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Method for mounting bottom plates and cylinder of steel lining of nuclear power plant

An installation method and steel lining technology, applied in covering/lining, arc welding equipment, construction, etc., can solve the problems of large amount of steel lining installation welding, affecting weld sealing, wave deformation, etc., to shorten the installation and construction period, High welding efficiency and reduced construction period

Active Publication Date: 2012-11-21
CHINA NUCLEAR IND HUAXING CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The installation and welding volume of the steel lining is large, resulting in a long construction period. At the same time, due to the thin steel plate, wave deformation is prone to occur during welding, which affects the sealing of the weld seam

Method used

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  • Method for mounting bottom plates and cylinder of steel lining of nuclear power plant
  • Method for mounting bottom plates and cylinder of steel lining of nuclear power plant
  • Method for mounting bottom plates and cylinder of steel lining of nuclear power plant

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Embodiment Construction

[0034] Specific embodiments of the present invention will be described below with reference to the drawings.

[0035] The steel lining of the nuclear power plant in this embodiment includes a bottom plate 1 and a cylinder, which is subdivided into two parts: a truncated cone 19 and a cylinder wall 21 . Among them, the radius of the steel-lined bottom plate 1 is 17290mm; the radius of the lower mouth of the truncated cone 19 is 17299mm, and the radius of the upper mouth is 18500mm; 11 equally divided prefabricated panels are assembled and welded, and the 6th to 12th floors are assembled and welded by 9 prefabricated panels equally divided along the perimeter, and the height of each layer is 3777.5mm. The steel material of the steel lining is steel plate P265GH for pressure vessels, and the thickness of the steel plate is δ=6mm.

[0036] The steel lining installation process of the present embodiment is as follows:

[0037] Construction preparation → floor support system insta...

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Abstract

The invention provides a method for mounting bottom plates and a cylinder of a steel lining of a nuclear power plant. The bottom plates are basically circular, and are divided into circular center bosses, annular intermediate annular plates and annular edge plates which consist of a plurality of precast slabs from inside to outside; the cylinder comprises frustums and cylinder wall plates which are formed by splicing the plurality of precast slabs; and the cylinder wall plates are divided into a plurality of layers. The mounting method sequentially comprises the following steps of: mounting abottom plate support system; putting the bottom plates on the bottom plate support system; putting the frustums; welding the bottom plates and the frustums in pairs; and mounting each layer of cylinder wall plates from bottom to top respectively. By rationally setting a welding process and a construction assembly process, a mounting construction period of the steel lining is effectively shortened, and the sealability of welding seams of the steel lining is ensured.

Description

technical field [0001] The invention relates to a method for installing a bottom plate and a cylinder body of a steel lining of a nuclear power plant, in particular to a method for installing a steel liner bottom plate and a cylinder body of a nuclear power plant comprising a butt welding process of a bottom plate, a truncated cone, and a multi-layer cylinder wall plate. Background technique [0002] As a part of the containment shell of nuclear power plant, the steel lining of nuclear power plant is the third safety barrier and the last line of defense of the nuclear island. It plays a role in preventing nuclear leakage under extreme accidents, and its quality directly affects the civil construction of the nuclear island. Safety, reliability and service life during construction period and operation of nuclear power plants. The installation and welding of the steel lining is large, resulting in a long construction period. At the same time, due to the thin steel plate, wave d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K31/02B23K9/16B23K9/02E04F13/073
Inventor 程小华张科青马富巧梅文杰
Owner CHINA NUCLEAR IND HUAXING CONSTR
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