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原子力研究施設等の事故・故障等に適用した根本原因分析手法

Root cause analysis method applied to accidents and troubles of nuclear research facilities

佐藤 猛; 渡邉 憲夫; 吉田 一雄

Sato, Takeshi; Watanabe, Norio; Yoshida, Kazuo

事故・故障等から得られる教訓,知見などは、原子力施設の安全管理に活かすことの重要性は幅広く認識されており、事故・故障等の根本的な原因分析により、原子力施設の安全に関する教訓,知見などを導き出してきている。日本原子力研究開発機構では、1990年頃から研究所で起こった一般施設を含む原子力研究施設等の事故・故障等を対象に根本原因分析を行ってきた。分析では多種多様な原子力施設を対象にしているため、誰でも活用できる分析法の確立を目指し、独自の分析方法を整備するとともに既存の分析法を活用してきた。本報告書では、これらの根本原因分析手法について紹介するとともに、JCO臨界事故を対象にそれぞれの分析法を適用し、使用法を解説する。

The importance to make use of lessons learned and knowledge from accidents and troubles in safety management of nuclear research facilities is recognized widely. By the root cause analysis of accidents and troubles, lessons learned and knowledge have been arrived about safety management of facilities. The root cause analysis has been performed for accidents and troubles generated at nuclear research facilities in Japan Atomic Energy Agency (JAEA) from about 1990. Because the analysis is performed for various facilities, anyone have been used the analysis method of possible of utilize. On this account the analysis method has been developed and adopted an existing analysis method. This report introduces the analysis method that has been used for the root cause analysis of these accidents and troubles. Furthermore, this report apply a generally well known JCO Criticality Accident to each analysis method as an example and explain on the direction for uses.

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