Online leakage monitoring system for main steam pipeline in nuclear power plant

Abstract

The invention discloses an online leakage monitoring system for a main steam pipeline in a nuclear power plant. The online leakage monitoring system comprises a leakage detecting and positioning sub-system 1 and a steam leakage rate measuring sub-system 2, wherein the leakage detecting and positioning sub-system 1 comprises a first host computer 11, a sensing optical cable 12, a display 13 and an alarm 14; the steam leakage rate measuring sub-system 2 comprises a second host computer 21, a shell tube 22, a condensation device 23 and a liquid collecting and measuring device 24; in case of steam leakage, the steam leakage and the leakage position can be detected by the sensing optical cable 12, an alarm can be made by the alarm 14, and at the same time the condensing device 23 and the liquid collection and measuring device 24 are powered on to cool leaked steam and calculate the leakage amount and the leakage rate. The online leakage monitoring system is relatively high in detection rate, leaking points can be precisely positioned, the purposes of real-time online micro-leakage monitoring and automatic alarm are achieved, and moreover the leakage amount and the leakage rate can be calculated.

Description

technical field [0001] The invention relates to the field of steam leakage and detection, in particular to an on-line detection system for main steam pipeline leakage of a nuclear power plant. Background technique [0002] A few days ago, nuclear reactor technology is becoming more and more mature, and nuclear power has become an indispensable part of power supply. In the development process of nuclear reactors, its safety and reliability issues are the most important. In particular, the consequences of mass explosion are very serious. Irwin et al. proposed the LBB (LeakBeforeBreak) technology in the 1960s, which means that surface cracks penetrate the wall thickness and the contained fluid leaks, but there is still enough margin in the direction of the wall thickness for inspection and timely shutdown or The pipeline is repaired and replaced to avoid catastrophic accidents caused by rapid overall damage. Due to the practicability of LBB technology, its application scope is...

AI Technical Summary

Problems solved by technology

Due to the practicability of LBB technology, its application scope is becoming wider and wider. However, there is no actual engineering application of LBB technology in the main steam pipeline in China at present.

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