CN112466483B - Cladding shell for compactly arranging small-sized stack shielding modules - Google Patents
Cladding shell for compactly arranging small-sized stack shielding modules Download PDFInfo
- Publication number
- CN112466483B CN112466483B CN202011346748.9A CN202011346748A CN112466483B CN 112466483 B CN112466483 B CN 112466483B CN 202011346748 A CN202011346748 A CN 202011346748A CN 112466483 B CN112466483 B CN 112466483B
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- China
- Prior art keywords
- cladding
- shielding
- shell
- shielding body
- positioning boss
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- 238000005253 cladding Methods 0.000 title claims abstract description 122
- 239000000463 material Substances 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 3
- 230000005489 elastic deformation Effects 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000003466 welding Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/08—Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield ; Thermal insulation
-
- 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
Abstract
The invention discloses a cladding housing for compact arrangement of small stack shielding modules, comprising: a shell with an opening at one end; a shield body which is arranged inside the cladding and is made of one material or a combination of a plurality of materials; a cover sealed over the open end of the enclosure, wherein: the side wall of the cladding is provided with a positioning boss outwards from the inside of the cladding, so that when the thermal expansion difference between the shielding body and the cladding at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity of the cladding shell is ensured; when the shielding body and the cladding of the cladding shell are in a cold state, the shielding body is contacted with the positioning boss. By implementing the cladding shell for compactly arranging the small-sized stack shielding module, the thermal expansion of the shielding body can be released when the thermal expansion difference between the shielding body and the cladding at the design temperature is smaller, so that the integrity and the reliability of the cladding shell are ensured; the structure is simplified, and the shielding effect is improved.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a cladding shell for compactly arranging a small-sized stack shielding module.
Background
In order to meet the use requirements of marine environments and the limitation of narrow arrangement space such as a cabin, a compact arrangement form is generally adopted for primary equipment of a primary nuclear island, such as integrated design, short pipe connection and the like. The shielding scheme of the existing small-sized reactor structure is not perfect enough, and the problems of large shielding structure design and implementation difficulty and the like exist.
In addition, the module is rectangular plate, need adopt the screw to carry out mechanical locking, arrange in the shielding face, shielding module adopts single face cladding, shielding material is density board etc. this structure can't satisfy the curved surface arrangement of piling hole, can't satisfy the high temperature of nearly heap department, can't satisfy shielding material cladding's leakproofness demand, can't satisfy the installation location demand in the narrow and small space of piling hole, and the density board can't satisfy neutron shielding demand.
Meanwhile, the existing small-sized reactor cannot be applied to environments with narrow main equipment spacing such as a main pump steam generator and higher requirements for shielding the reactor core and the outside of the reactor, for example: the existing small-sized reactor generally adopts the modes of integration or double-layer sleeve connection and the like, the size of the reactor pressure vessel is smaller, the inner wall of the RPV is closer to the reactor core, and neutrons reflected by the reactor core are easy to produce irradiation damage to the inner wall of the reactor pressure vessel; and the gap between the main devices is narrow, the main devices are closer to the reactor core, and the conventional common shielding structure cannot adapt to the installation of the structure.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cladding shell for compactly arranging a small-sized stack shielding module, which can release the thermal expansion of the shielding body when the thermal expansion difference between the shielding body and a cladding is smaller at the design temperature so as to ensure the integrity and the reliability of the cladding shell; the structure is simplified, and the shielding effect is improved.
In order to solve the above technical problems, an embodiment of the present invention provides a cladding case for compactly arranging a small-sized stack shielding module, including: a shell with an opening at one end; a shield body which is arranged inside the cladding and is made of one material or a combination of a plurality of materials; a cover sealed over the open end of the enclosure, wherein: the side wall of the cladding is provided with a positioning boss outwards from the inside of the cladding, so that when the thermal expansion difference between the shielding body and the cladding at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity of the cladding shell is ensured; when the shielding body and the cladding are in a cold state, the shielding body is in contact with the positioning boss; the shielding body can be plastically deformed at the position of the positioning boss; the positioning boss can elastically deform towards the outer side of the bag shell; the positioning boss is within the allowable yield limit of the cladding and is formed by stamping; the height of the positioning boss is determined by the thermal expansion difference between the shielding body and the cladding at the design temperature.
