Sr-90 density spiked 170 percent at an observation well beside Reactor 2

On 12/15/2015, Tepco reported the Strontium-90 density jumped up at one of the observation wells near Reactor 2.

This well is to detect the radiation level in groundwater, situated between the port and Reactor 2.


The highest density detected from this well was 7,100,000 Bq/m3, which the sampling date was this October. However the latest reading was 12,000,000 Bq/m3, which is 1.69 times higher the previous reading. This sample was collected on 11/3/2015. They keep measuring the highest density of Sr-90 for 2 continuous months.

Sr-90 was detected from all the observation wells in this area.




Français :

La radioactivité en strontium 90 augmente de 170 % dans un puits d’observation à côté du réacteur 2


Le 15 décembre 2015, Tepco rapporte que la radioactivité en strontium 90 est montée en flèche dans l’un des puits d’observation proches du réacteur 2.

Situé entre le réacteur 2 et le port, ce puits permet de relever la radioactivité des eaux souterraines.
Le dernier record enregistré dedans était de 7 100 000 (7,1 millions de) Bq/m³ dans l’échantillon d’octobre dernier. Or, le dernier relevé affiche 12 000 000 (12 millions de) Bq/m3, soit 1,69 fois plus que le relevé précédent de l’échantillon du 3 novembre 2015. Depuis 2 mois ils enregistrent constamment record sur record pour cette radioactivité en strontium.
Du Sr 90 a aussi été relevé dans tous les autres puits d’observation de la zone.

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.


December 2015