CN108766608B - SC fractal structure of shielding wall of nuclear power station - Google Patents
SC fractal structure of shielding wall of nuclear power station Download PDFInfo
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- CN108766608B CN108766608B CN201810920311.8A CN201810920311A CN108766608B CN 108766608 B CN108766608 B CN 108766608B CN 201810920311 A CN201810920311 A CN 201810920311A CN 108766608 B CN108766608 B CN 108766608B
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- 239000010410 layer Substances 0.000 claims description 85
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000004873 anchoring Methods 0.000 claims description 12
- 239000002356 single layer Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 23
- 238000009434 installation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/12—Laminated shielding materials
- G21F1/125—Laminated shielding materials comprising metals
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to a nuclear power station shielding wall SC fractal structure, which forms a new combined module after re-fractal of the SC structure, wherein the combined module fully considers the technical feasibility and the scheduling of workshop manufacture, field assembly and field hoisting installation and the construction logic relation between the SC structure, a peripheral RC structure and a CV structure. And after fractal, the high-altitude operation of a large number of sub-modules is transferred to ground operation, so that the modular construction of the SC structure on the on-site critical path is realized. The modularized construction after the SC structure is re-fractal can effectively reduce the hoisting times of the SC structure, shorten the construction period of a site critical path, reduce the site high-altitude work load and ensure the construction precision and the site of the SC structure.
Description
Technical Field
The invention relates to the technical field of nuclear power construction, in particular to a SC fractal structure of a shielding wall of a nuclear power station.
Background
The CAP1400 nuclear power plant is a large advanced pressurized water reactor nuclear power plant with independent intellectual property and is developed on the basis of introducing an AP1000 third generation technology and is the first reactor in the world.
The shielding factory building of the CAP1400 nuclear power plant is one of the most important structures for resisting internal and external accidents of the nuclear power plant, has the main functions of radiation shielding, flyer protection, passive cooling, tornado resistance, earthquake event resistance and the like, and is designed into a steel plate concrete structure (hereinafter referred to as an SC structure) for the first time in order to further improve the capacity of the reactor factory building for resisting internal and external accidents.
The SC structure is a double-layer steel panel structure, the thickness of a wall body of a 1-17-layer module is 1.1m, the thickness of a steel plate is 20mm and 25mm, the outer radius is 23.985m, the inner radius is 22.885m, the SC structure is composed of 167 submodules, 15 submodules in a horizontal connection region, 4 submodules in a vertical connection region, 24 submodules in a 2-7-layer non-closed region, 120 submodules in an 8-17-layer whole circle region, the radian of the standard submodule is 30 degrees, and the height is 3m. The 18-19 layers are air inlet areas, the thickness of the wall body is 1.5m, the thickness of the steel plate is 40mm, the inner radius 22.485m, the outer radius 23.985m and the number of sub-modules is 64.
The SC structure module construction has the following characteristics:
the SC structure has the advantages of large number of sub-modules, construction according to design drawing, large number of module hoisting times, frequent use of a crane, high hoisting quality safety risk, high construction cost and long construction period on a site critical path.
SC structure module installation accuracy requirement is high: the radius and elevation mounting tolerance is only +/-6 mm, and meanwhile, the module assembly, deformation correction and welding workload are large and limited by overhead operation conditions, so that the design size requirement is difficult to guarantee on site.
Disclosure of Invention
The invention aims at providing a module fractal structure suitable for on-site construction of an SC structure, wherein a new combined module is formed after the SC structure is rebracted, and the combined module fully considers the technical feasibility and the scheduling of workshop manufacture, on-site assembly and on-site hoisting installation and the construction logic relation between the SC structure, a peripheral RC structure and a CV structure. And after fractal, the high-altitude operation of a large number of sub-modules is transferred to ground operation, so that the modular construction of the SC structure on the on-site critical path is realized. The modularized construction after the SC structure is re-fractal can effectively reduce the hoisting times of the SC structure, shorten the construction period of a site critical path, reduce the site high-altitude work load and ensure the construction precision and the site of the SC structure.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
The utility model provides a nuclear power station shielding wall SC fractal structure, is to the horizontal connection region, the vertical connection region, 2-7 layers of non-closed areas, 8-17 layers of whole circle areas, 18-19 layers of air inlet areas of SC structure module and is fractal again, constitutes new combination module.
