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非公式業務引継ぎと役割/権限認知; JCO臨界事故の原因/背景分析

Unofficial duty handing over and authority cognition; Cause analysis of JCO criticality accident

田辺 文也

Tanabe, Fumiya

JCO臨界事故の原因を構成する事柄として、製品溶液均一化作業手順の貯塔使用から沈殿槽使用への変更に対して計画グループ主任が許可を与えたことがある。スペシャルクルー(SC)副長がこの許可を求める役割と権限を有すると計画グループ主任が認知するうえで、SC主任退職時(1998年3月)の非公式引継ぎが重要な影響を及ぼしたと考えられる。

One of the major causes of JCO criticality accident is that the change of procedure of homogenization of product solution from the storage tank into the precipitation tank was permitted by the manager of planning group. Unofficial duty handing over by the retiring manager of the special crew (SC) influenced significantly the foreman's cognition that the SC foreman had the role and authority to ask the permission.

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