Tepco “Seawater Cesium level is higher than groundwater”

Related to this article..500,000,000 Bq/m3 of Tritium and 1,000,000 Bq/m3 of Sr-90 detected from groundwater east side of reactor2 [URL]

From this analysis, Tepco found out Cs-134/137 level in seawater is higher than groundwater.

Having this significantly high level of Tritium and Sr-90 detected from groundwater, still seawater is more contaminated when it comes to Cs-134/137.

They concluded the contamination of seawater is not from groundwater.

The reported this below,

The observation holes were drilled and groundwater was obtained/analyzed at the east side of
Unit 1-4 Turbine Buildings. Cesium density detected in groundwater is lower than those detected
in seawater, and it is declining recently. Therefore, the cause is not estimated to be affected by
the groundwater.


The cause is not verified.

2 Tepco "Cesium level is lower in groundwater than seawater"





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Français :

Tepco : “La concentration en césium de l’eau de mer est supérieure à celle des eaux souterraines”


Article lié : Les eaux souterraines de l’est (= côté mer) du réacteur 2 sont à 500 millions de Bq/m³ de Tritium et 1 million de Bq/m³ de Strontium 90

Dans cette analyse, Tepco a découvert que le niveau des césiums 134/137 de l’eau de mer est supérieur à celui des eaux souterraines.

En dépit des graves niveaux de tritium et de strontium 90 relevés dans les eaux souterraines, l’eau de mer reste toujours plus contaminée quand on passe aux césiums 134/137.
Ils en concluent que la contamination de l’eau de mer ne se fait pas par les eaux souterraines.
Ils le rapportent ainsi :

Les trous d’observation ont été forés et de l’eau souterraine en a été extraite/analysée de l’Est des bâtiments des turbines des unités 1-4. La concentration en césium détectée dans les eaux souterraines est inférieure à celle trouvée dans l’eau de mer et elle a récemment diminué. Donc, la cause (ndt: de la contamination en mer) n’est pas estimée être affectée par les eaux souterraines.

La raison n’en est pas connue.

2 Tepco "Cesium level is lower in groundwater than seawater"


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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.


June 2013