Tepco’s been emphasizing the safety of contaminated water by measuring with incompatible dosimeters

Photo: Contaminated water storage tanks lined up in Fukushima nuclear plant area (1.2016) [Link


It was found out Tepco has repeatedly been emphasizing the safety of contaminated water by using dosimeters that cannot detect the radioactive tritium and that do not react to cesium unless the concentration level is extremely high.

Nature of the water to be discharged to the Pacific is the filtered highly-concentrated contaminated water generated by cooling the nuclear fuel that has melted down into the reactor at least twice, and is announced to contain only tritium. Tritium cannot be removed even with decontamination equipment.

However During the demonstration to the press, a dosimeter that detects only extremely high levels of gamma rays was applied to a bottle containing the contaminated water, which showed no detection. Since July 2020. TEPCO has been repeating this performance to about 1,300 groups and 15,000 people.



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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.


November 2022