TEPCO - Fukushima Nuclear Accident Analysis Report (Summary) - June 20, 2012

Tokyo Electric Power Company, Inc. - June 20, 2012

This report supplements the December 2011 Interim Report with the addition of investigations and examinations carried out after the release of the Interim Report, from the following three perspectives:

In addition to the issues concerning and measures taken in regard to the facilities as written in the Interim Report, issues concerning and measures taken in regard to operations have also been added;

Items for which investigations had not yet been completed at the time of the release of the Interim Report have been added; and

Further investigation was conducted on the issues in question and added to the report.

・In this report, TEPCO has made an effort to learn from what it experienced as a party to this accident and from the compiled data, and has summarized the manifestation of the facts investigated, the causes leading to core damage, and measures for prevention. These will steadily be applied to the nuclear power stations it owns.

・The investigation of the condition of equipment inside the PCV of Fukushima Daiichi Units 1 to 3 is limited, and neither all aspects nor the degree of the damage is known at this time, but as further findings are identified, TEPCO will make efforts to collect and share them widely.

TEPCO - Fukushima Nuclear Accident Analysis Report (Summary) - June 20, 2012 (58 page .PDF file)
http://www.tepco.co.jp/en/press/corp-com/release/betu12_e/images/120620e0102.pdf

Per TEPCO:
*English translations of the reports and the appendixes are now being developed and it takes a while to complete them.
We will post the translations one by one when it is prepared.
(The documents written in Japanese below will be replaced by English translations.)
We apologize for this inconvenience caused.

TEPCO - Links to:  Fukushima Nuclear Accidents Investigation Reports
http://www.tepco.co.jp/en/press/corp-com/release/2012/1205638_1870.html