the support is arranged on the inner bottom of the storage module, and an air inlet channel that communicates with the air inlet and the accommodating cavity is formed on the support; the roller bracket is arranged on the support , used to support the spent fuel storage tank and allow the spent fuel storage tank to move into and out of the accommodating cavity.
  • the support comprises a middle support plate and two side support plates symmetrically arranged on opposite sides of the middle support plate; the space between each of the side support plates and the middle support plate is formed the air inlet channel;
  • the roller bracket includes a plurality of supporting ribs spaced along the length direction of the support, at least one tray spanning the plurality of the supporting ribs, and a plurality of the supporting ribs are arranged at intervals on the tray Each of the support ribs is supported on the top surfaces of the middle support plate and the side support plate.
  • the support ribs have opposite bottom surfaces and top surfaces; the bottom surfaces of the support ribs abut on the top surfaces of the middle support plate and the side support plates, and the top surfaces of the support ribs
  • the two ends are respectively provided with raised parts, and the two raised parts are provided with oppositely inclined supporting surfaces;
  • the roller bracket includes two trays; the two trays are respectively arranged on the supporting surface.
  • roller circles are divided into three groups of roller circle groups, which are respectively located on the middle section and both ends of the tray;
  • the distance between the roll circles of the roll circle group located on the middle section is larger than the distance between the roll circle groups of the roll circle group located on both ends of the tray.
  • the spent fuel storage unit further includes a plurality of deflectors
  • a plurality of the baffles are arranged in the accommodating cavity and are arranged around the periphery of the spent fuel storage tank at intervals, and a space between the baffle and the spent fuel storage tank is defined in the accommodating cavity.
  • An annular cavity communicated with the air inlet channel.
  • the spent fuel storage unit includes four of the deflectors;
  • the four deflectors are symmetrically distributed around the spent fuel storage tank; the two ends of the deflector located at the upper end of the accommodating cavity are respectively fixed on the inner wall of the storage module and are located at the lower end of the accommodating cavity One end of the deflector is fixed on the inner wall of the storage module, and the other end is fixed on the support.
  • the storage module comprises a bottom plate, a top plate opposite to the bottom plate, two side plates enclosed between and opposite the bottom plate and the top plate, a front plate enclosed between and opposite the bottom plate and the top plate board and backplane;
  • the front plate is provided with a door opening that communicates with the accommodating cavity and a cover plate that can be opened and closed on the door opening;
  • the support is arranged on the inner bottom of the bottom plate, and the lower end of the front plate is provided with an arc-shaped channel communicating with the air inlet and the air inlet channel;
  • the evacuation hole is provided on an end surface of the top plate facing away from the front plate, and an arc-shaped extension extends through the inner surface of the top plate toward the bottom plate.
  • the inner surface of the cover plate and/or the inner surface of the back plate is provided with at least one displacement limiting plate for abutting against the spent fuel storage tank and restricting the spent fuel storage tank from moving in the horizontal direction.
  • the door opening includes a first door opening and a second door opening that are connected in an axial direction, the second door opening is closer to the accommodating cavity than the first door opening, and the inner diameter of the second door opening is smaller than the inner diameter of the first door opening;
  • the cover plate includes an outer cover for covering the outer surface of the front plate, a first boss arranged on the outer cover and matched in the first door hole, and a first boss arranged on the first door hole. A second boss on the boss and matched in the second door hole.
  • the second door opening and/or the second boss is provided with at least one abdication groove for accommodating the end of the roller bracket therein.
  • the outer surface of the side plate is provided with a concave-convex structure for concave-convex matching with the side plate of the other storage module.
  • the present invention also provides a stacking type spent fuel storage device, comprising an exhaust silo and a spent fuel storage unit wall disposed on at least one side of the exhaust silo; the spent fuel storage unit wall includes a plurality of any or more a spent fuel storage unit as described in one;
  • a plurality of the spent fuel storage units are stacked in an M ⁇ N matrix to form the spent fuel storage unit wall; wherein M is the number of spent fuel storage units in the horizontal direction, and N is the number of spent fuel storage units in the vertical direction , M and N are both natural numbers ⁇ 1;
  • the side of the air exhaust silo is provided with an air inlet which is in communication with the emptying hole of the spent fuel storage unit, and the top of the air exhaust silo is provided with an air outlet which is communicated with the air inlet.
  • the air inlet hole of each spent fuel storage unit is arranged on the lower end of the first side surface of the first corner column.
  • M spent fuel storage units located on the same level form a storage unit layer
  • the air inlet holes on the spent fuel storage unit of at least one storage unit layer are arranged on the lower end of the first side face of the first corner post, and the at least one storage unit layer includes a bottommost one of the spent fuel storage unit walls. layer storage unit layer;
  • the air inlet holes on the spent fuel storage units of the other storage unit layers are arranged on the bottom port of the first corner post, and the first corner post communicates with the first corner post on another spent fuel storage unit located below.
