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Leakage test plug for leakage detection system on reactor upper assembly

A leak detection and reactor technology, which is used in reactors, nuclear reactor monitoring, climate sustainability, etc., can solve the problems of pressure and loss of sealing of the leakage detection system of the upper components, and achieve the effect of reducing operation time and radiation dose.

Active Publication Date: 2017-06-09
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 18 neutron temperature measurement channel tube bundles have been unsealed when the upper assembly is overhauled in the inspection well, and the leak detection tubes connected to these pipes are in a state of unsealed state, so it is impossible to directly suppress the leakage detection system of the upper assembly

Method used

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  • Leakage test plug for leakage detection system on reactor upper assembly
  • Leakage test plug for leakage detection system on reactor upper assembly
  • Leakage test plug for leakage detection system on reactor upper assembly

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 , 2 , 3, 4, 5, and 6, a leak detection system leak detection plug of the present invention, the plug includes an elongated plug 7, a rotary plug 10, an elongated plug 7, a rotary plug The head 10 is screwed through the shaft, and the elongated plug 7 and the rotary plug 10 include a positioning boss 13 on the top.

[0020] The rotary plug 10 is formed by fixing the plug and the shaft two by pins. The outer surface of the second shaft is a fully threaded structure, and cooperates with the nut 9 to provide the torque value required for sealing the leak detection nozzle on the neutron temperature measurement channel connection. The inside of the second shaft is a through hole structure, so that the first shaft of the elongated plug can freely expand and contract in it. Elongation plug 9 is to be fixed by pin by plug an...

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PUM

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Abstract

The invention relates to the field of nuclear power plant reactor overhauling, in particular to a leakage test plug for a leakage detection system on a reactor upper assembly. The plug comprises an elongated plug body and a rotary plug body, wherein the elongated plug body and the rotary plug body are connected through a shaft, and elongated plug body and the rotary plug body comprise location bosses at the upper portions. By means of the leakage test plug for the leakage detection system on the reactor upper assembly, a leakage detection pipe can be plugged conveniently and quickly, a leakage test can be successfully finished, operation time of the work is reduced, and exposure dose of operators is reduced.

Description

technical field [0001] The invention relates to the field of nuclear power plant reactor maintenance, in particular to a plug for leak detection system of a reactor upper component leakage detection system. Background technique [0002] The top cover of the nuclear power plant reactor upper assembly has the following nozzles: 121 nozzles for the control rod drive mechanism, 18 nozzles for the neutron temperature measurement channel tube bundle, 1 reactor exhaust nozzle and a spare exhaust nozzle. Among them, 103 control rod drive mechanism pressure shells and 18 blind plates are installed on 121 control rod drive mechanism connectors, and 18 neutron temperature measurement channel tube bundles are installed on 18 neutron temperature measurement channel tube bundles. These connecting pipes are equally divided into 6 areas, and each area is designed with a set of upper component leakage detection system to test the tightness of the connecting pipes. [0003] During the annual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/017G21C17/112
CPCG21C17/017G21C17/112Y02E30/30
Inventor 吴磊张建军高生华张范赵亚明尤晓波张宾刘明李高超易良川孙龙兰晓伟曾振华胡彬曹晔
Owner JIANGSU NUCLEAR POWER CORP