Acousto-optic leakage monitoring system for nuclear power plant main steam pipeline

Abstract

The invention aims to discloses an acousto-optic leakage monitoring system for a nuclear power plant main steam pipeline. The acousto-optic leakage monitoring system comprises an acoustic-emission leakage monitoring loop and a spectrum leakage monitoring loop and is characterized in that the signal input end of the acoustic-emission leakage monitoring loop and the signal input end of the spectrumleakage monitoring loop are arranged at the sensing points of the main steam pipeline, the signal output end of the acoustic-emission leakage monitoring loop and the signal output end of the spectrumleakage monitoring loop are in communication connection with a network switch, and a control unit and a display unit are sequentially connected to the network switch. Compared with the prior art, theacousto-optic leakage monitoring system has the advantages that by combining acoustic emission and spectroscopy, pre-warning before main steam pipeline leakage can be achieved, the diversity and redundancy of the leakage monitoring method of the main steam pipeline are achieved, and credible monitoring results are achieved; the system is high in monitoring sensitivity, fast in response, capable ofevidently increasing reaction speed after leakage is discovered and capable of providing large safety allowance.

Description

technical field [0001] The invention relates to a leakage monitoring system, in particular to a main steam pipeline leakage monitoring system based on combination of sound and light. Background technique [0002] The application of the LBB (Leak Before Break) criterion for the main steam pipeline in the design of nuclear power plants requires the nuclear power plant to have a high pipeline leakage monitoring capability. Using the leakage monitoring system, the leakage of the pipeline can be found in a timely and effective manner, and there is enough time to take corresponding treatment measures, so as to avoid the further expansion of the pipeline crack and cause a large breach. The main steam pipeline leakage monitoring requires the ability to locate and quantify. [0003] At present, the main steam pipeline leakage monitoring technology commonly used in the design of nuclear power plants, such as containment pit liquid level measurement, has a long response time and poor p...

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Problems solved by technology

[0003] At present, the main steam pipeline leakage monitoring technology commonly used in the design of nuclear power plants, such as containment pit liquid level measurement, has a long response time and poor positioning and quantitative accuracy. Therefore, it is necessary to increase leakage on the main steam pipeline using LBB technology Monitoring system to meet the requirements of LBB and realize the diversity of monitoring methods

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