CN116759128A - Concrete steel plate structure module for dry storage of spent fuel with high burnup - Google Patents

Concrete steel plate structure module for dry storage of spent fuel with high burnup Download PDF

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Publication number
CN116759128A
CN116759128A CN202310724798.3A CN202310724798A CN116759128A CN 116759128 A CN116759128 A CN 116759128A CN 202310724798 A CN202310724798 A CN 202310724798A CN 116759128 A CN116759128 A CN 116759128A
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CN
China
Prior art keywords
shell
base
plate
spent fuel
top cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310724798.3A
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Chinese (zh)
Inventor
陈祖盼
翁晨阳
蒋兴
王梦琪
颜彦
袁芳
贾保军
朱健尧
廖家麒
邵长磊
张振雨
刘永骏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Original Assignee
Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Nuclear Engineering Research and Design Institute Co Ltd filed Critical Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority to CN202310724798.3A priority Critical patent/CN116759128A/en
Publication of CN116759128A publication Critical patent/CN116759128A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/005—Containers for solid radioactive wastes, e.g. for ultimate disposal
    • G21F5/008—Containers for fuel elements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/08—Shock-absorbers, e.g. impact buffers for containers
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/10—Heat-removal systems, e.g. using circulating fluid or cooling fins
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/06—Details of, or accessories to, the containers
    • G21F5/12—Closures for containers; Sealing arrangements
    • 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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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention relates to the technical field of dry storage of spent fuel in a nuclear power plant, in particular to a concrete steel plate structure module for dry storage of spent fuel with high burnup, which comprises a top cover, a cylinder body and a base, wherein a cylinder body shell is an outer shell and an inner shell which are concentrically arranged, an annular cavity is formed in the inner shell, a stepped structure is formed at the top part of the inner shell, the bottom of the shell is connected with a bottom plate, the base can be in sliding fit with the annular cavity and clamped on the bottom plate, and the top cover is connected with the top of the cylinder body and is matched with the stepped structure; the bottom of the shell is transversely provided with an air inlet channel, the top of the shell is transversely provided with an air outlet channel, the air inlet channel and the air outlet channel are communicated with the annular cavity, a set gap is reserved between the base and the inner shell and between the top cover and the step structure, and the air inlet channel and the top surface of the base and the air outlet channel and the bottom surface of the top cover are staggered; the top cover, the barrel and the base are internally provided with reinforcing parts; the novel lifting device is high in structural strength, low in construction difficulty, strong in foreign matter prevention capability, good in shielding performance, strong in waste heat discharge capability, high in lifting convenience and complete in installation and use interfaces.

Description

Concrete steel plate structure module for dry storage of spent fuel with high burnup
Technical Field
The invention relates to the technical field of dry storage of spent fuel in a nuclear power plant, in particular to a concrete steel plate structural module for dry storage of spent fuel with high burnup.
Background
The conventional design life of the pressurized water reactor nuclear power plant is 40-60 years, the capacity of the spent fuel pool is limited, and the spent fuel pool can generally meet the storage requirement of the spent fuel pool within more than 10 years, so that the problem related to the full capacity of the spent fuel pool can be necessarily caused in the service life of the nuclear power plant, and a plurality of spent fuel off-stack dry storage facilities can be formed. The dry spent fuel storage facility has the functions of storing a sealed container with a spent fuel assembly, performing structural protection and radiation shielding on the sealed container, and discharging waste heat through convection so as to keep the temperature of the spent fuel below a safety limit value.
Patent CN103065696B discloses a spent fuel dry storage device comprising a spent fuel storage, a support and an external module. The external module is a concrete module, but the outside is not wrapped and is directly exposed in the atmosphere. In the long-term storage process, the surface of the concrete is extremely easy to be damaged locally, fall off and the like, and the storage safety of spent fuel is affected.
