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Reactor pressure vessel maintenance process cover plate

A technology for a pressure vessel and a reactor, which is applied to the field of the cover plate of the overhaul process of the reactor pressure vessel to achieve the effects of protection from damage, good prevention of foreign objects, and guarantee of coaxiality

Pending Publication Date: 2022-04-15
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a reactor pressure vessel overhaul process cover plate, which solves the problem in the prior art that performing a series of work on (or near) the reactor pressure vessel flange has a great industrial safety risk

Method used

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  • Reactor pressure vessel maintenance process cover plate
  • Reactor pressure vessel maintenance process cover plate
  • Reactor pressure vessel maintenance process cover plate

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Embodiment Construction

[0066] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only a part of the embodiments of the present application, not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative efforts are within the protection scope of this application.

[0067] The inventors of the present application found in research that at present, no special process cover plate is designed to block the opening of the reactor pressure vessel in the maintenance process design of the unit, and the pressure vessel is completely open. Carrying out the above-mentioned series of maintenance activities under such on-site conditions will inevitabl...

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Abstract

The invention belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a reactor pressure vessel maintenance process cover plate which is developed according to field equipment distribution and various parameters on the premise that existing equipment is not damaged and normal development of various maintenance tasks is not affected. The open reactor pressure vessel is blocked, workers can pass through the reactor pressure vessel, the activity flexibility of the workers is improved, the working efficiency is improved, problems and potential safety hazards in the working development process are eliminated, tools, consumables and the like in the operation process are effectively prevented from falling into the reactor pressure vessel, and the good foreign matter prevention function is achieved.

Description

technical field [0001] The application belongs to the technical field of nuclear power plant reactor maintenance, and in particular relates to a reactor pressure vessel maintenance process cover plate. Background technique [0002] The reactor pressure vessel is an important part of the reactor. The reactor pressure vessel is the primary circuit coolant pressure boundary and the third barrier to prevent fission products from escaping. It is used to accommodate reactor internals and core components (such as fuel assemblies, control rod assemblies and burnable poison components) and other related components (such as measuring instruments, etc.). The reactor pressure vessel is generally welded by seven parts, and the uppermost part is the vessel flange. The container flange is integrally forged, and there are 54 bolt holes evenly distributed on the end face of the flange, which are used to install the main bolts. There are also two concentric "V"-shaped sealing grooves on the...

Claims

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Application Information

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IPC IPC(8): G21F3/00G21C17/00
CPCY02E30/30
Inventor 尤晓波易良川张建军曾振华曹晔刘勇隋震张军超赵翔万英杰
Owner JIANGSU NUCLEAR POWER CORP
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