Comprehensive Nuclear Security Strategies for Nuclear Power Plants in Japan Based on the Lessons Learned from the Fukushima Accident and IAEA Recommendations

摘要

After the Fukushima accident, Japan has improved and strengthened not only safety design but alsornnuclear security strategies for nuclear power plants (NPPs) to achieve our former prime minister’s statement,rn“The importance of preparing for unanticipated risks” [1]. In regard to nuclear security for NPPs, the Fukushimarnaccident revealed to us that, in addition to earthquakes and tsunamis, terrorist attacks could also trigger similarrnsevere accidents if adequate nuclear security measures for the NNPs were not prepared. To accomplish our goal,rncomprehensive nuclear strategies have been carefully developed base on the lessons learned from thernFukushima accident and the following key concepts from IAEA recommendation document: “safety andrnsecurity harmonization (effective integration)”, “defense in depth”, “risk-based approach”, and “mitigation andrnminimization of radiological consequence”.