原子力安全、社会と共に考える; リスク評価の活用方法とその例

For discussions with the public for the safety of nuclear power; Various patterns of risk application method and examples

成宮 祥介*; 宮野 廣*; 野口 和彦*; 村松 健*; 高田 孝  ; 牟田 仁*; 糸井 達也*; 松本 昌昭*; 松永 陽子*

Narumiya, Yoshiyuki*; Miyano, Hiroshi*; Noguchi, Kazuhiko*; Muramatsu, Ken*; Takata, Takashi; Muta, Hitoshi*; Itoi, Tatsuya*; Matsumoto, Masaaki*; Matsunaga, Yoko*

本発表では、原子力発電所の安全性の維持向上につながる種々の安全確保活動あるいはそれに関する規制行為について、リスク情報の活用にかかる方法、用いるリスク指標を考察する。具体的な例として、リスク活用の異議、活用先の分類を示し、実務と用いる指標、マネジメントの方法などを紹介する。

Target of PRA is not calculating PRA to get CDF/CFF, but providing significant and useful information from PRA results for risk-informed activities. Lot of risk applications have been implemented these about 20 years in US. After Fukushima Dai-ichi accidents, Japanese Nuclear Regulation Authority provided new regulatory requirements about external events and beyond design events. And Risk Application faces full-scale implementation. In this report, several methods of risk application are showed with adequate risk indexes. Two examples of risk application, risk-informed shutdown management and RI-ISI, are provided. The explanation about Risk Informed Decision-Making Process is made.