  • two adjacent spent fuel storage units in the horizontal direction are fixed in cooperation with the concave-convex structure on the side plate;
  • the protruding column at the bottom of the corner column of the spent fuel storage unit located above is fitted with the groove at the top of the corner column of the spent fuel storage unit located below Inside.
  • the exhaust silo comprises a base, a vertical exhaust gallery arranged on the base, and an exhaust hood arranged on the top of the exhaust gallery;
  • the air inlet is arranged on at least one side of the air exhaust gallery; the air outlet is arranged on the top of the air outlet gallery and below the air outlet hood.
  • the inner channel of the exhaust gallery is an equal-diameter channel or a tapered variable-diameter channel.
  • the stacked spent fuel storage device includes two spent fuel storage unit walls symmetrically arranged on opposite sides of the exhaust silo.
  • the beneficial effects of the present invention are as follows: through the improved design of the spent fuel storage unit, the spent fuel storage unit can be used as the basic unit for stacking and stacking, and at the same time, each storage unit can realize distributed independent air intake and centralized exhaust, and realize multi-layered Stacking combinations and intensive storage of spent fuel with high thermal loads.
  • FIG. 1 is a schematic structural diagram of a stacked spent fuel storage device according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of a longitudinal cross-sectional structure of the stacked spent fuel storage device shown in FIG. 1;
  • Fig. 3 is a partial cross-sectional view of a spent fuel storage unit in the stacked spent fuel storage device shown in Fig. 1;
  • Fig. 4 is the structural representation of the first corner post in Fig. 3;
  • Fig. 5 is a partial cross-sectional view of the spent fuel storage unit (after removing the spent fuel storage tank) in the stacked spent fuel storage device shown in Fig. 1;
  • Fig. 6 is the structural representation of the door opening on the front panel in Fig. 5;
  • Fig. 7 is the structural representation of the cover plate in Fig. 5;
  • Figure 8 is a schematic structural diagram of the side plate and the other side plate in Figure 5 after concave-convex mating;
  • Fig. 9 is the structural representation of the support in Fig. 5;
  • Fig. 10 is the structural representation of the roller bracket in Fig. 5;
  • Fig. 11 is the structural schematic diagram of the support rib in Fig. 10;
  • Fig. 12 is the structural representation of the roller circle in Fig. 10;
  • Fig. 13 is a front sectional view of the spent fuel storage unit in the stacked spent fuel storage device shown in Fig. 1;
  • Fig. 14 is a partial cross-sectional view of the exhaust silo in the stacked spent fuel storage device shown in Fig. 1;
  • FIG. 15 is a schematic structural diagram of a stacked spent fuel storage device according to the second embodiment of the present invention.
  • 16 is a schematic structural diagram of a stacked spent fuel storage device according to a third embodiment of the present invention.
  • FIG. 17 is a schematic structural diagram of another embodiment of the first corner post in FIG. 16 .
  • the stacked spent fuel storage device includes an exhaust silo 1 and spent fuel storage unit walls 2 arranged on opposite sides of the exhaust silo 1 .
  • the spent fuel storage unit wall 2 is formed by stacking several spent fuel storage units 20 in an M ⁇ N matrix. Among them, M is the number of spent fuel storage units 20 in the horizontal direction, N is the number of spent fuel storage units 20 in the vertical direction, and both M and N are natural numbers ⁇ 1.
  • the spent fuel storage unit 20 is used for laying the spent fuel storage tank 3 in which the spent fuel assemblies are placed, as a unit device for storing the spent fuel storage tank 3 .
  • the spent fuel storage unit wall 2 is formed by stacking twenty spent fuel storage units 20 in a 5 ⁇ 4 matrix, with four layers and five columns.
  • the front of the spent fuel storage unit 20 facing away from the exhaust silo 1 forms the front of the spent fuel storage unit wall 2
  • the rear of the plurality of spent fuel storage units 20 facing the exhaust silo 1 forms the back of the spent fuel storage unit wall 2
  • the back of the spent fuel storage unit wall 2 is connected to and communicated with the side of the exhaust silo 1, so that after the outside air enters from the front of the spent fuel storage unit wall 2, it passes through the interior of each spent fuel storage unit 20, with After the decay heat on the surface of the spent fuel storage tank 3 is removed, it enters the exhaust silo 1 from the back of the spent fuel storage unit wall 2, and finally is discharged from the top of the exhaust silo 1, so as to take away the decay heat of the spent fuel assembly, and the air flows toward the exhaust silo 1. As shown by the arrows in Figures 1 and 2.
  • the spent fuel storage unit 20 includes a storage module 21 and a plurality of corner posts respectively embedded in several corners of the storage module 21 .
  • the storage module 21 has a accommodating cavity 210 inside, in which the spent fuel storage tank 3 is placed.
  • the storage module 21 is made of reinforced concrete, steel plate concrete, metal material or other temperature-resistant and high-strength materials, and undertakes the function of shielding and protecting the structure and radiation of the spent fuel storage tank 3 .