Patent CN105155898B discloses a concrete silo for dry storage of spent fuel, which comprises a top cover, an annular silo and a base, and comprises a steel shell and concrete filled in the shell. However, the steel shell lacks a reinforcing part, the structural module has weak structural strength and weak capability of resisting earthquakes, wind, tornadoes, flying objects and the like; the base of the silo is fixed with the annular silo bottom plate, which is not beneficial to concrete pouring and filling; the Z shape of the silo ventilation opening influences air convection and waste heat discharge; the silo is not provided with measures for rainwater and living matters to enter the silo, so that the storage safety of spent fuel is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a concrete steel plate structural module for dry storage of high-burnup spent fuel, which has the advantages of high structural strength, low construction difficulty, strong foreign matter prevention capability, good shielding performance, strong residual heat discharge capability, high hoisting convenience and complete installation and use interface.
In order to achieve the above object, the present invention is realized by the following technical scheme:
the utility model provides a concrete steel sheet structure module for high burnup spent fuel dry-type stores, includes top cap, barrel and base, and the barrel casing is shell and the inner shell that sets up concentrically, and the inside annular cavity that forms of inner shell, and top department forms the ladder structure, and the bottom connection bottom plate of casing, top connection roof, but the base with annular cavity sliding fit and joint on the bottom plate, top cap and barrel top are connected and with ladder structure cooperation;
the bottom of the shell is transversely provided with an air inlet channel, the top of the shell is transversely provided with an air outlet channel, the air inlet channel and the air outlet channel are communicated with the annular cavity, a set gap is reserved between the base and the inner shell and between the top cover and the step structure, and the air inlet channel and the top surface of the base and the air outlet channel and the bottom surface of the top cover are staggered to form an L-shaped labyrinth air outlet channel; the top cover, the cylinder body and the base are internally provided with reinforcing parts and concrete is poured.
As a further implementation manner, the inner shell comprises an upper shell and a lower shell, wherein the diameter of the upper shell is larger than that of the lower shell, and the upper shell and the lower shell are connected through a transversely arranged annular plate to form a step structure.
As a further implementation mode, limiting buffer section steel is arranged on the inner side face of the inner shell in a circumferential direction, and the limiting buffer section steel is arranged vertically.
As a further implementation mode, the annular cavity on the bottom plate is provided with a guide pin which is used for being matched with the base, and the bottom plate is also provided with a water flow hole and a water drainage groove.
As a further implementation mode, a hanging plate is connected between the outer shell and the inner shell and close to the top, a connecting part for hanging is arranged on the hanging plate, the top plate is arranged at the top of the hanging plate, and a pouring collar plate is arranged between the inner side surface of the top of the outer shell and the outer side surface of the top of the inner shell.
As a further implementation manner, the air inlet channel and the air outlet channel are arranged in a straight shape, a grid is arranged inside the air inlet channel and the air outlet channel, and the air inlet channel and the air outlet channel extend outside the shell and are provided with the metal mesh plate.
As a further implementation mode, the top cover comprises a shell, a top plate is arranged at the top of the shell, a bottom plate is arranged at the bottom of the shell, the reinforcing piece is arranged inside the shell, the outer side surface of the shell is also of a step structure, the step structure is matched with the inner shell, and a hoisting structure is arranged at the top of the shell.
As a further implementation mode, the base also comprises a shell, the reinforcing piece is welded inside the shell, a guide sleeve is arranged at the bottom of the base and used for being clamped with a guide pin on a bottom plate of the cylinder body, the outer diameter of the base is smaller than the inner diameter of the inner shell, and a hook-shaped lifting lug is arranged at the top of the base.
As a further implementation, a rain cover is also included, for mounting on top of the top cover.
As a further implementation, the reinforcement is a peg and a tie.
The beneficial effects of the invention are as follows:
1. the top cover is connected with the top of the cylinder and matched with the ladder structure, so that the radiation shielding effect of the top of the concrete steel plate structure module is effectively improved; set gaps are arranged between the base and the inner shell and between the top cover and the step structure, and the air inlet channel is staggered with the top surface of the base and the bottom surface of the top cover so as to form an L-shaped labyrinth air outlet channel, so that the radiation shielding effect of the air inlet channel and the air outlet channel is effectively improved on the basis of realizing passive waste heat discharge.
2. According to the invention, the grids are arranged in the exhaust channel and the air inlet channel, so that the radiation shielding effect of the exhaust channel and the air inlet channel is further improved. The exhaust channel and the air inlet channel are in a straight shape, so that the air flow resistance is effectively reduced, and the waste heat discharging capability is improved.
