Contaminated groundwater may not only flow to the sea but also marine underground

High level of Tritium and Strontium-90 are measured from groundwater in Fukushima nuclear plant. It is suspected that the contaminated groundwater may be flowing to the sea, but possibly it’s also flowing to the underground of the sea. The groundwater of the sea might be contaminated.

According to Tepco, at least one of the groundwater observation holes is deeper than Fukushima nuclear plant port. Tepco stated that in the press conference of 7/19/2013.

Tepco has been concealing the depth of each borings. They comment it is because the data is still under close inspection.

For the demand of discloser from TV Asahi, Tepco’s spokesman answered one of the borings is 16m deep.

It’s boring No.1. Tepco measured 1,200,000 Bq/m3 of Strontium-90 from the groundwater taken on 6/7/2013. Tepco hasn’t published the Sr-90 data since then.

The exit of Fukushima nuclear plant port is approximately 7.5 ~ 10m deep. Because boring No.1 is located at 4 m above the sea level, the bottom of boring No.1 is theoretically 2 ~ 4.5 m deeper than the sea bottom.

The boring is deeper than the sea ground.

Highly contaminated groundwater was found in the boring deeper than the bottom of the sea. It may be leaking to the underground of the sea.

Tepco didn’t make any explanation about this assumption.



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Français :

Les eaux souterraines extrêmement radioactives ne s’écoulent pas simplement en mer, elles s’écoulent aussi dans le sous-sol marin


Une radioactivité très forte en tritium et strontium 90 est relevée dans les eaux souterraines de la centrale nucléaire de Fukushima. On pense qu’elles s’écoulent en mer mais il est possible qu’elles contaminent aussi le sous-sol marin. Les fonds marins sont sans doute eux aussi contaminés.

Selon Tepco, au moins un des trous d’observation du sous-sol descend en dessous du fond du port de la centrale nucléaire de Fukushima. Tepco l’a affirmé pendant sa conférence de presse du 19 juillet 2013.
Tepco a caché la profondeur de tous ses forages. Ils déclarent que c’est parce que ces données sont toujours en cours d’examen étroit.
A la demande d’une publication de Asahi TV, le porte-parole de Tepco a répondu que la profondeur des forages est de 16 m.
C’est dans le forage n°1 que Tepco avait relevé 1 200 000 Bq/m³ de strontium 90 dans les eaux souterraines du 7 juin 2013. Tepco n’a plus rien publié sur le Sr 90 depuis cette date.
La sortie du port de la centrale nucléaire de Fukushima est à environ 7,5 – 10 m de profondeur. Attendu que le forage n°1 commence à 4 m au-dessus de la mer, son fond doit théoriquement être entre 2 et 4 m 50 sous le plancher de la mer.
Le forage descend plus profond que le fond marin.
On a trouvé des eaux souterraines extrêmement radioactives au fond de ce forage plus profond que le fond de la mer. Elles s’écoulent donc sans doute dans le sous-sol marin.
Tepco n’a donné aucune explication suite à cette supposition.

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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.