  • the corner posts form the main skeleton of the spent fuel storage unit 20 and undertake the structure and shielding protection functions of the spent fuel storage unit 20 .
  • the storage module 21 has opposite fronts and backs, the front corresponds to the front of the spent fuel storage unit 20, and the back corresponds to the back of the spent fuel storage unit 20; the plurality of corner posts include a first corner post 22 corresponding to the front of the storage module 21, corresponding to the storage module 21. 21 The second corner post 23 on the back.
  • the first corner post 22 has a first side surface in the same direction as the front surface, and a second side surface connected with the storage module 21 .
  • the lower end of the first side surface of the first corner post 22 is provided with an air intake hole 24
  • the lower end of the second side surface is provided with a through hole 25
  • the air intake hole 24 communicates with the accommodating cavity 210 through the through hole 25 .
  • the back of the storage module 21 is provided with an emptying hole 26 that communicates with the accommodating cavity 210.
  • the air intake hole 24, the accommodating cavity 210 and the emptying hole 26 are connected in sequence to form a heat dissipation for air to pass through and to extract the decay heat of the spent fuel assembly. aisle.
  • the storage module 21 is preferably a rectangular parallelepiped structure, so it has four corners.
  • the spent fuel storage unit 20 includes four corner columns, and the four corner columns respectively include two first corner columns 22 and two second corner columns 23 .
  • each edge of the storage module 21 is provided with a gap, and the gap is adapted to the corner post, so that after the corner post is embedded in the gap, the gap is filled and stored together.
  • the modules 21 form the spent fuel storage unit 20 of an integral cuboid structure.
  • each corner column (including the first corner column 22 and the second corner column 23) is provided with a groove 27, and the bottom of each corner column is provided with a convex column 28 that matches the groove 27, so that the wall of the spent fuel storage unit is 2, the spent fuel storage unit 20 located at the lowermost layer can be fitted into the positioning groove of the foundation through the protruding columns 28 of its corner posts, so as to undertake the structural seismic function of the entire spent fuel storage unit wall 2; the spent fuel storage unit located on the upper layer
  • the unit 20 can be fitted into the groove 27 of the corner post of the lower spent fuel storage unit 20 through the protruding posts 28 of its corner posts to achieve relative fixation of the upper and lower spent fuel storage units 20 and prevent dislocation and falling under earthquake conditions.
  • the corner columns (including the first corner column 22 and the second corner column 23 ) can be made of hollow steel pipes, and the middle area is filled with concrete or other heat-resistant filling materials to achieve solid, and the upper and lower ends of the corner columns retain hollow structures, which is convenient for setting concave Slots 27, air inlet holes 24 and through holes 25, etc.
  • the first corner posts 22 and the second corner posts 23 are both made of square steel pipes, and each of the first corner posts 22 and each of the second corner posts 23 has two adjacent corner posts.
  • Each side is opposite to the storage module 21 .
  • the first side with the air intake holes 24 and the front side of the storage module 21 face and align with each other, and the second side with the through holes 25 is adjacent to and relatively perpendicular to the first side.
  • first corner posts 22 and the second corner posts 23 can also be made of other polygonal steel pipes, such as triangles, hexagons and the like.
  • the storage module 21 includes a bottom plate 211 , a top plate 212 opposite to the bottom plate 211 , two side plates 213 enclosed between the bottom plate 211 and the top plate 212 and facing each other, and surrounded by the bottom plate 211 and the top plate 212
  • the front plate 214 and the back plate 215 are opposite to each other; the accommodating cavity 210 is formed in the space enclosed by the bottom plate 211 , the top plate 212 , the side plate 213 , the front plate 214 and the back plate 215 .
  • the bottom plate 211 , the top plate 212 , the side plate 213 , the front plate 214 , the back plate 215 and the corner posts are fixedly connected through L-shaped angle steel and bolts.
  • the bottom plate 211 , the side plates 213 , the front plate 214 and the back plate 215 can be made of metal materials such as steel plates, or reinforced concrete structural materials, or steel plate concrete, respectively.
  • the lower end of the front plate 214 is provided with an arc-shaped channel 2140 , which communicates with the air inlet hole 24 on the first corner post 22 and the accommodating cavity 210 .
  • the lower end of the front plate 214 is provided with two arc-shaped channels 2140 which are respectively connected to the through holes 25 on the two first corner posts 22 , and the other ends of the arc-shaped channels 2140 are connected to the accommodating cavity. 210 is connected.
  • the air inlet hole 24 on each first corner post 22 is communicated with the arcuate channel 2140 through the through hole 25 , so that the air inlet hole 24 , the through hole 25 , the arcuate channel 2140 and the accommodating cavity 210 are communicated in sequence.
  • the arc-shaped passage 2140 can be a 90° arc-shaped ventilation corridor, and its cross section is a circle or a polygon.
  • the front plate 214 is provided with a door opening 216 and a cover plate 217 .
