Reactor4 had one explosion and 2 fires in March 2011
Tepco published the in-house Fukushima accident investigation report on 6/20/2012.
In this report, which is assumed to downplay the accident, Tepco reported that there were 2 fires in reactor4 after the explosion, and those fires were naturally extinguished fortunately.
Also, it is stated that they could not approach SFP4 because the radiation level was too high.
Tepco is emphasizing the safety of SFP4 to say they can inject cooling water even when another aftershock hits Fukushima, but it suggests they won’t be able to reach SFP4 in case of another accident. (cf, Tepco has no clue for the worst senario of SFP4)
10:30AM Tepco tried to go to SFP4 to investigate the state but the radiation level inside of the reactor building was too high, they couldn’t enter. (The temperature of SFP4 was 84℃ at 4:08)
6:14 AM Major impulsive sound and vibration were observed, and they confirmed the roof of the reactor building was damaged.
9:38 AM Fire was observed at North West corder of the 3rd floor of the building, but they confirmed the fire was naturally extinguished at 11:00AM.
5:45AM Another fire was reported at the North West corner of the 4th floor of the building, but it was missing at 6:15AM.
This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.