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| Nuclear Power Containment Leakage Location Method Based on Cross correlation Time Difference Method |
| Received:June 12, 2023 Revised:September 06, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.11.017 |
| KeyWord:acoustic emission containment leakage cross-correlation discrete coefficient location |
| Author | Institution |
| CHEN Ying-yu |
China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, , China |
| LI Shang-ke |
China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, , China |
| SHI Ning-bo |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| ZHANG Qing-yang |
Tianjin University, Tianjin , China |
| ZHANG Zhi-xin |
Tianjin University, Tianjin , China |
| LI Gang |
China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, , China |
| YANG Zhong-hua |
China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, , China |
| QI Lei |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| XIAO Qing-sheng |
Beijing Institute of Spacecraft Environment Engineering, Beijing , China |
| RUI Xiao-bo |
Tianjin University, Tianjin , China |
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| Abstract: |
| 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. Secondly, 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 3 026.2 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 containment structure. |
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