CN112530609B - Shielding device for compact arrangement of small stacks - Google Patents
Shielding device for compact arrangement of small stacks Download PDFInfo
- Publication number
- CN112530609B CN112530609B CN202011346779.4A CN202011346779A CN112530609B CN 112530609 B CN112530609 B CN 112530609B CN 202011346779 A CN202011346779 A CN 202011346779A CN 112530609 B CN112530609 B CN 112530609B
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- CN
- China
- Prior art keywords
- shielding
- cover body
- shielding cover
- supporting member
- modules
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- 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.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000001629 suppression Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims 1
- 238000013022 venting Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 238000007689 inspection Methods 0.000 abstract description 5
- 238000005253 cladding Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000754 repressing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/06—Reflecting shields, i.e. for minimising loss of neutrons
-
- 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 shielding device for compactly arranging a small-sized pile, which is arranged inwards along an equipment annular cavity of a repression water tank and clings to the vertical surface of the annular cavity of the repression water tank, and comprises the following components: the shielding cover body is arranged into a plurality of layers, each layer of shielding cover body is formed by splicing and enclosing a plurality of shielding modules, and a plurality of assembly positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the bottom shield, wherein: the shielding cover body is tightly attached to the vertical face of the equipment annular cavity of the pressure-restraining water tank through the stop member and the supporting member. The shielding device for compactly arranging the small stacks can realize the disassembly and assembly of modularized dividing positions, effectively utilize the space and do not influence the in-service inspection of the main equipment; the structure is simplified, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.
Description
Technical Field
The invention relates to the field of nuclear power, in particular to a shielding device for compactly arranging a small-sized pile.
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 technical problem to be solved by the invention is to provide the shielding device for compact arrangement of the small-sized stacks, which can realize modular partition position disassembly and assembly, effectively utilize space and does not influence in-service inspection of the main equipment; the structure is simplified, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.
To solve the above-mentioned technical problems, an embodiment of the present invention provides a shielding device for compact arrangement of a small stack, which is disposed inward along an equipment ring cavity of a suppression pool and is closely attached to a vertical surface of the suppression pool ring cavity, including: the shielding cover body is arranged into a plurality of layers, each layer of shielding cover body is formed by splicing and enclosing a plurality of shielding modules, a plurality of assembly positions for placing reactor components are arranged on the shielding cover body, and the shielding cover body is assembled in a modularized and regional mode; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and to an end of the bottom shield, wherein: the shielding cover body is tightly attached to the vertical face of the equipment annular cavity of the pressure-restraining water tank through the stop member and the supporting member;
the shielding module is of a hollow structure, one or more shielding materials are filled in the shielding module, the shielding materials are embedded, the shielding module is of a stainless steel shell structure, and welding seams of the stainless steel shell are continuous and full-penetration welding seams;
the backing member is the backup pad, and the backup pad welds with the facade in repressing pond owner equipment chamber, and the stopper member provides the installation reference surface, and the stopper member includes: bottom and middle stops, wherein: one end of the bottom stop block is connected with the structure, and the side surface of the bottom stop block is fastened on the vertical surface of the shielding module; the middle stop block is connected to the vertical surfaces of two adjacent shielding modules through the supporting members; is secured to the steel structural platform for compact placement of the shielding means of the mini-stack.
Wherein the stainless steel ladle is provided with an opening for exhausting.
Wherein, the polylith shielding module adopts overlap joint or miter joint's mode to connect to guarantee no leak.
The shielding device for compactly arranging the small stacks has the following beneficial effects: the shielding device for compact arrangement of a small stack comprises: comprising the following steps: the shielding cover body is arranged into a plurality of layers, each layer of shielding cover body is formed by splicing and enclosing a plurality of shielding modules, and a plurality of assembly positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the bottom shield, wherein: the shielding cover body is tightly attached to the vertical face of the equipment annular cavity of the pressure-restraining water tank through the stop member and the supporting member, so that the modular partition position disassembly and assembly can be realized, the space is effectively utilized, and the in-service inspection of the main equipment is not influenced; the structure is simplified, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.
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 overall structure of a shielding device for compactly arranging a small stack according to an embodiment of the present invention.
Fig. 2 is a schematic side view of a shielding device for compact arrangement of a small stack 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 a first embodiment of the shielding device for compact placement of a small stack of the present invention.