3. The cylinder, the top cover and the base are internally provided with the reinforcing piece, the reinforcing piece is matched with concrete, the structural strength is high, and natural disasters such as earthquake, wind, tornado, flying objects and the like can be resisted; the reinforcing piece improves the structural strength and the integral heat conducting performance of the module.
4. The limiting buffer section steel limits the spent fuel sealed container stored in the concrete steel plate structural module and relieves the impact load of the spent fuel sealed container when the concrete steel plate structural module is overturned.
5. The cylinder, the top cover and the base are all independent components, the independent construction is carried out, the independent concrete pouring is carried out, and finally the assembly is carried out, so that the construction difficulty is low, and the installation is convenient; and the setting of the pouring opening inner ring plate and the pouring opening outer ring plate reduces the thermal influence on regional concrete when the cylinder top plate is welded with the cylinder inner shell and the cylinder outer shell.
6. The bottom plate of the cylinder body is provided with the water flowing holes and the water draining grooves, so that water accumulation in the cylinder body is prevented; the rain-proof cover can prevent rainwater from entering the barrel storage cavity, and the outer sides of the exhaust channel and the air inlet channel are both provided with metal mesh plates to prevent foreign matters from entering the barrel storage cavity.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic structural view of a concrete steel structural module in an embodiment of the present invention;
FIG. 2 is a schematic view of the top cover structure of the concrete steel plate structure module of the present invention;
FIG. 3 is a schematic view of a cylinder structure of a concrete steel plate structural module of the present invention;
FIG. 4 is a schematic view of the base structure of the concrete steel structural module of the present invention;
FIG. 5 is a schematic view of the rain cover structure of the concrete steel plate structure module of the present invention;
FIG. 6 is a schematic view of the inner shell of the cylinder of the concrete steel plate structural module of the present invention;
fig. 7 is a schematic view of the top cover shell structure of the concrete steel plate structure module of the invention.
In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustration is only schematic.
Wherein: 1. the rain cover comprises a top cover, 2, a cylinder, 3, a base, 4 and a rain cover;
101. top plate, 102, shell, 103, peg, 104, bottom plate, 105, lacing wire, 106, connecting column, 107, hanging ring, 108 and concrete;
201. top plate, 202, exhaust channel, 203, grid, 204, outer shell, 205, inner shell, 206, peg, 207, lacing wire, 208, limit buffer profile, 209, intake channel, 210, expanded metal, 211, bottom plate, 212, drain tank, 213, drain hole, 214, guide pin, 215, concrete, 216, hanger plate, 217, connecting post, 218, guide pin, 219, outer ring plate of pouring gate, 220, inner ring plate of pouring gate;
301. top plate, 302, shell, 303, peg, 304, bottom plate, 305, guide sleeve, 306, concrete, 307, lacing wire, 308, lifting lug seat, 309, lifting lug;
401. a cover body, 402 and a hanging ring; 2051. an upper case 2052, a ring plate 2053, and a lower case;
1021. upper housing 1022, annular plate 1023, lower housing.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
In a typical embodiment of the invention, referring to fig. 1-7, a concrete steel plate structural module for dry storage of spent fuel with high fuel consumption sequentially comprises a top cover 1, a cylinder 2 and a base 3 from top to bottom, wherein the top cover 1 is matched with the top end of the cylinder 2, the base 3 is matched with the bottom end of the cylinder 2, and a rain cover 4 is further connected to the top of the top cover 1.
Specifically, top cap 1, barrel 2 and base 3 all include steel casing, peg, lacing wire and fill the concrete in the steel casing, and base 3 detachable centering is placed in the bottom department at barrel 2 center, and top cap 1 detachably fixes at barrel 2 top, and barrel 2 inside cavity sets up, and top cap 1, barrel 2 and base 3 enclose jointly and become the annular cavity that is used for storing high burn spent fuel seal container.
As shown in fig. 1 and 3, the steel plate structural case of the cylinder 2 includes an inner case 205, an outer case 204, pegs 206, tie bars 207, a top plate 201, and a bottom plate 211;
the bodies of the inner shell 205 and the outer shell 204 are cylindrical, the inner shell 205 and the outer shell 204 are concentrically sleeved to form an annular cavity, and the top plate 201 and the bottom plate 211 are welded at the top end and the bottom end of the inner shell 205 and the outer shell 204 and are connected.
