Study on Improving Safety by Applying Safety-II Concept Based on Analysis of Accident Response for Fukushima Daiichi Nuclear Power Plant

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  • 福島第一原子力発電所事故対応の分析に基づいたSafety-IIの概念活用による安全性向上のための研究
  • フクシマ ダイイチ ゲンシリョク ハツデンショ ジコ タイオウ ノ ブンセキ ニ モトズイタ Safety-Ⅱ ノ ガイネン カツヨウ ニ ヨル アンゼン セイコウ ジョウ ノ タメ ノ ケンキュウ

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Abstract

<p>The two approaches as the concepts to ensure safety of the complicated socio-technical systems have been proposed by Hollnagel. They are the safety concepts called “Safety-I” to reduce risks and “Safety-II” to expand successes. The resilience engineering is suggested as the methodology to achieve Safety-II. The study analyzes the recovery of the water injection of Unit 3 based on the resilience engineering, focusing on the fact that Fukushima Daiichi Nuclear Power Plant prevented further deterioration of the accident case, rather than the aspect that it has been evaluated for extracting risk factors. Based on those results, the study clarifies the method of learning to enhance safety which has a different view from existing accident investigation.</p>

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