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Nuclear power station conventional island desalted water distribution system full-stop overhauling method

A technology of distribution system and conventional island, which is applied in the field of nuclear power, can solve the problems that the desalinated water distribution system of conventional island cannot be completely stopped for maintenance, and achieves the effect of easy implementation and short distance

Active Publication Date: 2014-07-09
CHINA GENERAL NUCLEAR POWER OPERATION +1
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a convenient, fast, safe and low-cost nuclear power plant conventional island desalinated water distribution system full stop maintenance method

Method used

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  • Nuclear power station conventional island desalted water distribution system full-stop overhauling method
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  • Nuclear power station conventional island desalted water distribution system full-stop overhauling method

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Embodiment Construction

[0040] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] A method for complete shutdown and maintenance of a demineralized water distribution system on a conventional island of a nuclear power plant, comprising the following steps:

[0042] A. Ice blocking the main pipeline from the conventional island desalinated water distribution system to the unit; ice blocking refers to setting an ice blocking device on the main pipeline from the conventional island desalinated water distribution system to the unit, and freezing the water in the corresponding main pipeline through the ice blocking device Plug the pipeline and isolate the downstream pipeline.

[0043] The ice blocking device can be directly installed on the pipeline that needs to be repaired, and the refrigerant is poured into...

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Abstract

The invention discloses a nuclear power station conventional island desalted water distribution system full-stop overhauling method. The method comprises the steps that A, ice blockage is carried out on a main pipeline between a conventional island desalted water distribution system and a unit, and an isolating device and a connecting device are additionally arranged at the downstream part of ice blockage; B, a temporary water supply pipeline is connected to the connecting device from an SED, operation verification is carried out on the temporary water supply pipeline, and the temporary water supply pipeline is communicated with the main pipeline between the conventional island desalted water distribution system and the unit through the connecting device after the temporary water supply pipeline is qualified; C, the connecting device is opened to supply water to the unit, and then the isolating device is closed; D, the conventional island desalted water distribution system is made to stop fully, isolating and emptying are carried out, and damaged or aged devices on the main pipeline are replaced; E, a drain valve and a vent valve are opened fully, the system is filled with water, air in the system is exhausted, the system is washed, samples are taken for a laboratory test, and after the samples are qualified, the drain valve is closed, and the conventional island desalted water distribution system is put into operation; F, the connecting device is disconnected with the temporary water supply pipeline, and the connecting device is sealed. The nuclear power station conventional island desalted water distribution system full-stop overhauling method is convenient and rapid to implement, safe and low in cost.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and relates to a maintenance method, in particular to a complete shutdown maintenance method for a conventional island desalinated water distribution system of a nuclear power plant. Background technique [0002] The function of the conventional island demineralized water distribution system (SER) is to provide the unit with demineralized water with a pH of 9. After the SDA (desalinated water production system) completes the desalinated water production, it is transported to the DOSER401 / 402BA in the north of YA, and then from the DOSER401 / 402PO located in the basement of the YA factory, through the main pipe of the DOSER, and respectively through the nuclear island desalted water distribution system , The conventional island desalted water distribution system delivers desalted water to the nuclear island and the conventional island of the unit. [0003] In the existing nuclear power plant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D1/02
CPCY02E30/00
Inventor 陈英杰王晓峰王柏飞张朝辉刘凌风潘昭张涛吴义兵
Owner CHINA GENERAL NUCLEAR POWER OPERATION
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