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IAEA International Fact Finding Expert Mission of the Fukushima Dai-ichi NPP Accident Following the Great East Japan Earthquake and Tsunami
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Report to the IAEA Member States
Tokyo, Fukushima Dai-ichi NPP, Fukushima Dai-ni NPP, and Tokai Dai-ni NPP, Japan
24 May - 2 June 2011
By agreement with the Government of Japan, the International Atomic Energy Agency
conducted a preliminary mission to find facts and identify initial lessons to be learned from
the accident at Fukushima Dai-ichi and share this information across the world nuclear
community. To this end, a team of experts undertook this Fact Finding Mission from 24 May
to 2 June 2011. The results of the Mission will be reported to the IAEA Ministerial
Conference on Nuclear Safety at IAEA headquarters in Vienna on 20 24 June 2011.
During the IAEA Mission, the team of nuclear experts received excellent cooperation from all
parties, receiving information from many relevant Japanese ministries, nuclear regulators and
operators. The Mission also visited three affected nuclear power plants (NPP) — Tokai Dai-
ni, Fukushima Dai-ni and Dai-ichi — to gain an appreciation of the status of the plants and
the scale of the damage. The facility visits allowed the experts to talk to the operator staff as
well as to view the on-going restoration and remediation work.
The Mission gathered evidence and undertook a preliminary assessment and has developed
preliminary conclusions as well as lessons to be learned. These preliminary conclusions and
lessons have been shared and discussed with Japanese experts and officials. They fall broadly
under the three specialist areas of external hazards, severe accident management and
emergency preparedness. They are of relevance to the Japanese nuclear community, the IAEA
and the worldwide nuclear community to learn lessons to improve nuclear safety.
The IAEA Mission urges the international nuclear community to consider the following 15
conclusions and 16 lessons in order to take advantage of the unique opportunity created by the
Fukushima accident to seek to learn and improve worldwide nuclear safety.
(Complete Report - 162 page Google Document)
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