Breach simulation method for high energy pipeline leakage monitoring test in nuclear power plant

Abstract

The invention relates to a method for leakage source break simulation in a high energy pipe leakage monitoring experiment of a nuclear power station. Under the condition that the simulated pipe size can allow direct processing of a break, the break is directly preset in an experimental straight pipe, under the action of pressure difference between inside and outside of the pipe, a medium directly leaks from the preset break in the pipe wall and triggers a sound emission signal; under the condition that the simulated pipe size is difficult for direct processing of the break, an expansion hole is formed in the pipe wall of the experimental straight pipe, and an expansion groove surrounding the expansion hole is formed in the external wall of the experimental straight pipe, the other end of the expansion groove is provided with a leakage break simulation test piece, under the action of pressure difference between inside and outside of the pipe, the medium expands to the expansion groove through the expansion hole in the pipe wall, and then, the medium leaks from the break preset in the leakage break simulation test piece and triggers the sound emission signal. According to the method, the problem of leakage break simulation of the high energy pipe leakage monitoring experiment rig of the nuclear power station is solved, and a foundation for the high energy pipe leakage monitoring experiment is laid.

Description

technical field [0001] The invention belongs to the field of simulation test research in the nuclear industry, and in particular relates to a method for simulating a leak source breach in a high-energy pipeline leakage monitoring test of a nuclear power plant, which can be applied to a high-energy pipeline leakage monitoring test bench of the nuclear power plant. Background technique [0002] After the Fukushima accident in Japan, higher requirements were put forward for the safety and reliability of nuclear power plants, especially the leakage monitoring of high-energy pipelines related to nuclear safety, requiring the use of leak-before-break technology. [0003] In the design of nuclear power plants that have been built in the past, conventional methods such as pit liquid level and water filling balance are used to monitor the leakage of high-energy pipeline media. The overall monitoring time of these monitoring methods is long, and it is impossible to locate unidentifiabl...

AI Technical Summary

Problems solved by technology

If the real pipeline cracks are to be fully simulated, the requirements of the above-mentioned factors must be met, which puts high demands on processing, cost, and cycle time, especially for the complete simulation of large pipeline leakage breaches, which may be unfeasible in engineering

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