In the evening of 2/1/2012, Tepco admitted that the amount of water leakage was up to 8.5 tones, though they announced it was only 6L.
Because it contains 35,500 Bq/L, it means at least 301750000Bq of radiation has leaked.
At first they mentioned it in L, which is a unit for volume, and they changed it to tone, which is a unit for weight. Japanese people are confused by this random report of Tepco.
It leaked from a pipe (9mm diameter.) connected to a facility to measure the amount of water in reactor jet pomp. The pipe was completely taken off from the plug but the reason is not known yet. Tepco suspects it might be from frozen water inside of the pipes.
The leaked water didn’t flow out of the buildings but went into the basement floor of reactor 4.
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.