Executive Summary of the Interim Report Investigation Committee on the Accidents at Fukushima Nuclear Power Stations of Tokyo Electric Power Company, December 26, 2011 [Emphasis Added]:
[...] Units 1 to 3 appeared to have automatically scrammed at the Earthquake, but external power supplies and almost all in-house AC power supplies were lost due to the Earthquake and the Tsunami. [...]
Explosions occurred on Units 1, 3 and 4, which were caused presumably by the hydrogen released from the possible core damage and filled in the reactor buildings. The reactor core of Unit 2 also seems to have been damaged, although the investigation is still incomplete. [...]
In the wake of the Accidents, quite a few cases were observed where the manner of providing information by the government gave rise questions and doubt on the part of the populations in the surrounding areas who were forced to evacuate and people in the whole nation that the government was not providing truth promptly and accurately. Such examples included, among others, the status of the reactor cores (core meltdowns, in particular), the critical conditions of Unit 3, and explanations on radiation effects on health such as “No immediate impacts on human health”, which was difficult to understand.
The following tendency was observed: transmission and public announcement of information on urgent matter was delayed, press releases were withheld, and explanations were kept ambiguous.
Download the report .pdf here
Published: December 30th, 2011 at 11:27 am ET
- *UPDATE* Mainichi: Reactors No. 1 and 2 have holes up to 50 square CENTImeters, analysis says — Biggest hurdle now is filling with water — “Caused by hydrogen explosions” — Half million pounds of highly radioactive fuel inside reactors 1-3 December 9, 2011
- Nihon TV: Japan prof. says the explosions at Reactors No. 1 & 3 may have damaged suppression chambers — “Saturated steam that contains fission products” was apparently observed escaping December 8, 2011
- Tepco Official on Unit 3: “We don’t know if it was really a hydrogen explosion” August 8, 2012
- Expert: I think plutonium probably reached critical mass at Reactor 3 which caused explosion (VIDEO) September 6, 2012
- “Recriticality? Possibility of recriticality?! IAEA report: a meltdown at Fukushima unit 3?” (JAPAN TV) May 19, 2011