Coupled analysis of ocean-atmosphere interaction using A2CDOSE and SCHISM for radioactive dispersion following a north pacific nuclear incident

Abstract The Fukushima disaster highlighted the critical importance of a comprehensive emergency response plan for severe nuclear power plant (NPP) accidents. In response to this need, Taiwan’s National Atomic Research Institute (NARI) collaborated with the Central Weather Administration (CWA) to develop an urgent radiological dose evaluation system known as “A2CDOSE.” This system is designed to assess projected radiation doses over eight days following a nuclear incident, aiding in informed decision-making. Considering enhancing the multi-consequence analysis via nuclear material transport, this study connects the settings of ocean radiation contribution in series to develop a multi-sequence, multi-batch method called the ocean-atmosphere coupled analysis of radioactive substances with ocean dispersion code SCHISM. This Year’s (2024) hypothetical cesium-137 release case from the nuclear power plant was used to conduct a technical feasibility test. This method can serve as a reference for evaluating the optimal radiation detection routes for the affected maritime areas during future nuclear safety events, simulating the short-to mid-term effects of radioactive substance releases.