[Emergency] Coolant system of reactor 4 stopped

14:44  4/12/2012, Coolant system of reactor 4 stopped. If you are in Japan, please prepare for evacuating just in case.

Emergency mail from Tepco

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4/12 14:44, alarm of water leakage from heat exchanger unit was given out, coolant system of the SFP of reactor 4 was automatically stopped.

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At the moment, Tepco is trying to check the leakage point of the coolant system. Now the temperature of SFP is 28℃, it increases at 0.5℃/h.

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(Tweet of Ms. Tanioka, a member of the House of Councilors from The Democratic Party of Japan)

At 19:00, the cooling system of SFP in reactor 4 is not back on. The temperature is about 29℃. Information from The Nuclear Agency.

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From the explanation of The Nuclear Agency, the temperature increases at a linear manner, at 0.5℃/h. It is not know how much water is leaking. There are 70hours until it goes up to 65℃ (=maintenance code).

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About this site

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.

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