Cs-134:137 ratio of reactor3 sub-drain is 91.3% on 5/20/2013

According to Tepco, Cs-134:137 ratio of reactor3 sub-drain is unusually high.

The half-life of Cs-134 is 2 years, the one of Cs-137 is 30.1 years.

From the samples of 5/20/2013, the Cs-134:137 ratio of reactor1 sub-drain was 41.94 %, the one of reactor2 sub-drain was 46.34 %, where the ratio of reactor3 sub-drain was 91.30 %. (The graph below)

It suggests the possibility that Cs-134 is being produced to raise the ratio.

On 5/22/2013, Tepco didn’t release the radioactivity density data of sub-drain so it’s impossible to investigate the trend.

Cs-134:137 ratio of reactor3 sub-drain is 91.3% on 5/20/2013





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Now your donation will be spent on the next research for the possibile Japanese village in Romania. (560€)
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Français :

Le 20 mai 2013, la proportion de césium 134/137 du réacteur 3 est de 91,3 %


Selon Tepco, la proportion de Cs 134 / 137 des évacuations du réacteur 3 est anormalement élevée.
La demie-vie du Cs 134 est de 2 ans, celle du Cs 137 de 30,1 ans.
Dans les échantillons du 20 mai 2013, la proportion de Cs 134/137 était de 41,94 % dans les évacuations du réacteur 1 , elle était de 46.34 % dans celles du réacteur 2 et elle est de 91.30 % dans celles du réacteur 3 (graphique ci-dessous)
Ceci laisse penser que du césium 134 se crée actuellement pour augmenter cette proportion.
Le 22 mai 2013, Tepco n’a pas publié les densités radioactives des évacuations, il est donc impossible d’en suivre la progression.

Le 20 mai 2013, la proportion de césium 134/137 du réacteur 3 est de 91,3 %

Merci pour votre soutien.
A présent vos dons seront consacrés à la recherche suivante : la faisabilité d’un village japonais en Roumanie. (560 €)
Pour l’instant, il manque 471 €.

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.


May 2013