High-energy pipeline local leakage monitoring test bed for nuclear power station

Abstract

The invention belongs to the technical field of measurement in nuke industry, and in particular relates to a high-energy pipeline local leakage monitoring test bed for a nuclear power station. A structure of the high-energy pipeline local leakage monitoring test bed comprises a high-energy medium generation device, wherein the high-energy medium generation device is connected with a testing pipeline through a technological pipeline, the testing pipeline is connected with a leakage rate measurement pipeline, the testing pipeline comprises a testing straight pipeline and a crack simulation test piece, the technological pipeline comprises a main technological pipeline and a temperature and humidity steam testing pipeline as a branch pipeline, the testing straight pipeline is connected with the main technological pipeline, the temperature and humidity steam testing pipeline respectively extends to the crack simulation test piece and the leakage rate measurement pipeline respectively, a plurality of waveguide rods are arranged on the testing straight pipeline, acoustic emission sensors are arranged on the waveguide rods and are connected with signal acquisition cards through cables. The test bed provided by the invention can be used for finishing leakage simulation tests of high-energy pipelines, as well as research and development, demarcating and overhaul of acoustic emission leakage monitoring systems and temperature and humidity leakage monitoring systems.

Description

technical field [0001] The invention belongs to the technical field of nuclear industry measurement, and in particular relates to a local leakage monitoring test bench of a high-energy pipeline in a nuclear power plant, which can be used for research and development, calibration and maintenance of a local leakage monitoring system. 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. The pre-break leakage technology is an advanced design technology to ensure the safety and reliability of the reactor operation. When the pipeline leaks and the leakage reaches a certain level, it can be measured by a special leakage monitoring device and the operating personnel will be notified. Before the crack expands to the critical size and breaks s...

AI Technical Summary

Problems solved by technology

According to the current research on related products at home and abroad, there is currently no mature product that can be directly applied to the quantitative measurement of specific high-energy pipeline leakage monitoring in nuclear power plants. Adaptive modification or product development is required, and accurate quantitative measurement of specific high-energy pipelines is required. The location of the leakage point needs to build a suitable test bench, and establish the conversion relationship between the leakage monitoring signal and the leakage rate and determine the correction coefficient through the bench test.

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