A tweet by a Lower House Councilman Hiroshi Kawauchi (DPJ) says the Nuclear and Industrial Safety Agency now admits in its report that the Reactor Pressure Vessel may have been broken by the EARTHQUAKE, not tsunami. No info about which reactor.
Independent journalist Ryuichi Kino says whatever this document is, it is not yet uploaded to the NISA's site. I've checked the METI (Ministry of Economy, Trade and Industry) press release page, and there is none so far.
Councilman Kawauchi's tweet from December 9, 2011:
Document from the Nuclear and Industrial Safety Agency. It reads "a minute damage inside the reactor from the earthquake cannot be denied". It is just surprising to me that they can call a damage that caused the loss of coolant [water] at 7 tonnes per hour "minute", but anyway they have admitted to the possibility of a damage inside the reactor.
Now, what would this mean? A curious article comes to mind. France's Le Monde reported on December 7 that the government's committee investigating the accident is about to release its interim report, and the report is going to say it is the earthquake, not tsunami as TEPCO and the government has so far insisted, that caused the damage that led to the accident. (I read Le Monde's article in the Japanese translation summary on this blog, but the original seems to be this - you have to be a subscriber of Le Monde to read it, apparently.)
Another valiant attempt by NISA to cover its behind is my guess.