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Replacement method for sodium liquid level instrument of sodium cooled fast reactor main container

A technology for sodium-cooled fast reactors and replacement methods, which is applied to reactors, reactor fuel elements, and greenhouse gas reduction, and can solve problems such as high installation requirements and complicated sodium level gauge technology, and achieve the effect of ensuring installation accuracy

Active Publication Date: 2018-08-21
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0007] Aiming at the complex technology and high installation requirements of the sodium level gauge, it is necessary to design a method that can meet the hot state replacement of the sodium level gauge, which can not only ensure the accurate and reliable installation of the sodium level gauge, but also satisfy the fast reactor operation Affected

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  • Replacement method for sodium liquid level instrument of sodium cooled fast reactor main container

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] A kind of sodium liquid level instrument (such as figure 1 Shown) replacement method is used to replace the sodium liquid level gauge on the main vessel of the sodium-cooled fast reactor on the spot (the scene is normal temperature condition) under the hot state, and is divided into three parts altogether, comprises the following steps:

[0039] The first part, the first sodium level gauge is separated from the isolation sleeve

[0040] Step S1, lifting the tooling for placing the first sodium level gauge, and placing it horizontally on the work site; the first sodium level gauge is the sodium level gauge to be installed in inventory;

[0041] Step S2, measure the size of each fixed position on the tooling, and determine the fixing scheme according to the outer diameter of the corresponding position of the first sodium level gauge, and fix the f...

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Abstract

Belonging to the technical field of nuclear reactor refrigeration, the invention in particular relates to a replacement method for a sodium liquid level instrument of a sodium cooled fast reactor maincontainer, and can achieve field replacement of the sodium liquid level instrument on the main container of a sodium cooled fast reactor. The method mainly includes the steps of: first part, separation of a first sodium liquid level meter from an isolation casing pipe; second part, disassembly of a second sodium liquid level meter; and third part, installation of the first sodium liquid level meter. Specifically, the first sodium liquid level meter is a stock to-be-installed sodium liquid level meter, and the second sodium liquid level meter is a to-be-disassembled sodium liquid level meter on the main container. The method provided by the invention can ensure smooth installation of the second sodium liquid level meter under a hot state, does not affect the operation of the fast reactor,and guarantees the installation precision of the second sodium liquid level meter.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor refrigeration, and in particular relates to a method for replacing a sodium liquid level gauge of a sodium-cooled fast reactor main vessel. Background technique [0002] Fast reactor, short for "fast neutron reactor", is the preferred reactor type for the fourth-generation advanced nuclear energy system in the world, representing the development direction of the fourth-generation nuclear energy system. The closed nuclear fuel cycle formed by it can increase the utilization rate of uranium resources to more than 60%, and can also reduce the generation of nuclear waste to the greatest extent, and realize the minimization of radioactive waste. The international community generally believes that the development and promotion of fast reactors can fundamentally solve the problem of sustainable and green development of world energy. [0003] The power density of the fast reactor is high, and the...

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Application Information

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IPC IPC(8): G21C19/20G21C19/22
CPCG21C19/207G21C19/22Y02E30/30
Inventor 张燕吴纯良马勇刚任开宏刘桂娟王盛凯靳海宾安月华田伊楠
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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