[Leakage] Leaking radiation takes up to 100 years to reach Pacific ocean

About the major leakage of highly contaminated water, Tepco published the assessment of the environmental influence.

The leaking reservoirs are 880 m from the sea. About Sr-90 and Tritium, Tepco estimated it takes 10 ~ 100 years for the nuclides to penetrate underground to reach sea.

Because they don’t even know the ground water level, they simulated the speed based on the two assumptions that the ground water level was O.P.+30m, and it was 20m. (O.P. = Onahama peil)

On the assumption that it was 30m, Sr-90 and Tritium would take 10 ~ 100 years to reach sea but the concentration would be 10^-7 and 10^-3 times much as original.

On the assumption that it was 20m, Sr-90 and Tritium would take 20 ~ 100 years to reach sea but the concentration would be 10^-8 and 10^-4 times much as original.

[Leakage] Leaking radiation takes up to 100 years to reach Pacific ocean

 

Related article..600 tones of contaminated water “missing” from the reservoir, Tepco “Error of the measurement hardware” [URL]

 

http://www.tepco.co.jp/nu/fukushima-np/handouts/2013/images/handouts_130419_05-j.pdf

 

 

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Français :

[Fuites] La radioactivité qui a fuit mettra jusqu’à 100 ans pour atteindre l’océan Pacifique

 

Concernant les fuites d’eau extrêmement radioactives, Tepco publie son évaluation de leur influence sur l’environnement.

Les réservoirs qui fuient sont à 880 m de la mer. Sur le Sr 90 et le tritium, Tepco a estimé qu’il faudrait entre 10 et 100 ans pour que les nucléides pénètrent dans le sous-sol et atteignent la mer.
Ils ont simulé la vitesse en se basant sur deux hypothèses, l’une que le niveau de l’eau en sous-sol est à O.P.+30 m et l’autre à 20 m. (O.P. = Onahama peil) parce qu’ils ne connaissent même pas le niveau de cette eau.

Sur la base de 30 m, le Sr 90 et le tritium devraient mettre entre 10 et 100 ans pour arriver à la mer mais leurs concentrations devraient être le dix millionième et le millième de ce qu’elles sont au départ.
Sur la base de 20 m, Le Sr 90 et le tritium devraient mettre entre 20 et 100 ans pour atteindre la mer mais leurs concentrations devrait être alors le cent millionième et le dix millième de ce qu’elles sont au départ.

[Leakage] Leaking radiation takes up to 100 years to reach Pacific ocean

Article lié : 600 tonnes d’eau extrêmement radioactive “portées manquantes” dans le réservoir – Tepco : “Erreur de mesure matérielle”

http://www.tepco.co.jp/nu/fukushima-np/handouts/2013/images/handouts_130419_05-j.pdf

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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.

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