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Overview and outcomes of the OECD/NEA benchmark study of the accident at the Fukushima Daiichi NPS (BSAF), Phase 2; Results of severe accident analyses for Unit 2

OECD/NEA福島第一原子力発電所事故に関するベンチマーク研究(BSAF)フェーズ2の概要とその成果; 2号機のシビアアクシデント解析結果

Sonnenkalb, M.*; Pellegrini, M.*; Herranz, L. E.*; Lind, T.*; Morreale, A. C.*; 神田 憲一*; 玉置 等史; Kim, S. I.*; Cousin, F.*; Fernandez Moguel, L.*; Andrews, N.*; Sevon, T.*

Sonnenkalb, M.*; Pellegrini, M.*; Herranz, L. E.*; Lind, T.*; Morreale, A. C.*; Kanda, Kenichi*; Tamaki, Hitoshi; Kim, S. I.*; Cousin, F.*; Fernandez Moguel, L.*; Andrews, N.*; Sevon, T.*

OECD/NEAプロジェクト"福島第一原子力発電所事故に関するベンチマーク研究"のフェーズ2において、6か国9組織が異なるシビアアクシデント解析コードを用いて2号機の事故解析を行った。本報告では、参加機関の2号機の解析結果やプラントデータとの比較から得られた知見、事故進展の評価及び最終的な原子炉内の状態について述べる。特に原子炉圧力容器の状態、溶融炉心の放出及びFP挙動及び放出について焦点を当てる。また、2号機特有の事柄に焦点を当て、不確かさや必要となるデータも含めコンセンサスを得た点についてまとめる。

This is the second paper in a series of 3 in which results of severe accident analyses for Unit 2 of Fukushima Daiichi are presented, gained in Phase 2 of the OECD/NEA project "Benchmark Study of the Accident at the Fukushima Daiichi Nuclear Power Plant (BSAF)". Nine organizations of six countries submitted results of their calculated severe accident scenarios for Unit 2 of Fukushima Daiichi using different severe accident codes. The present paper describes the findings of the comparison of the participants' results for Unit 2 against each other and against plant data, the evaluation of the accident progression and the final status inside the reactors. Special focus is on reactor pressure vessel status, melt release and fission product behavior and release. Unit 2 specific aspects will be highlighted and points of consensus as well as remaining uncertainties and data needs will be summarized.

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パーセンタイル:100

分野:Nuclear Science & Technology

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