The pegs 206 and the tie bars 207 are uniformly distributed in the annular cavity, the pegs 206 are welded on the inner surface of the outer shell 204 and the outer surface of the inner shell 205, the pegs 206 are transversely arranged, the tie bars are also transversely arranged, and both ends of the tie bars are respectively welded with the inner shell 205 and the outer shell 204. The annular cavity between the inner shell 205 and the outer shell 204 is used for casting concrete, and the shell of the barrel steel plate structure completely covers the concrete. The peg 206 and the lacing wire 207 are combined with the concrete to form an integrated structure, so that the overall structural strength of the cylinder is high, and natural disasters such as earthquakes, wind, tornadoes, flying objects and the like can be resisted.
As shown in fig. 6, the inner shell of the barrel of the present embodiment is composed of an upper shell 2051, a ring plate 2052 and a lower shell 2053, the upper shell 2051 and the lower shell 2053 are concentrically arranged, and the diameter of the upper shell 2051 is larger than that of the lower shell 2053, the height of the upper shell 2051 is adapted to the height of the top cover 1, the upper shell 2051 and the lower shell 2053 are welded to the upper and lower surfaces of the ring plate 2052 respectively, forming a stepped structure which is convenient to cooperate with the top cover.
As shown in fig. 2, the barrel further includes an air inlet channel welded near the bottom of the annular cavity and an air outlet channel welded near the top of the annular cavity, the air inlet channel 209 and the air outlet channel 202 are all transversely arranged, the air inlet channel 209 and the air outlet channel 202 all penetrate through the annular cavity, one end of the air inlet channel extends to the outer surface of the outer shell 204, the other end of the air inlet channel extends to the annular cavity in the inner shell 205, and corresponding air inlet gaps corresponding to the air outlet channel and the air inlet channel are formed in the positions, near the bottom and the top, of the inner shell and the outer shell of the barrel so as to conveniently arrange the air inlet channel 209 and the air outlet channel 202.
The annular cavity of the concrete steel plate structural module is communicated with the external atmosphere through the air inlet channel 209 and the air outlet channel 202, so that a passive natural convection channel which axially flows along the annular cavity is formed between the inner surface of the inner shell 205 of the cylinder and the outer surface of the spent fuel sealed container.
The exhaust channel 202 and the air inlet channel 209 are both in-line channels and are staggered with the bottom surface of the top cover 1 and the top surface of the base 3 by set distances respectively, so that the air flow resistance is effectively reduced, and the waste heat discharging capability is improved. The exhaust passage 202 is located below the bottom surface of the top cover 1, on the lower housing 2053, and communicates with the lower housing 2053; the air intake passage 209 is lower than the top surface of the base 3.
The gamma shielding grids 208 are arranged in the exhaust channel and the air inlet channel and used for reducing radiation dose of the exhaust port and the air inlet and improving radiation shielding effect of the exhaust channel and the air inlet channel. The outer sides of the exhaust passage and the intake passage are both provided with a metal mesh plate 210 to prevent foreign matters from entering the cylinder annular cavity.
The cartridge also includes a hanger plate 216 and a connecting post 217; a U-shaped groove is formed in the middle of the hanging plate, and the connecting column is embedded in the U-shaped groove and is connected with the hanging plate in a welding way; the hanging plates 216 are uniformly arranged on the top of the annular cavity of the cylinder 2 and are respectively welded with the inner shell 205 and the outer shell 204 of the cylinder; the top of the connecting post 217 is provided with a hoisting bolt hole for hoisting; the corresponding area of the cylinder top plate 201 is provided with a notch, the hanging plate 216 is positioned below the top plate, and the notch is arranged so as not to interfere when being hung by the connecting column 217. The hanger plate 216 of the present embodiment has a set thickness, and the exhaust passage 202 is opened on the hanger plate 216.
A pouring orifice ring plate is arranged between the inner side surface of the top of the outer shell and the outer side surface of the top of the inner shell, specifically, the inner shell and the top of the outer shell of the barrel are respectively provided with a pouring orifice inner ring plate 220 and a pouring orifice outer ring plate 219, the pouring orifice inner ring plate 220 is arranged on the outer side surface of the upper shell 2051, the pouring orifice outer ring plate 219 is arranged on the inner side surface of the outer shell 204, and the arrangement of the pouring orifice inner ring plate 220 and the pouring orifice outer ring plate 219 can reduce the thermal influence on the regional concrete 215 when the barrel top plate 201 is welded with the inner shell and the outer shell of the barrel.