  • the door hole 216 communicates with the accommodating cavity 210, and allows the spent fuel storage tank 3 to pass in and out of the accommodating cavity 210; the cover plate 217 can be opened and closed on the door hole 216 to seal it.
  • the door opening 216 may further include a first door opening 2161 and a second door opening 2162 that are connected to each other in the axial direction. It is located on the side of the second door hole 2162 facing away from the accommodating cavity 210 ; and the inner diameter of the second door hole 2162 is smaller than the inner diameter of the first door hole 2161 .
  • the cover plate 217 includes an outer cover 2173 , a first boss 2171 provided on the outer cover 2173 , and a second boss 2172 provided on the first boss 2171 ; the outer cover 2173 is used to cover the front plate 214 On the outer surface, the first boss 2171 is fitted in the first door hole 2161 , and the second boss 2172 is fitted in the second door hole 2162 .
  • the outer cover 2173 is a polygonal cover.
  • the outer cover 2173 is closed on the circular door opening 216, and is attached to the outer surface of the front panel 214 through the outer peripheral edge, and is fixedly connected by bolts or the like.
  • the inner surface of the cover plate 217 facing the accommodating cavity 210 may also be provided with at least one displacement limiting plate for abutting the spent fuel storage tank 3 to limit the spent fuel storage tank 3 from moving in the horizontal direction (especially during earthquake accidents. case).
  • the inner surface of the back plate 215 of the storage module 21 facing the accommodating cavity 210 may also be provided with at least one displacement limiting plate 218 .
  • the displacement limiting plate 218 can be made of H-shaped steel.
  • the outer surface of the side plate 213 of the storage module 21 is provided with a concave-convex structure 2130 , which can cooperate with the concave-convex structure 2130 on the side plate 213 of another adjacent storage module 21 to achieve occlusal complementarity.
  • the two adjacent spent fuel storage units 20 are engaged and fixed by the concave-convex structure 2130 on the side plate 213, as shown in FIG. 8 .
  • the overall structural stability of the spent fuel storage unit wall 2 is enhanced to prevent the spent fuel storage unit 20 from vibrating and tipping over under earthquake conditions.
  • the concave-convex structure 2130 may be corrugated and the like, and the corrugated shape of the corrugation may be trapezoidal, triangular, rectangular, or the like.
  • the inner surface of the side plate 213 facing the accommodating cavity 210 may also be provided with a concave-convex structure.
  • the exhaust hole 26 is arranged on the end face of the top plate 212 facing away from the front plate 214, and the arc extends through the inner surface of the top plate 212 toward the bottom plate 211, and is an arc-shaped exhaust channel as a whole, so that the exhaust channels along the spent fuel storage tank can be exhausted. 3.
  • the air flowing upward and collected to the lower side of the top plate 212 is all introduced into the rear end area of the accommodating cavity 210 and then discharged to the outside of the storage module 21.
  • the top plate 212 includes a main body layer 2121 and an insulating layer 2122 disposed on the main body layer 2121 . top.
  • the thermal insulation layer 2122 is made of thermal insulation and heat resistant material.
  • the decay heat of the spent fuel storage unit 20 at the lower layer will be transferred to the bottom plate 211 of the spent fuel storage unit 20 at the upper layer through the top plate 212 , increasing the cooling load of the spent fuel storage unit 20 at the upper layer. ;
  • the heat load of the spent fuel assemblies that can be stored in the spent fuel storage unit 20 on the upper layer decreases accordingly, which directly affects the spent fuel loading capacity and product adaptability of the entire spent fuel storage unit wall 2 .
  • the decay heat of the lower spent fuel storage unit 20 can be prevented from being transferred to the upper spent fuel storage unit 20 through the top plate 212 as much as possible, so that each spent fuel storage unit 20 can have a relatively balanced and relatively high heat load level of spent fuel storage capacity.
  • the spent fuel storage unit 20 further includes a support 30 and a roller bracket 40 arranged at the inner bottom of the storage module 21 .
  • the support 30 is specifically disposed on the bottom plate 211 of the storage module 21 , and an air intake channel 300 is formed on the support 30 to communicate with the air inlet hole and the accommodating cavity 210 .
  • the roller bracket 40 is disposed on the support 30 for supporting the spent fuel storage tank 3 and for the spent fuel storage tank 3 to move into and out of the accommodating cavity 210 thereon.
  • the support 30 may include a middle support plate 31, two side support plates 32 symmetrically arranged on opposite sides of the middle support plate 31; between each side support plate 32 and the middle support plate 31 The interval of the air inlet channel 300 is formed.
  • Each air inlet channel 300 communicates with the accommodating cavity 210 through an open top, each air inlet channel 300 communicates with the arcuate channel 2140 through an open end, and communicates with the air inlet on the first corner post 22 through the arcuate channel 2140.
  • the air holes 24 communicate with each other, and introduce external air into the accommodating cavity 210 .
