Neutron flux tube inspection integrated device

A flux and neutron technology, which is used in the field of integrated hydrostatic test and helium inspection of sub-flux tubes. simple effect

Pending Publication Date: 2020-05-01
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The neutron flux tube is the pressure boundary of the primary circuit, because the mechanical wear caused by radiation embrittlement and flow-induced vibration will make the tube wall thinner or even damaged, which will cause leakage and contamination of the primary circuit coolant

Method used

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  • Neutron flux tube inspection integrated device
  • Neutron flux tube inspection integrated device
  • Neutron flux tube inspection integrated device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0025] like figure 1 , figure 2 , image 3 As shown, a nuclear reactor neutron flux tube overall hydrostatic test and helium inspection integrated device, including: helium leak detector 1, helium leak detection connection device 4, sealing ball valve 8, neutron flux tube outer wall filling Helium device 9, water pressure booster pump 12, pressure gauge 13. The helium leak detector 1 and the helium leak detection connection device 4 are snap-connected by bellows, the neutron flux tube 6 is connected with the helium gas leak detection device 4, the handle end of which is fixed at the sealing section 7 of the middle body, and the middle body The sealing section 7 is connected with the sealing ball valve 8 by bolts; in the state of helium gas leak detection, the helium filling device 9 on the outer wall of the neutron flux tube is connected with the se...

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Abstract

The invention relates to the technical field of nuclear power station maintenance, in particular to an integrated device suitable for nuclear reactor neutron flux tube overall water pressure test andhelium inspection. After a neutron flux tube spare part is prepared, a leakage detection device is designed for the requirements of a water pressure test and a nondestructive test, and support is provided for quality inspection of the spare part. In the invention, a helium leakage detector is connected with a helium leakage detection connecting device through a corrugated pipe buckle, a neutron flux tube is connected with the helium leakage detection device, a handle end is fixed at a sealing section of a middle body, the sealing section of the middle body is connected with a sealing ball valve through a bolt; in a helium leakage detection state, the outer wall helium filling device of the neutron flux tube is connected with the sealing ball valve through a transverse stop valve, a pressure gauge is connected with the sealing ball valve through a vertical stop valve; and in a water pressure test state, a hydraulic booster pump is connected with the sealing ball valve through the transverse stop valve. The efficiency is improved, the cost is saved, and the purpose of leakage detection can be well achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant maintenance, in particular to an integrated device suitable for nuclear reactor neutron flux tube overall hydraulic test and helium inspection. Background technique [0002] Reactor neutron flux tubes in pressurized water reactor nuclear power plants, commonly known as bushings, are one of the key equipment in pressurized water reactor nuclear power plants. The number of neutron flux tubes varies with the size of the reactor. The number of sub-flux tubes is 20-50. As a measurement channel for the neutron flux of the core nuclear measurement system, the neutron flux tubes are evenly distributed in the channel of the core fuel assembly, run through the fuel assembly, and are exposed in the core. The neutron flux tube is the pressure boundary of the primary circuit, because the mechanical wear caused by radiation embrittlement and flow-induced vibration will make the tube wall thinner or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00
CPCG21C17/001G21C17/002Y02E30/30
Inventor 王成林罗飞华杜从波费志松袁建忠田亮袁佳陆少威倪燕飞赵永明
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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