小波变换在快堆蒸汽发生器声学泄漏检测中的应用

Application of Wavelet Transform on Acoustic Leak Detection for Steam Generators in Liquid Metal Fast Breeder Reactor

根据在清华大学液态金属实验室实验钠回路上得到的实验数据,采用基于小波变换的奇异性检测理论进行快堆蒸汽发生器水/水蒸气泄漏的故障诊断研究。结果表明:此方法使得声学泄漏探测系统的灵敏度得到了提高,且对泄漏发生时间的定位十分准确,是快堆蒸汽发生器水/水蒸气泄漏检测的有效方法。

A method detecting water/steam leaks of steam generators in liquid metal fast breeder reactor (LMFBR) was described, which was based on the principle of singularity detection of wavelet transform according to the data from the acoustic leak detection system of sodium loop in the liquid metal lab of Tsinghua University. The methods are proved to be effective to improve the sensibility of acoustic leak detection system and detect the time of leaks correctly.