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原子力安全、社会と共に考える; リスクの顕在化の抑制

For discussions with the public for the safety of nuclear power; Applying risk information to prevention/mitigation of SA

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*

リスク情報は多くの多面的な要素を含んでおり、意思決定に至るまでのプロセスは、対象とするシステムと課題と目的に応じて様々な複雑さをみせる。ここでは、原子力発電所を対象に、潜在していたリスクが顕在化することへの備えを実例(TMI, チェルノブイリ, 東京電力福島第一発電所事項)を引きながら解説し、システムの信頼性との関係を分析する。

In order to grasp efficiency of risk information, we tried to apply an insight of PRA to considering of severe accidents; TMI, Chernobyl, and Fukushima Dai-ichi. Based on this analysis, three points are disclosed. At first, PRA can product adequate countermeasures for low-likelihood events; huge earthquake or Tsunami. Next, PRA can prove weak points in design or operation reasonably. Third point is safety culture. PRA and safety culture are seemed to be connected deeply. These analyses revealed PRA is one of the most efficient and systematic risk analysis methods to prevent/mitigate severe accidents.

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