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Perspectives on severe accident research in Japan after accident at Fukushima Daiichi nuclear power station   SUGIMOTO Jun1   1. Academy for Global Nuclear Safety and Security Agent, Tokyo Institute of Technology 2-12-1 N1-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan   Abstract: After the Fukushima Daiichi accidentin March 2011 several investigation committees in Japan issued reports with lessons learned from the accident, in which some recommendations on severe accident research are included. In response to the recommendation in investigation report by Atomic Energy Society of Japan (AESJ), the review of specific severe accident research issues was started in AESJ.In 2015 AESJ has developed a new Thermal-Hydraulics Safety Evaluation Fundamental Technology Enhancement Strategy Roadmap (TH-RM) for Light Water Reactor (LWR) safety improvement and development based on the lessons learned from Fukushima accident. At the same time, Research Expert Committee on Evaluation of Severe Accident established in AESJ, has published Phenomena Identification and Ranking Tables (PIRTs) for both thermal-hydraulic and source term issues in severe accident based on findings from Fukushima accident. The present paper describes the lessons learned on severe accident research from Fukushimaaccident, severe accidentresearch issues reviewed in AESJ, several examples of the current severe accidentresearch activities mostly based on this review and some concluding remarks. Keywords: severe accident research;Fukushima Daiichi; lessons learned from Fukushima accident; MAAP
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