Extract a lesson from the Fukushima Daiichi Nuclear Power Plant Accident in the light of Safety-II; People perform an important role at the respond to a risk on an accident

Oba, Kyoko  ; Yoshizawa, Atsufumi*; Kitamura, Masaharu*

This study introduces the necessity of stepping up the concept from Safety-I, risk removal type of safety, to the Safety-II, which aims to enhance system flexibility and resilience. In order to achieve Safety-II, the Fukushima Daiichi Nuclear Power Plant accident was investigated by using Resilience Engineering, which is the methodology going toward Safety-II. Focusing on responding, which is one of the four cornerstones of Resilience Engineering, workers in the Fukushima Daiichi Nuclear Power Plants executed flexible ideas to prevent catastrophic damage of the accident. Those responding were created by human with strong attitude in which few investigation reports mentioned. Those approaches show the importance of the Safety-II concept and Resilience Engineering methodology.