The 6 sub-modules of the 1 st layer horizontal connection area are re-fractal, every 2 adjacent sub-modules form a combined module after fractal, and the 1 st layer horizontal connection area is totally divided into 3 combined modules after fractal.
The 9 sub-modules of the 7 th layer horizontal connection area are re-fractal, and 4 combined modules are formed in a conformal mode, wherein 1 combined module consists of 3 adjacent sub-modules, and the other 3 combined modules consist of 2 adjacent sub-modules, and the 7 th layer horizontal connection area is totally provided with 4 combined modules.
The 4 sub-modules of the vertical connection area and the 24 sub-modules of the 2-7 layers of non-closed areas are re-fractal. After fractal, 8 2-3 layers of non-closed region sub-modules, 1 section of 1 vertical connection region sub-module and vertical connection region anchoring steel bars form 2 five-in-one combined modules, and each five-in-one combined module consists of 1 vertical connection region sub-module, 4 2-3 layers of non-closed region sub-modules connected with the vertical connection region sub-modules and vertical connection region anchoring steel bars.
The method comprises the steps that 8 4-5 layers of non-closed area sub-modules, 12 nd section of vertical connection area sub-modules and vertical connection area anchoring steel bars form 2 five-in-one combined modules, and each combined module comprises 1 vertical connection area sub-module, 4-5 layers of non-closed area sub-modules connected with the vertical connection area sub-modules and vertical connection area anchoring steel bars form five-in-one combined module; the 8 sub-modules of the 6-7-layer non-closed area are formed into a four-in-one combined module by 4 adjacent sub-modules, and 6 combined modules are formed by the vertical connection area and the 2-7-layer non-closed area.
The 120 sub-modules of 8-17 layers are re-fractal, and after fractal, 8-9 layers, 10-11 layers, 12-13 layers, 14-15 layers and 16-17 layers form 5 double-layer whole-circle modules, and each double-layer whole-circle module consists of 24 sub-modules.
The 64 sub-modules of 18-19 layers are re-fractal, and after fractal, the 18 layers and 19 layers are combined into 2 single-layer whole-circle modules, wherein the 18 layers of single-layer whole-circle modules are 48 sub-modules, and the 19 layers of single-layer whole-circle modules are 16 sub-modules.
Compared with the prior art, the invention has the beneficial effects that:
The method carries out fractal on the SC structure module, has scientific and reasonable fractal scheme, and the on-site construction method after the fractal is simple and easy to implement, can effectively ensure the construction quality of the module, and has the following advantages compared with the prior art:
1. based on a design drawing, the SC structure module is re-fractal through scientific demonstration, and construction is carried out by adopting a re-fractal method, so that the construction progress of a site critical path is shortened to the maximum extent, and the construction period of the critical path can be saved by about one year.
2. The invention reduces the work of on-site high-altitude hoisting, assembly, deformation correction, welding and the like, transfers most high-altitude operation to ground operation, and can effectively control the construction quality safety of the module.
Drawings
FIG. 1 SC is a structural development.
FIG. 2 is an expanded view of the connection region.
FIG. 3 is an expanded view of the vertical attachment area, 2-7 layers of non-occluded areas.
Fig. 4 8-17 are expanded views of the full circle region.
Fig. 5-19 are expanded views of the inlet region of layers.
Description of the embodiments
The invention will be further illustrated with reference to specific examples.
The embodiment discloses a re-fractal method of an SC structure, which comprehensively considers the technical feasibility and the scheduling of workshop manufacture, field assembly and field hoisting installation and the construction logic relationship of the SC structure, a peripheral RC structure and a CV structure according to the characteristics of the SC structure, re-fractal an SC structure module to form a new combined module,
The 6 sub-modules of the 1 st layer horizontal connection area are re-fractal, every 2 adjacent sub-modules form a combined module after fractal, and the 1 st layer horizontal connection area is totally divided into 3 combined modules after fractal.
