Cooling system of reactor2 stopped for 5 hours


Tepco sent emergency mail to the journalist.
Japanese comedian/journalist Oshidori tweeted the messages.
It tells, Tepco had to stop the water cooling system of SFP at reactor2 because of alarm but they couldn’t detect the troubled place. They ended up restarting it without knowing why it alarmed.

@makomelo Source


2/18/2012 19:05, cooling system of reactor2’s SFP alerted the overflow of primary coolant system and automatically stopped.


Tepco confirmed there was no water leakage and the temperature of SFP was 12.4℃, increased at 0.27℃/h. They couldn’t find any problem.


Because there was the risk of primary coolant system to be frozen as the temperature went down outside, Tepco lifted the alert and restarted the system at 23:54.

【速報】4)・なお、起動に当たり、設備の漏えいの有無、パラメータなどを確認した結果、異常は確認しなかったが、引き続き、異常がないことを確認してい く。

Tepco couldn’t find an error of plant parameter data.

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.


February 2012