1/31/2012, 10:30PM, Tepco employee found water leakage from the test line of jet pump calculation rack located on the first floor of reactor 4.
10:43 PM, they stopped it by turning off the tap connected to the rack. The floor is full of the debris. As long as they confirmed, more than 6L of water leaked. None of it leaked to the outside of the reactor building.
From the result of the measurement, it was contaminated as 35.5 Bq/cm3 (= 35,500 Bq/L), they assume the water is from the well of the reactor. (Cf. The measurement data of the well of reactor was 39 Bq/cm3 on 12/8/2012.)
They are going to explain it on the press conference of 2/1/2012 11:00AM.
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.