Review of Accident at TEPCO's Fukushima's Nuclear Power Station and Proposed Countermeasures

Japan Nuclear Technology Institute has published a report of the Fukushima accident. Its summary is available here: http://www.gengikyo.jp/english/shokai/Tohoku_Jishin/summary.pdf
and the whole report is here: http://www.gengikyo.jp/english/shokai/Tohoku_Jishin/report.pdf