The inner wall surface of the inner shell of the cylinder is uniformly provided with limiting buffer section steel 208, the limiting buffer section steel 208 is vertically arranged and distributed annularly along the inner side surface of the inner shell, and the limiting buffer section steel 208 is used for limiting a spent fuel sealed container stored in a concrete steel plate structure module and relieving impact load of the spent fuel sealed container when the concrete steel plate structure module is overturned.
The top plate 201 of the barrel is provided with a guide pin 218 for mounting and positioning with the adapter to facilitate the loading operation of the spent fuel sealed container. The cartridge top plate 201 is provided with bolt holes for connecting the top cover 1, the rain cover 4 and the adaptor. The bottom plate 211 of the cylinder 2 is provided with a guide pin 214 for mounting and positioning the base 3. The bottom plate 211 of the cylinder 2 is also provided with a drain hole 213 and a drain groove 212, so that water accumulation in the cylinder 2 is prevented, and corrosion of the water accumulation to the steel structure is reduced.
The barrel 2 of this embodiment can adopt and open the top and pour the scheme, after accomplishing barrel 2 annular cavity concrete casting, will hang the board 216 earlier with barrel inner shell 205 and shell 204 welding, later with roof 201 respectively with barrel inner shell and shell top welding above hang the board 216, open the top and pour the convenience that has improved concrete placement construction, effectively guarantee the compactness of concrete filling.
The steel plate structural shells of the top cover 1 and the base 3 comprise shells, pegs, lacing wires, a top plate and a bottom plate; the top plate and the bottom plate are respectively welded at the top and the bottom of the shell to form a closed cavity; the pegs and the lacing wires are uniformly distributed in the cavity; the concrete is poured and filled in the closed cavity, and the steel plate structural shells of the top cover and the base completely cover the concrete.
As shown in fig. 1 and 3, the top cover 1 is fixed to the top of the annular cylinder by bolts. The top cover 1 comprises a shell, wherein the shell comprises a top plate 101, a shell 102 and a bottom plate 104, concrete 108 is poured in the shell, the top plate 101 is welded with the top of the shell 102, and the bottom plate 104 is welded with the bottom of the shell 102. As shown in fig. 7, the structure of the housing 102 is the same as the inner housing structure of the cylinder 2, and is also a stepped structure, so that the abutting fit between the housing 102 and the inner housing 205 is facilitated. The housing 102 includes an upper housing 1021, a ring plate 1022, and a lower housing 1023, the upper housing and the lower housing being concentrically arranged, the upper housing 1021 and the lower housing 1023 being connected by the ring plate 1022 disposed laterally. The dimensions of the ring plate 1022 and the ring plate 2052 are adapted.
The ladder structures on the top cover 1 and the cylinder body 2 are matched with each other, so that the radiation shielding effect of the top of the concrete steel plate structure module can be effectively improved.
As shown in fig. 2, a hoisting structure is arranged at the top of the shell 102 of the top cover, and comprises a connecting column 106 and a hoisting ring 107, wherein the connecting column is welded with the top plate and the bottom plate of the top cover respectively, and bolt holes are formed in the top of the connecting column for installing the hoisting ring 107. The lacing wires 105 are vertically distributed, one end of each lacing wire is welded with the bottom plate 104, and the other end of each lacing wire is welded with the top plate 101; the peg 103 is welded laterally to the housing.
It will be appreciated that the top cover of this embodiment has a gap between the side of the lower housing 1023 and the inner side of the inner housing of the cartridge, thereby forming a narrow slit space. The gas is conveniently discharged from the exhaust channel 202 after carrying heat through the narrow slits.
The side surface of the lower shell 1023 of the top cover 1 and the side surface of the base 3 of the top cover 1 respectively keep a certain gap with the inner surface of the inner shell of the cylinder body to form a narrow slit space; meanwhile, the exhaust channel 202 and the air inlet channel 209 are staggered with the bottom plane of the top cover and the upper plane of the base by a certain distance, so that an L-shaped labyrinth structure is integrally formed, and the radiation shielding effect of the exhaust channel and the air inlet channel is effectively improved.