  • the side support plate 32 can be an upright single plate as shown in FIG. 9
  • the middle support plate 31 can be an inverted U-shaped plate as shown in FIG. 9 .
  • the length directions of the side plate support plate 32 and the middle support plate 31 are both consistent with the length direction of the bottom plate 211 .
  • the roller bracket 40 includes a plurality of supporting ribs 41 spaced along the length direction of the support 30, at least one tray 42 spanning the plurality of supporting ribs 41, and a plurality of spaced rows Roller circle 43 laid on tray 42.
  • Each supporting rib 41 is supported on the top surface of the middle supporting plate 31 and the side supporting plate 32, and the tray 42 is placed parallel to the middle supporting plate 31 and the side supporting plate 32 across all the supporting ribs 41 to stably support the entire supporting rib 41.
  • Spent fuel storage tank 3 weight weight.
  • the roll bracket 40 includes two trays 42 , and each tray 42 is provided with several roll circles 43 .
  • the supporting ribs 41 have opposite bottom surfaces and top surfaces; the bottom surfaces of the supporting ribs 41 abut on the top surfaces of the middle supporting plate 31 and the side supporting plates 32 .
  • two ends of the top surface of the support rib 41 are respectively provided with protruding portions 411 , and two protruding portions 411 are provided with oppositely inclined supporting surfaces 412 .
  • the normal of the support surface 412 coincides with the center of the spent fuel storage tank 3 .
  • the two trays 42 are respectively disposed on the two supporting surfaces 412 .
  • the supporting rib 41 is a special-shaped U-shaped supporting plate with mirror symmetry as a whole through the arrangement of the upper protrusion 411 and the supporting surface 412 .
  • the support ribs 41 are further made of steel plates.
  • the plurality of roller circles 43 may be arranged on the tray 42 at equidistant intervals, or may be arranged at non-equidistant intervals.
  • the spent fuel storage tank 3 When the spent fuel storage tank 3 is seated on the roller circle 43, the spent fuel storage tank 3 can be pushed into the storage module 21 quickly and easily by applying a small external thrust in the manner of wheel axle rolling, and at the same time, the spent fuel storage module 21 is avoided as much as possible.
  • the surface material of the storage tank 3 causes wear and tear, which affects the service life and structural strength of the spent fuel storage tank 3 .
  • roller circles 43 on each tray 42 are divided into three groups of roller circles, which are located on the middle section and both ends of the tray 42 respectively.
  • the distance between the roller circles 43 of the roller circle group located on the middle section is greater than the distance between the roller circles 43 of the roller circle group located at both ends of the tray 42, so that the arrangement density of the roller circles 43 on the tray 42 forms the intermediate sparseness. , The dense arrangement at both ends.
  • roller circles 43 on both ends of the tray 42 also undertake the load bearing and sliding transportation functions of the spent fuel storage tank 3, and the roller circles 43 on the middle section mainly undertake the sliding transportation function.
  • the roller circles 43 on the middle section mainly undertake the sliding transportation function.
  • the number of roll circles is set to be large, the possibility of equipment failure and aging failure is higher, and low-density arrangement is adopted in the middle to reduce the number of roll circles 43, which helps to avoid affecting the subsequent impact on spent fuel storage tanks 3 Retrieve convenience operations.
  • the roller circle 43 includes a roller bar 431 and a roller shaft 432 passing through the axis of the roller bar 431 . Both ends of the roller shaft 432 protrude from the opposite ends of the roller bar 431 and are used to be fixed on the opposite sides of the tray 42; the annular groove (not shown) between the roller bar 431 and the roller shaft 432 is provided with rolling steel columns (not shown), the roller bar 431 can freely rotate around the roller shaft 432, so that the spent fuel storage tank 3 supported thereon can move lightly and quickly in the horizontal direction.
  • the outer surface of the roller bar 431 is arc-shaped. .
  • the radius of the arc of the outer surface of the roller bar 431 is the same as the radius of the spent fuel storage tank 3 .
  • the roller bar 431 is preferably made of a nickel-based temperature-resistant and corrosion-resistant stainless steel alloy material.
  • At least one escape groove 400 is provided on the second door opening 2162 and/or the second boss 2172 , as shown in FIGS. 6 and 7 .
  • the leaving groove 400 is used for accommodating the end of the roller bracket 40 therein, so as to avoid structural interference with the roller bracket 40 .
  • the spent fuel storage unit 20 further includes a plurality of deflectors 50 .
  • a plurality of deflectors 50 are arranged in the accommodating cavity 210 and are arranged around the periphery of the spent fuel storage tank 3 at intervals.
  • the annular cavity 500 communicated with the air inlet channel 300 .
  • the spent fuel storage unit 20 includes four deflectors 50 symmetrically distributed around the spent fuel storage tank 3 .
  • the four baffles 50 are evenly distributed around the spent fuel storage tank 3 concentrically at 45°, 135°, 225° and 315°, and each baffle 50 is perpendicular to the line passing through the above corresponding angles.