The shielding body comprises a first shielding body, a second shielding body and a third shielding body which are in block shapes, and the first shielding body, the second shielding body and the third shielding body of the cladding shell are sequentially attached to and placed in the cladding shell in parallel.
Wherein, at least one side of the cladding is provided with a miter joint or lap joint interface which can be mitered or lapped with other adjacent cladding shells.
The cladding is a stainless steel cladding, the stainless steel cladding is formed by welding a plurality of steel plates, and the welding seams of the plurality of steel plates are continuous and full-penetration welding seams.
Wherein, the cladding is stainless steel cladding, and stainless steel cladding is made by a sheet metal plate.
Wherein, be equipped with the trompil that is used for carrying out the exhaust on the apron.
The cladding shell for compactly arranging the small-sized stack shielding module has the following beneficial effects: the cladding casing includes: a shell with an opening at one end; a shield body which is arranged inside the cladding shell and is made of one material or a combination of a plurality of materials; a cover sealed over the cladding shell open end of the cladding shell enclosure, wherein: the side wall of the cladding shell is outwards protruded from the inside to set a positioning boss, so that when the thermal expansion difference between the shielding body and the cladding shell at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity of the cladding shell is ensured; when the cladding shell shielding body and the cladding shell are in a cold state, the cladding shell shielding body is in contact with the cladding shell positioning boss, so that when the thermal expansion difference between the shielding body and the cladding shell at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity and the reliability of the cladding shell are ensured; the structure is simplified, and the shielding effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the overall structure of a cladding housing for compactly arranging a small stack shielding module according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a burst structure of a cladding housing for compactly arranging a small stack shielding module according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, there is shown an embodiment of the cladding housing of the present invention for compact arrangement of a small stack shielding module.
The cladding case M structure for compactly disposing a small stack shield in the present embodiment includes: an enclosure 1 having an opening at one end, a shield 3 made of one material or a combination of materials provided inside the enclosure 1; a cover plate 2 sealed on the open end 11 of the enclosure 1, wherein the side wall of the enclosure 1 is provided with a positioning boss 4 protruding outwards from the inner part 1a of the cover plate 1, so as to release the thermal expansion of the shielding body 3 when the thermal expansion difference between the shielding body 3 and the enclosure 1 at the design temperature is smaller, thereby ensuring the integrity of the enclosure shell M; the shielding body 3 is in contact with the positioning boss 4 when the shielding body 3 and the cladding 1 of the cladding shell are in a cold state.
The enclosure 1 has a hollow structure with an opening 11 at one end, and in this embodiment, the enclosure 1 may have a hollow structure with another shape according to actual needs, as long as the inside of the enclosure is satisfied and the shielding body 3 can be mounted. When the envelope 1 is set to other shapes, the whole of the envelope housing M is a shaped piece.
Further, the cladding 1 is a stainless steel cladding, the stainless steel cladding is formed by welding a plurality of steel plates, and the welding seams of the plurality of steel plates are continuous and full-penetration welding seams. In other embodiments, the enclosure 1 may be a stainless steel enclosure made from a sheet of steel.
Further, at least one side of the envelope 1 is provided with a miter or lap joint interface enabling miter or lap joint with other adjacent cladding shells M. Thus, when the compact arrangement small-sized stacks adopt the split-area multi-layer superposition arrangement cladding shells M, each cladding shell M for compact arrangement of the small-sized stacks can realize the positioning and fixing of the upper and lower adjacent modules through the miter joint interface or the lap joint interface, so that the adjacent modules can be matched.
It will be appreciated that: miter joints or lap joints can also be provided on multiple sides of the enclosure 1, respectively, so as to satisfy the overall structural arrangement.
