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Nuclear power plant valve membrane maintenance method

A technology for nuclear power plants and valves, which is applied in nuclear power plant auxiliary equipment, nuclear power generation, pumping devices, etc. It can solve the problems of long maintenance time of valve diaphragms, achieve the effect of improving function recovery ability, improving reliability and reducing working hours

Active Publication Date: 2020-06-12
LINGDONG NUCLEAR POWER +5
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for maintaining valve diaphragms in nuclear power plants, so as to solve the technical problem that the maintenance time of valve diaphragms in the prior art is too long

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  • Nuclear power plant valve membrane maintenance method

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Embodiment Construction

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046]It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations ...

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Abstract

The invention relates to the field of nuclear power plant auxiliary cooling water systems, and discloses a nuclear power plant valve membrane maintenance method. The method comprises the steps of isolating the area, with pipelines to be maintained, of a nuclear power plant, wherein the area with the pipelines to be maintained comprises a main pipeline, a plurality of branch pipelines and operatingpoint pipelines, the branch pipelines communicate with the main pipeline, the operating point pipelines communicate with the main pipeline, and operating point valves are arranged on the operating point pipelines; opening some operating point valve, and judging whether the water outlet quantity of the opened operating point valve is smaller than a preset water outlet threshold or not; and if thewater outlet quantity of the operating point valve is smaller than the preset water outlet threshold, carrying out maintenance on a valve membrane of an appointed valve in the area with the pipelinesto be maintained according to the preset maintenance procedure. With the nuclear power plant valve membrane maintenance method, it is implemented that maintenance without drainage can be carried out on the valves within the area with the pipelines to be maintained, the working efficiency of maintenance is greatly improved, and the working time of maintenance is shortened; and furthermore, in emergency, the functional recovery capacity of the equipment cooling water system is enhanced, and the reliability of a spent-fuel pool cold source is improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear auxiliary cooling water systems of nuclear power plants, and more specifically relates to a method for maintaining valve diaphragms of nuclear power plants. Background technique [0002] In order to ensure the safe and efficient operation of nuclear power plants, the valve diaphragms of nuclear power plants need to be overhauled at regular intervals. These valve diaphragms are mainly set in the branch pipes of the cooling water system of the unit equipment of the nuclear power plant. These branch pipes are connected to the main pipe. [0003] In the prior art, when overhauling the instrumentation equipment of a nuclear power plant, it is necessary to close the valve on the main pipeline, empty the fluid in the pipeline, and then maintain the valve diaphragm. However, due to the complex arrangement of the branch pipelines connecting the nuclear power plant with the main pipeline, and the long pip...

Claims

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Application Information

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IPC IPC(8): F17D1/08F17D1/14G21D1/02G21D1/04
CPCF17D1/08F17D1/14G21D1/02G21D1/04Y02E30/00
Inventor 黄权泉李积前何强
Owner LINGDONG NUCLEAR POWER
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