Enhancement of Severe Accident Code MAAP and Accident Progression Analysis for Fukushima Daiichi Nuclear Power Plant
藤井 正 Tadashi FUJII 酒井 健 Takeshi SAKAI 西田 浩二 Koji NISHIDA 小島 良洋 Yoshihiro KOJIMA 千原 瑠為 Rui CHIHARA 狩野 喜二 Yoshiji KARINO
Fuel debris distribution Fukushima Daiichi NPP MAAP code Severe Accident
As part of efforts to decommissioning of the Fukushima Daiichi nuclear power plants (NPP), model enhancement of severe accident analysis code “MAAP” and accident progression analyses for Fukushima Daiichi NPP have been conducted for preparation of fuel debris retrieval. The object of this study is estimation of reactor core and containment vessel status for decision of planning the debris retrieval method based on the accident progression analysis results. This report summarizes the model improvement of MAAP code and analysis results.