2007-09-10 報道・発表まとめ

• 安全委、定例会議
• IAEA 定例理事会開幕、事務局長が声明
• 他のプレスリリース
• 朝日連載記事、「原発震災」

The team’s review supported the Japanese conclusions: (1) that plant safety features had performed as required during the event, including the automatic shutdown of the reactor; (2) that the amount of radioactivity released was very small and well below the authorized limits for public health and environmental safety; and (3) that damage from the earthquake appeared to be limited to those sections of the plant that would not affect the reactor or systems related to reactor safety. The earthquake significantly exceeded the level of seismic activity for which the plant was designed. However, as with most nuclear plants, additional robustness had been incorporated into the plant design, which likely accounted for the damage being less than could have otherwise been expected. I should point out that the observations and conclusions relating to the behaviour of the plant structures, systems and components still require validation through the ongoing investigations.

The mission’s preliminary findings and the Japanese analyses of the event include important lessons learned — both positive and negative — that will be relevant to other nuclear plants worldwide. The public response to the team’s findings also plainly illustrates the importance and value of transparency and international collaboration in response to such events.