Sr-90 density rose up 155 percent of the previous highest reading in the seaside of Reactor 2

From Tepco’s report released on 9/4/2015, the density of Strontium-90 increased to 155% of the previous highest reading in the seaside of Reactor 2.

It was measured in groundwater gathered to pump up. The sampling date was 8/3/2015, Sr-90 density was 2,800,000 Bq/m3. The previous highest reading was 1,800,000 Bq/m3, which was analyzed on 7/2/2015.


From the report of 9/15/2015 about the same area, the density of Mn-54, which has 310 days of a half-life, reached the highest reading of 680 Bq/m3 on 9/10/2015. 4 days later, it rose up to 970 Bq/m3 again.




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Côté mer du réacteur 2, la radioactivité en Sr 90 dépasse de 155 % le précédent record


Selon un rapport de Tepco publié le 4 septembre 2015, sur le côté mer du réacteur 2 la radioactivité en strontium 90 a atteint 155% du précédent record.

Le relevé a été fait dans les eaux souterraines rassemblées pour être pompées. L’échantillon est du 3 septembre 2015. La radioactivité en Sr 90 est de 2 800 000 (2,8 millions) Bq/m³. Le record précédent, du 2 juillet 2015, était de 1 800 000 (1,8 millions) Bq/m³.

Selon ce rapport du 15 septembre, la radioactivité en Mn 54, dont la période est de 310 jours, a atteint un record à 680 Bq/m³ le 10 septembre 2015 dans la même zone. 4 jours plus tard, il est à 970 Bq/m³.

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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.


September 2015