Cs-134/137 density of Reactor 1 basement water continues to increase since last July / 1,790,000,000Bq/m3

According to Tepco, Cs-134/137 density of contaminated water that is retained in the basement of Reactor 1 has been increasing since last July.

On 3/4/2015, Tepco published the latest data of Cesium-134/137 density of retained water in Reactor 1 turbine building.

This water is assumed to be the mixture of leaked coolant water and groundwater that keeps coming in from the outside of the crippled building.

The report reads Cs-134/137 density was 1,790,000,000 Bq/m3 from the sample taken on 1/28/2015.

It was 1,670,000,000 Bq/m3 in November, 1,470,000,000 Bq/m3 in September, 1,460,000,000 Bq/m3 in July, which shows it has been constantly increasing though they release data only every two months.

It is not identified what keeps making the contamination level higher for 7 months in water retained in Reactor 1 basement.

 

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_140730-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_140926-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_141128-j.pdf

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2015/images/tb_water_150304-j.pdf

 

 

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Français :

La radioactivité en césium de la base du réacteur 1 continue d’augmenter depuis juillet : 1,79 milliards de Bq/m³

 

Selon Tepco, la radioactivité en Cs 134/137 des eaux contaminées retenues dans les fondations du réacteur 1 augmente depuis juillet dernier.

Le 4 mars 2015, Tepco a publié ses dernières données sur la radioactivité des eaux retenues dans le bâtiment de la turbine du réacteur 1. Ces eaux sont supposées être un mélange de liquide de refroidissement et d’eaux souterraines qui continuent d’entrer dans le bâtiment dévasté.

Le rapport indique que la radioactivité en Cs 134/137 était de 1 790 000 000 (1,79 milliards de) Bq/m³ dans un échantillon du 28 janvier 2015. Elle était de 1 670 000 000 (1,67 milliards de) Bq/m³ en novembre, 1 470 000 000 (1,47 M) Bq/m³ en septembre, 1,46 M Bq/m³ en juillet, ce qui montre qu’elle augmente en continu bien qu’ils ne publient ces données qu’une fois tous les deux mois.

Ce qui provoque depuis 7 mois cette augmentation de la radioactivité de la base du bâtiment du réacteur 1 n’est pas identifié.

http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_140730-j.pdf
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_140926-j.pdf
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2014/images/tb_water_141128-j.pdf
http://www.tepco.co.jp/nu/fukushima-np/f1/smp/2015/images/tb_water_150304-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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