7 million Bq of all β nuclides leaked as contaminated water in Fukushima plant

According to Tepco, highly contaminated water leaked from a water storage tank on 6/26/2016.

All β nuclides density is reportedly 96,000,000 Bq/m3. Cs-134/137 density is also 700,000 Bq/m3.

Tepco states the leaked volume was 72 L. Based on their announcement, at least 6,912,000 Bq of all β nuclides leaked to contain Sr-90.

Tepco says no contaminated water spread to the outside of the tank area.


The type of this tank has unwelded joint parts, which is vulnerable for leakage.

The life of these tanks was reported to be 5 years but in 2013 Tepco admitted it has no basis.

These tanks are not bearable for the contaminated water but these are still in use.









Français :

Fuite de 7 millions de Bq de radioactivité β d’eaux contaminées à la centrale de Fukushima


Selon Tepco, le 26 juin 2016 de l’eau extrêmement radioactive a fuit d’une citerne de stockage.

La radioactivité β est dite de 96 000 000 Bq/m³. La radioactivité en Cs 134/137 est de 700 000 Bq/m³.
Tepco affirme que le volume de la fuite est de 72 L. Sur la base de leurs communiqué, il y a eu au moins 6 912 000 Bq de radioactivité β, dont du Sr 90, dans cette fuite.
Tepco affirme qu’aucune eau extrêmement radioactive n’est sortie de la zone de la citerne.

Le type de cette citerne est sans soudure, ce qui les rend vulnérables à ce type de fuite.
La durée de vie de ces citernes était affirmé être de 5 ans mais en 2013 Tepco a reconnu que cette affirmation est infondée.
Ces citernes ne conviennent pas pour le stockage des eaux extrêmement radioactives mais elles sont toujours en place.


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.


June 2016