Radioactive contamination level jumped over 57 times outside of underground wall

Cs-134/137 and all β nuclides (including Sr-90) density showed the rapid increase in groundwater, according to Tepco.

The sample was taken in the seaside of Reactor 2. Sampling date was 1/12/2015.

Compared to the previous measurement of 1/8/2015, Cs-134/137 density rose up by 57 times, all β nuclides density also rose up by 57 times.

This is the highest reading measured from this boring.

Tepco hasn’t identified the reason. This boring is located outside of the underground wall to stop contaminated groundwater flowing to the sea.

Theoretically, it is natural to assume the high level of contamination is flowing to the sea without anything to stop.




Français :

La radioactivité se multiplie par plus de 57 à l’extérieur du mur souterrain


Selon Tepco, la radioactivité en Cs 134/137 et celle β (dont le Sr 90) augmente rapidement dans les eaux souterraines.

L’échantillon a été pris sur le côté mer du réacteur 2. Sa date est le 12 janvier 2015.
Comparé au relevé précédent du 8 janvier 2015, la radioactivité en Cs 134/137 s’est multipliée par 57, la radioactivité β s’est également multipliée par 57.
C’est le relevé record dans ce forage.
Tepco n’en a pas identifié la cause. Ce forage est à l’extérieur du mur souterrain censé bloquer les eaux souterraines contaminées dans leur route vers la mer.
Théoriquement, il est naturel de supposer que cette forte radioactivité s’écoule vers la mer sans que quoi que ce soit ne l’entrave sur sa route.

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.


January 2015