An effective detection method based on the biological acoustic characteristics of the outlet of nuclear power plant

In order to improve the reliability of nuclear power plant cold source, it is necessary to establish a defense system in depth of marine biology, identification, detection, early warning and hierarchical response. Among them, detection and early warning is a front-end disposal measure, which can provide accurate and timely marine biological information for the follow-up hierarchical response. At the same time, it can replace the underwater inspection of divers and reduce the risk of industrial safety. In this paper, the underwater acoustic high-resolution multi beam detection method is used to detect marine creatures such as jellyfish, and its echo characteristics are obtained. The distribution density and body scattering intensity characteristics of jellyfish in sensitive sea areas are analyzed. The results show that the high-resolution multi beam acoustic method is effective for detecting marine creatures at the outlet of nuclear power plant.