The cover plate 2 is sealed on the open end 11 of the enclosure 1, and is in a plate structure, and when in implementation, an opening 21 is selectively arranged in the middle of the cover plate 2 according to the material characteristics of the shielding body 3 in the enclosure 1, and the function of the opening is used for exhausting.
It will be appreciated that: when the whole of the cladding case M is formed as a special-shaped member, after the shielding body 3 is installed, the cover plate 2 may be welded according to the shape of the cladding 1, so that the shielding material is entirely clad inside the cladding 1. Therefore, under various working conditions, the shielding body 3/shielding material is free from overflowing, and related pore channels in the reactor cabin are not blocked.
The shielding 3 is provided inside the enclosure 1, which is made of one material or a combination of materials. By arranging the shielding body 3, the cladding shells M have a certain shielding function, so that when the compact arrangement of the small stacks adopts the split-area multi-layer superposition arrangement, each cladding shell M can realize the whole shielding function through shielding materials arranged in the cladding shells M.
Preferably, the shielding body 3 includes a first shielding body 31, a second shielding body 32 and a third shielding body 33 which are in a block shape, and the first shielding body 31, the second shielding body 32 and the third shielding body 33 are sequentially attached to each other and placed in parallel with each other in the enclosure 1. Through carrying out the rule to above-mentioned shield body and arranging, can strengthen the whole shielding effect of cladding casing M, also fill the shielding according to the shape of cladding 1 easily instead, promote the efficiency of assembly.
Further, the side wall of the envelope 1 is provided with a positioning boss 4 protruding from the inside 1a to the outside 1b thereof. The positioning boss 4 is within the allowable yield limit of the cladding and is formed by stamping; the height of the positioning boss 4 is determined by the difference in thermal expansion of the shield 3 and the envelope 1 at the design temperature.
The positioning boss 4 functions as follows:
when the thermal expansion difference between the cladding shell M and the cladding shell 1 is smaller at the design temperature, the thermal expansion of the shielding body 3 can be released advantageously, meanwhile, the integrity of the whole cladding shell M is ensured, and the normal realization of the shielding effect is ensured. Specifically, in a cold state, the positioning boss 4 is in contact with the shielding body 3, and the shielding body 3 is prevented from shaking back and forth on the cladding 1 in the face of a swinging working condition under a marine condition, so that the cladding 1 is fatigued under an alternating load; at the design temperature, the thermal expansion of the shielding body 3 can fill the whole cladding 1 with zero clearance; the shielding body 3 is arranged inside the cladding 1, plastic deformation is allowed to occur, in the thermal expansion process, tiny plastic deformation can occur at the positioning boss 4, the positioning boss 4 can elastically deform towards the outer side of the cladding 1, the positioning boss 4 and the cladding are overlapped, the large deformation of the cladding shell M is avoided, and then the installation integrity and reliability of the whole shielding device are guaranteed.
When the cladding shell for compactly arranging the small-sized stack shielding modules is specifically implemented, the processing of the cladding shell 1 can be designed and manufactured into regular cuboid or special-shaped pieces according to field requirements, and the cladding shell can be formed by one piece of steel plate metal plate or a plurality of pieces of steel plates through splice welding. Depending on the arrangement, one or more of its faces may be made to overlap or miter with other adjacent cladding shells. The height and position of the positioning boss 4 are determined according to the thermal expansion difference during the manufacturing process of the cladding 1. After the cladding 1 is completed, the shielding body 3 is filled in, so that the shielding body 3 is ensured to be in contact with the positioning boss 4 in a cold state, and the shielding body 3 is prevented from being displaced. Finally, according to the shape of the cladding 1, the cover plate 2 is welded, and the shielding body 3 is completely covered in the cladding 1. The shield body 3 is ensured not to overflow under various working conditions, and related pore channels in the reactor cabin are not blocked.
