Method and system for temperature and humidity monitoring of high-energy pipeline subject to medium leakage in nuclear power plant

Abstract

The invention belongs to the technical field of a measurement technique in a nuclear industry, and particularly relates to a method and a system for temperature and humidity monitoring of a high-energy pipeline subject to medium leakage in a nuclear power plant. According to the method, a plurality of temperature probes and humidity probes are added on a transmission channel between the wall of the high-energy pipeline and an insulating layer and are used for measuring changes of the absolute humidity in a channel subject to medium leakage, and the leakage position is identified according to relationships of differences of the time for different probes to receive humidity increase signals; the humidity increase is converted into the overall medium increase in the overall channel after being recorded by the humidity probes, and the leakage rate is calculated through dividing the overall medium increase by the cumulative time; the size of a leakage source is estimated through dividing the volumetric leakage rate of an actual leakage place by the leakage rate based on thermal calculation; and auxiliary judgment of pipelines leakage and leakage positions is performed by the temperature probes according to temperature rise. Risks of breakage of two ends of the high-energy pipeline can be avoided, certain unnecessary facilities can be eliminated, and the complexity and construction cost of a nuclear reactor structure can be reduced.

Description

technical field [0001] The invention belongs to the technical field of nuclear industry measurement, and in particular relates to a temperature and humidity monitoring method and a monitoring system for medium leakage of high-energy pipelines in nuclear power plants. Background technique [0002] Leakage before failure technology is an advanced design technology to ensure the safety and reliability of reactor operation. The basic idea is that when the pipeline leaks and the leakage reaches a certain level, it can be measured by a special leakage monitoring device and notified to the operator. Therefore, before the pipeline crack expands to a critical crack size and suddenly breaks, there is sufficient time to realize Shut down the reactor safely, and repair or replace the leaking pipeline to avoid double-end breakage of the pipeline. [0003] In the design of nuclear power plants that have been built in the past, conventional methods such as pit liquid level and water filli...

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Problems solved by technology

This method is costly and can only passively limit accidents when extreme working conditions occ

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