Experimental tests of an in-situ oceanic radiation monitoring prototype system

Abstract

Importance of daily radiation monitoring system has been emphasized in terms of radiation protection because of growing number of nuclear power plants in the neighbor countries and existing potential hazard of nuclear reactor accidents involving radiation leakage. For the fast and accurate periodic radiation monitoring, the on-site radiation detection is essential. We developed a prototype system of unmanned surface vehicle (USV) carrying radiation sensor (CsI(Tl) crystal + PIN diode) to measure real-time oceanic radiation level of desired regions from coast to deep sea. In this study, we experimented the detectability of the system and compared the results with simulation data. We targeted on detecting 662 keV gamma ray emitted by 137Cs, which is a major fission product.lving radiation leakage. For the fast and accurate periodic radiation monitoring, the on-site radiation detection is essential. We developed a prototype system of unmanned surface vehicle (USV) carrying radiation sensor (CsI(Tl) crystal + PIN diode) to measure real-time oceanic radiation level of desired regions from coast to deep sea. In this study, we experimented the detectability of the system and compared the results with simulation data. We targeted on detecting 662 keV gamma ray emitted by 137Cs, which is a major fission product.