The shielding device 3 for compact arrangement of the small stacks in the embodiment is arranged inwards along the equipment annular cavity of the suppression pool and clings to the vertical surface of the annular cavity of the suppression pool, and the top of the shielding device is fixed with the steel structure platform. The method specifically comprises the following steps: the shield case 31 and the shield case 31 are formed in multiple layers, and in this embodiment, the upper and lower layers 31a and 31b are formed in this embodiment, and may be formed in multiple layers in other embodiments. Each layer of shielding cover body 31 is formed by splicing and enclosing a plurality of shielding modules T, and a plurality of assembly positions 31c for placing reactor components are arranged on the shielding cover body 31; a supporting member 32 is arranged between the shielding cover bodies 31a and 31b of the adjacent layers, and two opposite sides of the supporting member 32 are fastened on at least two adjacent shielding modules; and a stop member 33 fastened to the support member 32 and/or to the end of the bottom shield, wherein: the shield is held against the vertical face of the equipment ring cavity of the hold-down basin by the stop member 33 and the support member 32.
The shielding cover 31 is assembled in a modularized and regional manner, and the basic assembly unit is a shielding module T, so that a limited space is utilized. Meanwhile, the whole device is detachable, and in-service inspection of the main equipment is not affected.
In specific implementation, the shielding module T is a hollow stainless steel shell structure, and the welding seam on the stainless steel shell is a continuous full-penetration welding seam. The shielding module T is internally filled with one or more shielding materials in a damascene arrangement. After the assembly of the shielding module T is completed, the shielding device 3 is formed, and the self-stability is good. It will be appreciated that: the number of the shielding modules T and the manner of splicing are not limited, and they may be overlapped or mitered according to the shielding effect required and the overall shape of the components such as the pressure vessel to be adapted, so as to ensure no leakage. Wherein: the stainless steel cladding of the shielding module T is provided with an opening for exhausting.
Further, the supporting member 32 is disposed between the shielding cases 31a, 31b of the adjacent layers, the supporting member 32 in this embodiment is a supporting plate, the supporting plate is welded to the vertical surface of the main equipment chamber of the suppression pool, and the stop member 33 provides a mounting reference surface.
Further, the stopper member 33 includes: bottom stop 331 and middle stop 332, wherein: one end of the bottom stop block 331 is connected with the structure, and the side surface of the bottom stop block is fastened on the vertical surface of the shielding module T; the middle stop 332 is connected to the elevation of two adjacent shielding modules by the support member 32.
The shielding device 3 in the embodiment can reduce neutrons and photons scattered out of the reactor cabin and reduce irradiation damage to the equipment at the connected cabin sections; the shielding device 3 can protect the safety of power plant staff and maintainers, reduce neutrons and photons leaked from the reactor cabin, lighten the activation of materials outside the shielding cover, reduce the activation source items in the safety during shutdown, and more effectively reduce the weight of secondary shielding of the reactor so as to reduce the construction cost.
The shielding device for compact arrangement of small stacks embodying the invention has the following beneficial effects: the shielding device for compact arrangement of a small stack comprises: comprising the following steps: the shielding cover body is arranged into a plurality of layers, each layer of shielding cover body is formed by splicing and enclosing a plurality of shielding modules, and a plurality of assembly positions for placing reactor components are arranged on the shielding cover body; a supporting member is arranged between the shielding cover bodies of the adjacent layers, and two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and a stop member secured to the support member and/or to an end of the bottom shield, wherein: the shielding cover body is tightly attached to the vertical face of the equipment annular cavity of the pressure-restraining water tank through the stop member and the supporting member, so that the modular partition position disassembly and assembly can be realized, the space is effectively utilized, and the in-service inspection of the main equipment is not influenced; the structure is simplified, the weight of the secondary shielding of the reactor is effectively reduced, and the construction cost is reduced.
Claims (3)
1. A shielding device for a compact arrangement of a small stack disposed inwardly along an equipment enclosure of a hold-down tank and in close proximity to an enclosure facade of the hold-down tank, comprising:
the shielding cover body is arranged into a plurality of layers, each layer of shielding cover body is formed by splicing and enclosing a plurality of shielding modules, a plurality of assembly positions for placing reactor components are arranged on the shielding cover body, and the shielding cover body is assembled in a modularized and regional mode;
a supporting member is arranged between the shielding cover bodies of the adjacent layers, and two opposite sides of the supporting member are fastened on at least two adjacent shielding modules; and
a stop member secured to the support member and to an end of the bottom shield, wherein:
the shielding cover body is tightly attached to the vertical face of the equipment ring cavity of the pressure restraining water tank through the stop member and the supporting member;
the shielding module is of a hollow structure, one or more shielding materials are filled in the shielding module, the shielding materials are embedded, the shielding module is of a stainless steel shell structure, and welding seams of the stainless steel shell are continuous and full-penetration welding seams;
the supporting component is the backup pad, the backup pad welds with the facade in the main equipment chamber of suppression pond, for the backstop component provides the installation reference surface, the backstop component includes: bottom and middle stops, wherein: one end of the bottom stop block is connected with the structure, and the side surface of the bottom stop block is fastened on the vertical surface of the shielding module; the middle stop block is connected to the vertical surfaces of two adjacent shielding modules through the supporting members;
the top of the shielding device for compact arrangement of the small stacks is fixed with the steel structure platform.
