Unmanned stationary online monitoring system based on buoy for marine gamma radioactivity. (January 2023)

• Record Type: Journal Article
• Authors: Song, Jinlin; Gong, Pin; Wang, Peng; Zhang, Jinzhao; Hu, Zhimeng; Zhou, Cheng; Zhu, Xiaoxiang; Wei, Qing; Zhou, Jian; Tang, Xiaobin
• Is Part Of: Applied radiation and isotopes. Volume 191(2023)
• Publication Date: 2023-01
• Subjects: Marine gamma radioactivity monitoring -- Unmanned online monitoring system -- Detection efficiency calibration -- Data collection and transmission; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2022.110528
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: Research on unmanned online monitoring equipment for marine radioactivity surrounding nuclear power plants is of great significance. In this work, a small radioactivity monitoring system based on buoy was designed and manufactured for the emergency situation of nuclear accidents. The core of the radioactivity monitoring system is the underwater gamma spectrometer. The spectrometer can respond to gamma rays from 60 keV to 3 MeV, and can identify the nuclides whose characteristic rays belong to this energy range. The detection efficiency curve was calculated through Monte Carlo simulation and verified in a standard liquid source. A data acquisition processor was also designed to coordinate the detectors in the system and wirelessly transmit online monitoring data. Three experiments were carried out in the seawater around the Tianwan Nuclear Power Plant in Lianyungang, China using this online marine radioactivity monitoring system based on buoys. The stability and radioactivity monitoring capabilities of the system have been verified. Highlights: The miniaturization and lightweight of the system are conducive to the rapid deployment for nuclear emergency response. The proposal of the marine radioactivity monitoring network can expand the area of real-time radioactivity monitoring at sea. A complete online monitoring system for marine radioactivity is described in detail. The online marine radioactivity monitoring system has been tested in the sea area around a nuclear power plant.