  • two guide plates 50 are located on both sides of the upper end of the accommodating cavity 210
  • the other two guide plates 50 are located on both sides of the lower end of the accommodating cavity 210 .
  • the deflector 50 at the upper end of the accommodating cavity 210 is an outwardly expanded U-shaped steel plate, and the two ends are respectively fixed on the inner wall of the storage module 21 (the inner surfaces of the top plate 212 and the side plate 213 ).
  • the deflector 50 at the lower end of the accommodating cavity 210 is an elbow-shaped steel plate, one end of which is fixed on the inner wall of the storage module 21 (the inner surface of the side plate 213 ), and the other end is fixed on the support 30 .
  • the deflectors 50 are arranged in different forms at different positions, so that the air surrounds the spent fuel storage tank 3 as much as possible, and convectively cools the outer surface of the storage tank, so as to avoid the formation of weak convection areas in the accommodating cavity 210 of the entire storage module 21, thereby causing local The hot spot affects the thermal safety of the storage module 21 .
  • two opposite sides of the exhaust silo 1 are respectively provided with air inlets 101, and the air inlets 101 are communicated with the internal passage of the exhaust silo 1;
  • There is an air outlet 102 is an air outlet 102 , and the air outlet 102 communicates with the inner channel of the air outlet silo 1 .
  • each air inlet 101 is relatively communicated with the emptying holes 26 on the corresponding spent fuel storage unit 20, so that the decayed air discharged from the spent fuel storage unit 20 decays.
  • the heat is collected into the exhaust silo 1 through the air inlet 101 , and then discharged into the outside air from the exhaust port 102 at the top of the exhaust silo 1 .
  • the exhaust silo 1 may include a base 11 , a vertical exhaust gallery 12 arranged on the base 11 , and an exhaust hood 13 arranged on the top of the exhaust gallery 12 .
  • the base 11, as the supporting bottom of the entire exhaust silo 1, can be composed of a plurality of supporting feet and other structures.
  • the air inlet 101 is arranged on the side of the air exhaust gallery 12
  • the air outlet 102 is arranged on the top of the air outlet gallery 12 and below the air exhaust hood 13 .
  • the air inlet 101 on the air exhaust gallery 12 may be in direct contact and communication with the emptying hole 26 of the spent fuel storage unit 20, or may be connected through a pipeline.
  • the inner channel of the exhaust gallery 12 is a vertical air channel, which can be an equal-diameter channel from bottom to top, or a tapered variable-diameter channel, so that under the same flow rate, the upper ventilation flow rate gradually increases, which is more conducive to the removal of spent fuel. Component decay heat is exhausted to the atmosphere.
  • the exhaust hood 13 is a cuboid shielding structure with a hollow bottom, and is placed on the top of the exhaust corridor 12 to undertake the structural protection function to prevent external foreign matter from entering the exhaust corridor 12 and causing blockage.
  • the exhaust silo 1 can be an integral structure, the length and height of which correspond to the length and height of the spent fuel storage unit wall 2, and each side has a plurality of air inlets 101 arranged in a matrix corresponding to the spent fuel storage respectively Evacuation holes 26 of each spent fuel storage unit 20 on the unit wall 2 .
  • the exhaust silo 1 is formed by a plurality of exhaust silo units side by side, each exhaust unit corresponds to a row of spent fuel storage units 20, and each exhaust unit is composed of a base, an exhaust gallery, an exhaust hood, etc. , the structure can refer to Figure 14.
  • the ventilation mode of the stacked spent fuel storage device of the first embodiment is a distributed air intake type, and the details are as follows: the outside air enters the first floor of each spent fuel storage unit 20 on each floor from the front of the spent fuel storage unit wall 2 A corner post 22 enters the accommodating cavity 210 through the through hole 25 and the arc-shaped channel 214 after entering the air inlet hole 24 at the lower end of the first corner post 22 .
  • the bottom of the accommodating cavity 210 flows upward along the air inlet channel 300 on the support 30 into the annular cavity 500 , and flows along the outer peripheral surface of the spent fuel storage tank 3 to cool the spent fuel storage tank 3 .
  • the air After the air is heated by the decay heat of the spent fuel assembly, it flows upward to the upper area of the spent fuel storage tank 3 and then flows to the tail, and is discharged from the exhaust hole 26 at the upper end of the back of the spent fuel storage unit 20, and then enters the exhaust silo through the air inlet 101. 1.
  • the hot air exhausted from all spent fuel storage units 20 is collected into the exhaust silo 1, flows upward in the exhaust silo 1, and is finally exhausted to the outside air through the exhaust port 102 at the top.
  • the stack-type spent fuel storage device includes an exhaust silo 1 and a spent fuel storage unit wall 2 arranged on one side of the exhaust silo 1 .
  • the arrangement of the single spent fuel storage unit wall 2 and the exhaust silo 1 in this embodiment form a single-side stacking storage device.
