Tritium density reached the highest level at 3 bypass wells

From Tepco’s report published on 2/18 and 2/21/2015, Tritium density reached the highest level at 3 of 12 bypass wells almost at once.

The sampling dates were 2/16 and 2/19/2015.


The contaminated groundwater pumped up from these wells are to be discharged to the Pacific.


These wells are located in the south of the rest of the wells and next to each other. It suggests the groundwater contaminated by Tritium is forming an underground stream.

The readings were 120,000 Bq/m3, 810,000 Bq/m3, and 860,000 Bq/m3. Each of them was the highest reading measured in each bypass well.




Français :

La radioactivité en tritium passe des records dans 3 puits de dérivation


Selon deux rapports de Tepco publiés les 18 et 21 février 2015, la radioactivité en tritium a atteint un record dans 3 des 12 forages de dérivation en même temps.

Les échantillons sont des 16 et 19 février 2015.

Les eaux souterraines pompées de ces puits seront déversées dans le Pacifique.

Ces puits sont les plus au sud de ces forages et voisins entre eux. Ceci suggère que les eaux souterraines extrêmement radioactives en tritium forment un cours d’eau souterrain.
Les relevés sont de 120 000, 810 000 et 860 000 Bq/m³. Chacun constitue le record pour chacun de ces puits.

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 2015