The Magnitude 9 Great East Japan Earthquake on March 11, 2011, followed by a massive tsunami struck TEPCO s Fukushima Daiichi Nuclear Power Station and triggered an unprecedented core melt/severe accident in Units 1 3. The radioactivity release led to the evacuation of local residents, many of whom still have not been able to return to their homes.

As a group of nuclear experts, the Atomic Energy Society of Japan established the Investigation Committee on the Nuclear Accident at the Fukushima Daiichi Nuclear Power Station, to investigate and analyze the accident from scientific and...