  • the air inlet only needs to be arranged on the side surface of the exhaust silo 1 corresponding to the spent fuel storage unit wall 2 .
  • the ventilation mode of the stack-type spent fuel storage device of the second embodiment is the same as that of the above-mentioned first embodiment.
  • the stacked spent fuel storage device includes an exhaust silo 1 and a spent fuel storage unit wall 2 arranged on at least one side of the exhaust silo 1 .
  • the spent fuel storage unit wall 2 is formed by stacking several spent fuel storage units 20 in an M ⁇ N matrix. Among them, M is the number of spent fuel storage units 20 in the horizontal direction, N is the number of spent fuel storage units 20 in the vertical direction, and both M and N are natural numbers ⁇ 1.
  • the spent fuel storage unit 20 is used for laying the spent fuel storage tank 3 in which the spent fuel assemblies are placed, as a unit device for storing the spent fuel storage tank 3 .
  • the front of the spent fuel storage unit 20 facing away from the exhaust silo 1 forms the front of the spent fuel storage unit wall 2
  • the rear of the plurality of spent fuel storage units 20 facing the exhaust silo 1 forms the back of the spent fuel storage unit wall 2
  • the back of the spent fuel storage unit wall 2 is connected to and communicated with the side of the exhaust silo 1, so that after the outside air enters from the front of the spent fuel storage unit wall 2, it passes through the interior of each spent fuel storage unit 20, with After the decay heat on the surface of the spent fuel storage tank 3 is removed, it enters the exhaust silo 1 from the back of the spent fuel storage unit wall 2, and finally is discharged from the top of the exhaust silo 1, so as to take away the decay heat of the spent fuel assembly, and the air flows toward the exhaust silo 1.
  • M spent fuel storage units 20 located on the same level form a storage unit layer.
  • the air inlet hole 24 on the spent fuel storage unit 20 of at least one storage unit layer is arranged on the lower end of the first side face of the first corner post 22, and the at least one storage unit layer includes the lowest part located in the spent fuel storage unit wall 2.
  • the air inlet 24 on the spent fuel storage unit 20 of other storage unit layers is arranged on the bottom port of the first corner column 22, and the first corner column 22 is connected to another spent fuel storage unit located below.
  • the first corner posts 22 on the 20 communicate with each other.
  • the spent fuel storage unit wall 2 is formed by stacking twenty spent fuel storage units 20 in a 5 ⁇ 4 matrix, with four layers and five columns.
  • the spent fuel storage unit 20 shown in FIGS. 2 to 13 which will not be repeated here.
  • the air inlet hole 24 on the spent fuel storage unit 20 is arranged on the lower end of the first side surface of the first corner post 22, so that the air inlet hole 24 is also located in the spent fuel storage unit 20.
  • the air inlet holes 24 on the spent fuel storage units 20 of the second and above storage unit layers are arranged on the bottom ports of the first corner posts 22 and pass through the through holes 25 on the sides of the first corner posts 22 . It communicates with the accommodating cavity 210 in the spent fuel storage unit 20 .
  • the air inlet hole 24 is arranged at the bottom port of the first corner column 22, so that the air inlet hole 24 is also located at the bottom of the spent fuel storage unit 20 where it is located, and is connected to the first corner column 22 on another spent fuel storage unit 20 located below Pass.
  • the first corner column 22 of the spent fuel storage unit 20 on the second layer and the storage unit layer above it is a hollow tube structure, and both the top port and the bottom port are open, so that the outside air can enter the lowermost one.
  • a part of the horizontal flow enters the accommodating cavity 210 of the spent fuel storage unit 20 where the first corner column 22 is located, and the other part flows upward into the spent fuel storage unit on the upper layer. 20.
  • the ventilation mode of the stack-type spent fuel storage device of the third embodiment is the low-level centralized air intake type, and the details are as follows: the external air enters each spent fuel storage unit 20 on the lowermost layer from the front of the spent fuel storage unit wall 2
  • the first corner post 22, a part of it enters into it from the air inlet hole 24 at the lower end of the first corner post 22 and then enters the accommodating cavity 210 through the through hole 25 and the arc-shaped channel 214, and the other part continues upward along the first corner post 22 that communicates up and down. flow into the spent fuel storage unit 20 of the second layer and each layer above, respectively.
  • each spent fuel storage unit 20 the external air flows upward along the air inlet channel 300 on the support 30 at the bottom of the accommodating cavity 210 and enters the annular cavity 500 , and flows along the outer peripheral surface of the spent fuel storage tank 3 for the spent fuel Tank 3 is cooled. After the air is heated by the decay heat of the spent fuel assembly, it flows upward to the upper area of the spent fuel storage tank 3 and then flows to the tail, and is discharged from the exhaust hole 26 at the upper end of the back of the spent fuel storage unit 20, and then enters the exhaust silo through the air inlet 101. 1. The hot air exhausted from all spent fuel storage units 20 is collected into the exhaust silo 1, flows upward in the exhaust silo 1, and is finally exhausted to the outside air through the exhaust port 102 at the top.