The 9 sub-modules of the 7 th layer horizontal connection area are re-fractal, and 4 combined modules are formed in a conformal mode, wherein 1 combined module consists of 3 adjacent sub-modules, and the other 3 combined modules consist of 2 adjacent sub-modules, and the 7 th layer horizontal connection area is totally provided with 4 combined modules.
The 4 sub-modules of the vertical connection area and the 24 sub-modules of the 2-7 layers of non-closed areas are re-fractal. After fractal, 8 2-3 layers of non-closed region sub-modules, 1 section of 1 vertical connection region sub-module and vertical connection region anchoring steel bars form 2 five-in-one combined modules, and each five-in-one combined module consists of 1 vertical connection region sub-module, 4 2-3 layers of non-closed region sub-modules connected with the vertical connection region sub-modules and vertical connection region anchoring steel bars; the method comprises the steps that 8 4-5 layers of non-closed area sub-modules, 12 nd section of vertical connection area sub-modules and vertical connection area anchoring steel bars form 2 five-in-one combined modules, and each combined module comprises 1 vertical connection area sub-module, 4-5 layers of non-closed area sub-modules connected with the vertical connection area sub-modules and vertical connection area anchoring steel bars form five-in-one combined module; the 8 sub-modules of the 6-7-layer non-closed area are formed into a four-in-one combined module by 4 adjacent sub-modules, and 6 combined modules are formed by the vertical connection area and the 2-7-layer non-closed area.
The 120 sub-modules of 8-17 layers are re-fractal, and after fractal, 8-9 layers, 10-11 layers, 12-13 layers, 14-15 layers and 16-17 layers form 5 double-layer whole-circle modules, and each double-layer whole-circle module consists of 24 sub-modules.
The 64 sub-modules of 18-19 layers are re-fractal, and after fractal, the 18 layers and 19 layers are combined into 2 single-layer whole-circle modules, wherein the 18 layers of single-layer whole-circle modules are 48 sub-modules, and the 19 layers of single-layer whole-circle modules are 16 sub-modules.
The present invention is not limited to the preferred embodiments, and any simple modification, equivalent replacement, and improvement made to the above embodiments by those skilled in the art without departing from the technical scope of the present invention, will fall within the scope of the present invention.
Claims (5)
1. The utility model provides a nuclear power station shielding wall SC fractal structure which characterized in that: re-fractal is carried out on a horizontal connection area, a vertical connection area, 2-7 layers of non-closed areas, 8-17 layers of whole circle areas and 18-19 layers of air inlet areas of the SC structure module to form a new combined module; 6 sub-modules of the 1 st layer horizontal connection area are re-fractal, every 2 adjacent sub-modules form a combined module after fractal, and 3 combined modules are arranged in the 1 st layer horizontal connection area after fractal; the 9 sub-modules of the 7 th layer horizontal connection area are re-fractal, and 4 combined modules are formed in a conformal mode, wherein 1 combined module consists of 3 adjacent sub-modules, and the other 3 combined modules consist of 2 adjacent sub-modules, and the 7 th layer horizontal connection area is totally provided with 4 combined modules.
2. The nuclear power plant shielding wall SC fractal structure according to claim 1, characterized in that: the 4 sub-modules of the vertical connection area and the 24 sub-modules of the 2-7 layers of non-closed areas are re-fractal; after fractal, 8 2-3 layers of non-closed region sub-modules, 1 section of 1 vertical connection region sub-module and vertical connection region anchoring steel bars form 2 five-in-one combined modules, and each five-in-one combined module consists of 1 vertical connection region sub-module, 4 2-3 layers of non-closed region sub-modules connected with the vertical connection region sub-modules and vertical connection region anchoring steel bars.
