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Tritium density in one of the bypass wells keeps increasing since this August

Related to this article.. Approx. 84,000 m3 of contaminated groundwater has been discharged to the Pacific from bypass wells [URL]

 

From Tepco’s report released on 10/7/2015, Tritium density has been increasing at one of the bypass wells since this August (See the graph below). Tepco is still pumping up groundwater from this well to discharge to the Pacific.

It is the well called No.10. Tritium density was 1,500,000 Bq/m3 on 8/20/2015 however it reached 2,400,000 Bq/m3 on 10/1/2015. This is from 3.9 ~ 533 times higher than other wells.

Tepco is diluting it by mixing with lower density groundwater to discharge.

The cause of this increase has not been announced.

 

Tritium density in one of the bypass wells keeps increasing since this August

 

 

http://www.tepco.co.jp/nu/fukushima-np/handouts/2015/images/handouts_151007_02-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2015/images/pump_well_15100702-j.pdf

 

 

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Français :

La radioactivité en Tritium de l’un des puits de dérivation continue d’augmenter depuis août dernier

D’après un rapport de Tepco publié le 7 octobre 2015, la radioactivité en tritium a augmenté à l’un des puits de dérivation depuis août dernier (Voir le graphique ci-dessous). Tepco pompe toujours les eaux souterraines de ce puits pour les déverser dans le Pacifique.

Il s’agit du puits N° 10. Sa radioactivité en tritium était de 1,5 millions de Bq/m³ au 20 août 2015 et elle a atteint 2,4 millions de Bq/m³ le 1er octobre 2015. C’est de 3,9 à 533 fois plus élevé que dans les autres puits.
Tepco la dilue en la mélangeant avec des eaux souterraines pompées de radioactivité inférieure.
La raison de cette augmentation n’est pas communiquée.

Tritium density in one of the bypass wells keeps increasing since this August

http://www.tepco.co.jp/nu/fukushima-np/handouts/2015/images/handouts_151007_02-j.pdf
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2015/images/pump_well_15100702-j.pdf

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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