  • the storage unit layer where the air inlet holes 24 are located on the lower end of the front of the spent fuel storage unit 20 is taken as the front air inlet layer
  • the storage unit layer where the air inlet holes 24 are located at the bottom of the spent fuel storage unit 20 is taken as the bottom air inlet layer.
  • the bottom layer is the front air intake layer
  • all the above layers are the bottom air intake layer.
  • all the storage unit layers of the spent fuel storage unit wall 2 may be formed by alternately stacking front air intake layers and bottom air intake layers, for example, except that the lowermost layer is the front air intake layer, the upper air intake layers
  • the third layer, fifth layer, etc. can also be front air inlet layers.
  • the bottom air inlet layers are stacked between the front air inlet layers, and each bottom air inlet layer is connected to the front air inlet layer below through the first corner column. to realize the circulation of outside air.

Abstract

L'invention concerne une unité de stockage de combustible usé (200) et un dispositif de stockage de combustible usé empilé, l'unité de stockage de combustible usé (20) comprenant un module de stockage (21), et une pluralité de montants d'angle incorporés dans une pluralité de bords du module de stockage (21) respectivement. Une cavité de réception (210) est formée à l'intérieur du module de stockage (21) ; le module de stockage (21) est pourvu d'une surface avant et d'une surface arrière qui se font face. La pluralité de montants d'angle comprend un premier montant d'angle (22) correspondant à la surface avant du module de stockage (21) et un second montant d'angle (23) correspondant à la surface arrière du module de stockage (21). Le premier montant d'angle (22) est pourvu d'un trou d'admission d'air (24) en communication avec la cavité de réception (210), et la surface arrière du module de stockage (21) est pourvue d'un trou de sortie d'air (26) en communication avec la cavité de réception (210). Le trou d'admission d'air (24), la cavité de réception (210) et le trou de sortie d'air (26) sont reliés successivement pour former un canal de dissipation de chaleur qui permet à l'air de passer à travers et d'évacuer la chaleur de décroissance d'un ensemble combustible. Grâce à la conception améliorée de l'unité de stockage de combustible usé (20), l'agencement d'empilement avec l'unité de stockage de combustible usé (20) comme unité de base est rendu possible, et en même temps, chaque unité de stockage (20) peut permettre une admission d'air distribuée et indépendante et un échappement centralisé, ce qui permet d'obtenir des ensembles empilés à plusieurs niveaux et un stockage dense de combustible usé ayant une charge thermique élevée.
PCT/CN2021/116593 2021-04-19 2021-09-06 Unité de stockage de combustible usé et dispositif de stockage de combustible usé empilé WO2022057646A1 (fr)

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CN113130105B (zh) * 2021-04-19 2024-02-20 深圳中广核工程设计有限公司 乏燃料贮存单元及堆码式乏燃料贮存装置

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US20050220256A1 (en) * 2004-03-18 2005-10-06 Singh Krishna P Systems and methods for storing spent nuclear fuel having a low heat load
CN202178067U (zh) * 2011-07-29 2012-03-28 上海核工程研究设计院 改进型重水堆乏燃料干式贮存模块
CN104089498A (zh) * 2014-07-31 2014-10-08 杭州沈氏节能科技股份有限公司 一种新型微通道换热器
CN109300567A (zh) * 2018-10-25 2019-02-01 江苏核电有限公司 一种高密度卧式乏燃料组件干法贮存混凝土模块
CN110534218A (zh) * 2019-09-12 2019-12-03 中广核工程有限公司 核电厂乏燃料卧式贮存模组
CN112466493A (zh) * 2020-11-25 2021-03-09 中广核工程有限公司 核电厂乏燃料卧式贮存模组
CN113130105A (zh) * 2021-04-19 2021-07-16 深圳中广核工程设计有限公司 乏燃料贮存单元及堆码式乏燃料贮存装置

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Publication number Priority date Publication date Assignee Title
US20050220256A1 (en) * 2004-03-18 2005-10-06 Singh Krishna P Systems and methods for storing spent nuclear fuel having a low heat load
CN202178067U (zh) * 2011-07-29 2012-03-28 上海核工程研究设计院 改进型重水堆乏燃料干式贮存模块
CN104089498A (zh) * 2014-07-31 2014-10-08 杭州沈氏节能科技股份有限公司 一种新型微通道换热器
CN109300567A (zh) * 2018-10-25 2019-02-01 江苏核电有限公司 一种高密度卧式乏燃料组件干法贮存混凝土模块
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CN112466493A (zh) * 2020-11-25 2021-03-09 中广核工程有限公司 核电厂乏燃料卧式贮存模组
CN113130105A (zh) * 2021-04-19 2021-07-16 深圳中广核工程设计有限公司 乏燃料贮存单元及堆码式乏燃料贮存装置

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