ABSTRACT
On February 9, 1991, an accident occurred at KEPCO’s Mihama nuclear power station, Unit 2, which resulted in the first-ever activation of an emergency core cooling system (ECCS) in Japan. Although a small amount of radioactive material was released to the external environment, the overall impact was negligible. However, the public media in general expressed serious concern about the possibility of nuclear disaster because they believed that the activation of the ECCS could have led to a
Introduction .............................................................................................................. 19 Outline of the Accident ............................................................................................20 Lessons Learned from the Accident and Measures Implemented to Prevent Recurrence ..............................................................................................25
