基于互相关时差法的核电安全壳泄漏定位方法研究  

Nuclear Power Containment Leakage Location Method Based on Cross correlation Time Difference Method

作　　者：陈英瑜 李尚科 石宁波 张庆阳 张智新[3] 李刚 杨中华 綦磊[2] 肖庆生[2] 芮小博 CHEN Ying-yu;LI Shang-ke;SHI Ning-bo;ZHANG Qing-yang;ZHANG Zhi-xin;LI Gang;YANG Zhong-hua;QI Lei;XIAO Qing-sheng;RUI Xiao-bo(China Nuclear Power Operations Co.,Ltd.,Guangdong Shenzhen,518000,China;Beijing Institute of Spacecraft Environment Engineering,Beijing 100094,China;Tianjin University,Tianjin 300072,China)

机构地区：[1]中广核核电运营有限公司,广东深圳518000 [2]北京卫星环境工程研究所,北京100094 [3]天津大学,天津300072

出　　处：《装备环境工程》2023年第11期133-141,共9页Equipment Environmental Engineering

摘　　要：目的基于声发射检测原理,探究一种适用于核电安全壳的泄漏定位方法。方法首先,开展安全壳结构的声波传播特性研究;其次,基于时频分析,对安全壳泄漏产生的声信号进行滤波预处理,基于分布式传感网络,利用互相关系数曲线,估计不同传感器信号时延;最后,采用双曲线法,对泄漏源进行定位,得到定位观测点,对观测点进行离散系数加权,得到预测泄漏源位置。结果安全壳上波速平均值为3026.2 m/s,泄漏声信号的频带主要集中在15~80 kHz,没有明显的时域特征。采用该方法对模拟安全壳上的泄漏源进行定位,平均定位误差为4.31 cm。结论安全壳上周向和轴向的波速差异不大,可近似认为是各项同性的。基于离散系数加权的互相关时差法定位效果良好,满足安全壳结构泄漏定位需求。The work aims to explore a leak location method suitable for nuclear power containment based on the principle of acoustic emission detection.Firstly,the acoustic propagation characteristics of the containment structure were studied.Sec-ondly,based on time–frequency analysis,the acoustic signals generated by the containment leakage were filtered.Based on the distributed sensor network,the time delay of different sensor signals was estimated with the cross-correlation coefficient curve.Finally,the hyperbola method was used to locate the leakage source to obtain the location observation point,and the discrete coefficient weighting was used to obtain the predicted leakage source location.The average wave velocity on the containment vessel was 3026.2 m/s,and the frequency band of the leakage sound signal was mainly concentrated in the range of 15-80 kHz,without obvious time-domain characteristics.This method was used to locate the leakage source on the simulated containment vessel,the average location error was 4.31 cm.The difference in wave velocity between the circumferential and axial directions of the containment vessel is not significant,and can be approximated as isotropic.The cross correlation time difference method based on discrete coefficient weighting has good localization effect and meets the leakage localization requirements of the con-tainment structure.

关 键 词：声发射 安全壳 泄漏 互相关 离散系数 定位 

分 类 号：TM623[电气工程—电力系统及自动化]