As shown in fig. 4, the base comprises a top plate 301, a shell 302 and a bottom plate 304, concrete 306 is poured in the shell 302, the top plate 301 and the bottom plate 304 are welded at two ends of the shell 302, a guide sleeve 305 is arranged on the bottom plate, the lower part of the guide sleeve 305 is opened, the position of the guide sleeve is matched with the guide pin 214, and the guide pin 214 is arranged at an annular cavity at the top of the bottom plate 211. When the base 3 is installed, the base 3 is hoisted into the annular cavity and descends until the guide sleeve 305 is clamped with the guide pin 214 for installation and positioning, and the base is not connected with the cylinder body and is in sliding fit with the cylinder body.
The lacing wire 307 is vertically welded inside the shell, one end of the lacing wire is connected with the bottom plate 304, the other end of the lacing wire is connected with the top plate 301, and the stud 303 is welded on the inner side surface of the shell. The base also comprises a hook-shaped lifting lug 309 and a lifting lug seat 308, which are embedded in the base 3; the lug welds with the backplate on the lug seat, and lug seat welds with base roof and casing.
The base hoisting points are hook-shaped lifting lugs which are embedded, and after the base is hoisted in place, ropes can be automatically recovered; the hoisting operation is convenient. The side surface of the base and the inner surface of the inner shell of the cylinder body keep a certain gap to form a narrow slit space.
As shown in fig. 5, the rain cover 4 has a larger diameter than the top cover, and the rain cover 4 is mounted on a lower surface than the top cover 1, preventing rainwater from entering the inner cavity of the cylinder. The rain cover comprises a cover body 401 and a hanging ring 402. The exposed surfaces of the cylinder body, the top cover and the base are subjected to protection treatment by adopting thermal spraying zinc, so that the rust resistance of the material is improved.
The top cover 1, the cylinder 2 and the base 3 of the embodiment are all independent components, can be constructed independently, can be cast with concrete independently, and finally are assembled in a modularized manner, so that the overall construction difficulty is low, and the installation is convenient; the independent components are provided with independent hoisting points.
The cylinder body 2, the top cover 1 and the base 3 are all concrete steel plate structural modules, the inner side surface of the shell is welded with the bolts and the lacing wires, and finally concrete is integrally poured, so that the structural strength is high, natural disasters such as earthquake, wind, tornado, flying objects and the like can be resisted, and the structural strength is high; the stud and the lacing wire improve the structural strength and the overall heat conducting performance of the module.
Hoisting the cylinder to a storage position through a threaded hole on the cylinder connecting column 217; placing the base on the bottom of the cylinder by a base lifting lug 309, and positioning the base 3 and the cylinder 2 by a guide pin 214 on the bottom of the cylinder; the spent fuel sealed container loading related equipment such as an adapter is connected through the cylinder top plate guide pin 218 and the corresponding bolt hole of the cylinder top plate 201, and the spent fuel sealed container is placed on the base 3 along the limit buffer section steel 208.
The top cover 1 is hung on the cylinder 2 through the top cover hanging ring 107 and is connected with the cylinder top plate 201 through bolts; the cylinder top plate guide pin 218 and the top cover hanging ring 107 are removed, and the rain cover is hung above the top cover 1 through the rain cover hanging ring 402 and is connected and fixed with the cylinder top plate 201 through bolts. Air enters the cavity of the concrete steel plate structure module through the cylinder air inlet channel 209, and after being heated, the air ascends along a long and narrow slit space surrounded by the base 3, the sealing container, the top cover 1 and the cylinder inner shell 205, and finally is discharged through the exhaust channel, so that passive waste heat discharge air circulation is realized.