3. The nuclear power plant shielding wall SC fractal structure according to claim 2, characterized in that: the method comprises the steps that 8 4-5 layers of non-closed area sub-modules, 12 nd section of vertical connection area sub-modules and vertical connection area anchoring steel bars form 2 five-in-one combined modules, and each combined module comprises 1 vertical connection area sub-module, 4-5 layers of non-closed area sub-modules connected with the vertical connection area sub-modules and vertical connection area anchoring steel bars form five-in-one combined module; the 8 sub-modules of the 6-7-layer non-closed area are formed into a four-in-one combined module by 4 adjacent sub-modules, and 6 combined modules are formed by the vertical connection area and the 2-7-layer non-closed area.
4. The nuclear power plant shielding wall SC fractal structure according to claim 1, characterized in that: the 120 sub-modules of 8-17 layers are re-fractal, and after fractal, 8-9 layers, 10-11 layers, 12-13 layers, 14-15 layers and 16-17 layers form 5 double-layer whole-circle modules, and each double-layer whole-circle module consists of 24 sub-modules.
5. The nuclear power plant shielding wall SC fractal structure according to claim 1, characterized in that: the 64 sub-modules of 18-19 layers are re-fractal, and after fractal, the 18 layers and 19 layers are combined into 2 single-layer whole-circle modules, wherein the 18 layers of single-layer whole-circle modules are 48 sub-modules, and the 19 layers of single-layer whole-circle modules are 16 sub-modules.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208722578U (en) * | 2018-08-14 | 2019-04-09 | 中国核工业华兴建设有限公司 | A kind of nuclear power station barrier shield SC fractal structure |
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| JPH0677067B2 (en) * | 1989-06-13 | 1994-09-28 | 株式会社大林組 | Radiation shielding structure |
| JPH08201582A (en) * | 1995-01-31 | 1996-08-09 | Taisei Corp | Radiation shield body and its construction method |
| US20030041555A1 (en) * | 2000-05-19 | 2003-03-06 | Scallan L. Joe | Construction of high-rise building with large modular units |
| JP2004333345A (en) * | 2003-05-09 | 2004-11-25 | Fujita Corp | Construction method of radiation shielding concrete structure |
| DE102004063732B4 (en) * | 2004-12-29 | 2013-03-28 | Gsi Helmholtzzentrum Für Schwerionenforschung Gmbh | Radiation protection chamber with in particular a multi-layered radiation protection wall |
| ES2618313T3 (en) * | 2006-04-25 | 2017-06-21 | Jan Forster | Structural body for radiation protection constructions |
| CN101351111B (en) * | 2007-07-18 | 2010-09-29 | 北京固鸿科技有限公司 | Combined shielding house with leakage-proof structure |
| CN104658625B (en) * | 2015-01-20 | 2017-02-01 | 广东省建筑工程集团有限公司 | Proton waste beam station construction technique |
| CN104948228B (en) * | 2015-07-14 | 2017-04-19 | 广东省建筑工程集团有限公司 | Construction method of large high-precision anti-radiation tunnel shielding iron structure |
| CN106499195B (en) * | 2016-09-18 | 2018-12-11 | 中核能源科技有限公司 | A kind of method of construction of unilateral side steel plate concrete hollow combination roof system |
| CN107254922A (en) * | 2017-07-20 | 2017-10-17 | 李凯杰 | Integrally formed compound integrated form wall body module and its manufacture method |
| CN107724596B (en) * | 2017-10-09 | 2023-08-29 | 清华大学建筑设计研究院有限公司 | Partially prefabricated sandwich wallboard, wall structure thereof and building |
| CN207572073U (en) * | 2017-11-20 | 2018-07-03 | 东莞市基一核材有限公司 | Nuclear Power Industry high intensity radiation protection isolation board |
| CN108154940B (en) * | 2017-12-27 | 2023-04-07 | 中国核工业二四建设有限公司 | Pressurized water reactor nuclear power plant steel plate concrete structure module forming tool and forming process thereof |
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