Strontium-90 detected in potentially discharged water from Reactor 1 and 3
2,800 ~ 11,000 Bq/m3 of Strontium-90 have been detected from pumped water around Reactor 1 and 3, according to Tepco.
On 10/1/2014, Tepco released nuclide analysis data of groundwater. The tested groundwater was pumped up from the facilities called “sub-drain” located beside Reactor 1 ~ 4.
These “sub-drains” were originally to reduce groundwater volume to flow into the basement of each reactor building, however abandoned because of the high level of contamination after 311. Tepco is trying to restart using these sub-drains to pump up highly contaminated water and to discharge to the sea.
(cf, Tepco to pump up highly contaminated groundwater for potential discharge today / Drainage plan submitted to NRA [URL])
The samples were taken this September and last September. From the sample near Reactor 1, 11,000 Bq/m3 of Strontium-90 was detected last September. From the sample near Reactor 3, 2,800 Bq/m3 of Strontium-90 was measured this September.
These readings were not checked by third party organizations, so the actual density can be higher than announced.
Either way, the data shows groundwater contamination is spreading from around the reactor buildings to the outside of the port. (cf, Strontium-90 detected outside of Fukushima port / Highest reading in front of Reactor 4 too [URL 2])
Selon Tepco, entre 2 800 et 11 000 Bq/m³ de strontium 90 ont été relevés dans les eaux pompées autour des réacteurs 1 et 3.
Le 1er octobre 2014, Tepco a publié les résultats des analyses des eaux souterraines. Les eaux souterraines analysées proviennent des pompages des équipements appelés “sous-drains” situés à côté des réacteurs 1 à 4.
Les échantillons ont été pris fin septembre dernier. Dans les échantillons pris à proximité du réacteur 1, ils ont relevé 11 000 Bq/m³ de strontium 90 en septembre dernier. Dans ceux pris à proximité du réacteur 3 et toujours en septembre, ils ont relevé 2 800 Bq/m³ de strontium 90.
Ces relevés n’ont pas été contrôlés par des sous-traitants, donc le véritable niveau radioactif est sans doute plus élevé que celui annoncé.
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.