The cladding shell for compactly arranging the small-sized stack shielding module has the following beneficial effects: the cladding casing includes: a shell with an opening at one end; a shield body which is arranged inside the cladding shell and is made of one material or a combination of a plurality of materials; a cover sealed over the cladding shell open end of the cladding shell enclosure, wherein: the side wall of the cladding shell is outwards protruded from the inside to set a positioning boss, so that when the thermal expansion difference between the shielding body and the cladding shell at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity of the cladding shell is ensured; when the cladding shell shielding body and the cladding shell are in a cold state, the cladding shell shielding body is in contact with the cladding shell positioning boss, so that when the thermal expansion difference between the shielding body and the cladding shell at the design temperature is smaller, the thermal expansion of the shielding body is released, and the integrity and the reliability of the cladding shell are ensured; the structure is simplified, the shielding effect is improved, and when the thermal expansion difference between the shielding body and the cladding is smaller at the design temperature, the thermal expansion of the shielding body is released, so that the integrity and the reliability of the cladding shell are ensured; the structure is simplified, and the shielding effect is improved.
Claims (6)
1. A cladding enclosure for compact arrangement of small stack shielding modules, comprising:
a shell with an opening at one end;
a shield body provided inside the envelope and made of one material or a combination of materials;
a cover sealed over the open end of the enclosure, wherein:
the side wall of the cladding is provided with a positioning boss outwards from the inside of the cladding, and the positioning boss is used for releasing the thermal expansion of the shielding body when the thermal expansion difference between the shielding body and the cladding at the design temperature is smaller, so that the integrity of the cladding shell is ensured;
when the shielding body and the cladding are in a cold state, the shielding body is in contact with the positioning boss;
the shielding body can be subjected to plastic deformation at the position of the positioning boss, the positioning boss can be subjected to elastic deformation towards the outer side of the shell, and the positioning boss is within the allowable yield limit of the cladding and is formed through stamping; the height of the positioning boss is determined by the thermal expansion difference between the shielding body and the cladding at the design temperature.
2. The containment case for compactly arranging small stack shielding modules of claim 1, wherein the shielding includes a first shielding, a second shielding, and a third shielding in a block shape, the first shielding, the second shielding, and the third shielding being sequentially attached and placed in parallel with each other in the containment case.
3. Cladding casing for compact arrangement of small stack shielding modules according to claim 1 or 2, wherein at least one side of the cladding is provided with a miter or lap joint interface enabling miter or lap joint with other adjacent cladding casings.
4. The cladding enclosure for compact arrangement of small stack shielding modules of claim 1 or 2, wherein the enclosure is a stainless steel enclosure that is splice welded from a plurality of steel plates, the welds of the plurality of steel plates being continuous, full-penetration welds.
5. Cladding casing for compact arrangement of small stack shielding modules according to claim 1 or 2, wherein the cladding is a stainless steel cladding made of one sheet metal plate.
6. The containment case for compact stack shielding modules of claim 1 wherein said cover plate is provided with openings for venting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346748.9A CN112466483B (en) | 2020-11-26 | 2020-11-26 | Cladding shell for compactly arranging small-sized stack shielding modules |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346748.9A CN112466483B (en) | 2020-11-26 | 2020-11-26 | Cladding shell for compactly arranging small-sized stack shielding modules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112466483A CN112466483A (en) | 2021-03-09 |
| CN112466483B true CN112466483B (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011346748.9A Active CN112466483B (en) | 2020-11-26 | 2020-11-26 | Cladding shell for compactly arranging small-sized stack shielding modules |
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| FR2229014A1 (en) * | 1973-05-09 | 1974-12-06 | Commissariat Energie Atomique | Fixing insulating bricks to nuclear reactor shield walls - using T-bars connecting to holes in bricks |
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| FR2229014A1 (en) * | 1973-05-09 | 1974-12-06 | Commissariat Energie Atomique | Fixing insulating bricks to nuclear reactor shield walls - using T-bars connecting to holes in bricks |
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| Publication number | Publication date |
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| CN112466483A (en) | 2021-03-09 |
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