Coolant system stopped at reactor 4 again, back-up turned on




Tepco reported an alarm sounded for secondary cooling water pump at 20:00 6/4/2012, the pump automatically stopped.
They found burn marks on the terminal of the pump’s cable to the motor. The reason is not verified yet.
Back-up pump was turned on 25 minutes later. They report the temperature of SFP4 did not increase significantly.

福島第1原発4号機プールでポンプ停止 温度に変化なし
2012.6.5 11:48



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.