When the concrete steel plate structure module is used, the top cover, the cylinder body and the base jointly enclose an annular cavity for storing the high-burnup spent fuel sealing container, and structural protection and radiation shielding are provided for the spent fuel sealing container. The bottom and the top of the cylinder body are respectively provided with an air inlet channel and an air outlet channel which are communicated with the external atmosphere, so that a passive natural convection channel which axially flows along the annular cavity is formed between the inner surface of the inner shell of the cylinder body and the outer surface of the spent fuel sealing container, decay heat of the spent fuel is taken away, and the temperature of the spent fuel is kept below a safety limit value.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The concrete steel plate structure module for dry storage of the spent fuel with high fuel consumption is characterized by comprising a top cover, a barrel and a base, wherein the barrel shell is an outer shell and an inner shell which are concentrically arranged, an annular cavity is formed in the inner shell, a stepped structure is formed at the top of the inner shell, the bottom of the shell is connected with a bottom plate, the top of the shell is connected with a top plate, the base can be slidably matched with the annular cavity and clamped on the bottom plate, and the top cover is connected with the top of the barrel and matched with the stepped structure;
the bottom of the shell is transversely provided with an air inlet channel, the top of the shell is transversely provided with an air outlet channel, the air inlet channel and the air outlet channel are communicated with the annular cavity, a set gap is reserved between the base and the inner shell and between the top cover and the step structure, and the air inlet channel and the top surface of the base and the air outlet channel and the bottom surface of the top cover are staggered to form an L-shaped labyrinth air outlet channel; the top cover, the cylinder body and the base are internally provided with reinforcing parts and concrete is poured.
2. The concrete steel plate structural module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein the inner shell comprises an upper shell and a lower shell, the diameter of the upper shell is larger than that of the lower shell, and the upper shell and the lower shell are connected through a transverse annular plate to form a ladder structure.
3. The concrete steel plate structure module for dry storage of high-burnup spent fuel according to claim 1, wherein limit buffer section steel is arranged on the inner side surface of the inner shell in a circumferential direction, and the limit buffer section steel is arranged vertically.
4. The concrete steel plate structure module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein the annular cavity on the bottom plate is provided with a guide pin for being matched with the base, and the bottom plate is also provided with a water flowing hole and a water draining groove.
5. The concrete steel plate structure module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein a hanging plate is connected between the outer shell and the inner shell near the top, a connecting part for hanging is arranged on the hanging plate, the top plate is arranged at the top of the hanging plate, and a pouring collar plate is arranged between the inner side surface of the top of the outer shell and the outer side surface of the top of the inner shell.
6. The concrete steel plate structural module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein the air inlet channel and the air outlet channel are arranged in a straight shape, a grid is arranged inside the air inlet channel and the air outlet channel, and the air inlet channel and the air outlet channel extend outside the shell and are provided with metal mesh plates.
7. The concrete steel plate structure module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein the top cover comprises a shell, a top plate is arranged at the top of the shell, a bottom plate is arranged at the bottom of the shell, the reinforcement is arranged inside the shell, the outer side surface of the shell is also in a stepped structure and is matched with the inner shell, and a hoisting structure is arranged at the top of the shell.
8. The concrete steel plate structure module for dry storage of spent fuel with high fuel consumption according to claim 1, wherein the base also comprises a shell, the reinforcement is welded inside the shell, a guide sleeve is arranged at the bottom of the base and is used for being clamped with a guide pin on a bottom plate of the cylinder, the outer diameter of the base is smaller than the inner diameter of the inner shell, and a hook-shaped lifting lug is arranged at the top of the base.
9. The concrete steel structural module for dry storage of spent fuel with high burnup according to claim 1, further comprising a rain cover for mounting on top of the top cover.
10. The concrete steel plate structural module for dry storage of spent fuel with high burnup according to claim 1, wherein the reinforcing members are studs and tie bars.
CN202310724798.3A 2023-06-16 2023-06-16 Concrete steel plate structure module for dry storage of spent fuel with high burnup Pending CN116759128A (en)

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CN202310724798.3A CN116759128A (en) 2023-06-16 2023-06-16 Concrete steel plate structure module for dry storage of spent fuel with high burnup

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Application Number Priority Date Filing Date Title
CN202310724798.3A CN116759128A (en) 2023-06-16 2023-06-16 Concrete steel plate structure module for dry storage of spent fuel with high burnup

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CN116759128A true CN116759128A (en) 2023-09-15

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CN202310724798.3A Pending CN116759128A (en) 2023-06-16 2023-06-16 Concrete steel plate structure module for dry storage of spent fuel with high burnup

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