2. The shielding device for a compact stack of claim 1, wherein the stainless steel enclosure is provided with an aperture for venting air.
3. The shielding device for a compact stack of claim 1, wherein the plurality of shielding modules are joined in a lap joint or miter joint to ensure no leaks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346779.4A CN112530609B (en) | 2020-11-26 | 2020-11-26 | Shielding device for compact arrangement of small stacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346779.4A CN112530609B (en) | 2020-11-26 | 2020-11-26 | Shielding device for compact arrangement of small stacks |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112530609A CN112530609A (en) | 2021-03-19 |
| CN112530609B true CN112530609B (en) | 2024-03-01 |
Family
ID=74993664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011346779.4A Active CN112530609B (en) | 2020-11-26 | 2020-11-26 | Shielding device for compact arrangement of small stacks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112530609B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432932A (en) * | 1980-11-10 | 1984-02-21 | Earl B. Jacobson | Reactor head shielding system |
| JPH08170441A (en) * | 1994-12-19 | 1996-07-02 | Ishikawajima Harima Heavy Ind Co Ltd | Shield of reactor pressure vessel and method for constructing same |
| JP2001116883A (en) * | 1999-10-15 | 2001-04-27 | Yoshizawa La Kk | Radiation shield with little shielding defect and radioactive material containment vessel |
| JP2003043189A (en) * | 2001-07-27 | 2003-02-13 | Babcock Hitachi Kk | Radioactive ray shield |
| JP2013250170A (en) * | 2012-05-31 | 2013-12-12 | Ihi Infrastructure Systems Co Ltd | Radiation shield unit and radiation shield module |
| CN107731320A (en) * | 2017-11-01 | 2018-02-23 | 上海核工程研究设计院有限公司 | A kind of radiation shielding structure applied to nuclear power station |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
| CN208208351U (en) * | 2018-04-16 | 2018-12-07 | 安徽应流久源核能新材料科技有限公司 | A kind of splicing structure of metallic insulation boron carbide shielding block |
| CN109390061A (en) * | 2018-09-17 | 2019-02-26 | 中国核电工程有限公司 | A kind of nuclear power plant's reator body shielded plug |
| CN208982893U (en) * | 2018-08-01 | 2019-06-14 | 中广核研究院有限公司 | Reactor is layered supporting arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6973758B2 (en) * | 2001-05-14 | 2005-12-13 | Rad Technology, Llc | Shielded structure for radiation treatment equipment and method of assembly |
| US6835945B2 (en) * | 2002-07-19 | 2004-12-28 | David B Mossor | Portable shielding system |
-
2020
- 2020-11-26 CN CN202011346779.4A patent/CN112530609B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432932A (en) * | 1980-11-10 | 1984-02-21 | Earl B. Jacobson | Reactor head shielding system |
| JPH08170441A (en) * | 1994-12-19 | 1996-07-02 | Ishikawajima Harima Heavy Ind Co Ltd | Shield of reactor pressure vessel and method for constructing same |
| JP2001116883A (en) * | 1999-10-15 | 2001-04-27 | Yoshizawa La Kk | Radiation shield with little shielding defect and radioactive material containment vessel |
| JP2003043189A (en) * | 2001-07-27 | 2003-02-13 | Babcock Hitachi Kk | Radioactive ray shield |
| JP2013250170A (en) * | 2012-05-31 | 2013-12-12 | Ihi Infrastructure Systems Co Ltd | Radiation shield unit and radiation shield module |
| CN107731320A (en) * | 2017-11-01 | 2018-02-23 | 上海核工程研究设计院有限公司 | A kind of radiation shielding structure applied to nuclear power station |
| CN208208351U (en) * | 2018-04-16 | 2018-12-07 | 安徽应流久源核能新材料科技有限公司 | A kind of splicing structure of metallic insulation boron carbide shielding block |
| CN108922643A (en) * | 2018-07-20 | 2018-11-30 | 中广核研究院有限公司 | A kind of small-sized heap reactor-loop overall structure of compact Layout |
| CN208982893U (en) * | 2018-08-01 | 2019-06-14 | 中广核研究院有限公司 | Reactor is layered supporting arrangement |
| CN109390061A (en) * | 2018-09-17 | 2019-02-26 | 中国核电工程有限公司 | A kind of nuclear power plant's reator body shielded plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112530609A (en) | 2021-03-19 |
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