Radiation level increased at half of the measurement points in two lakes of Chiba

According to Chiba prefectural government, radiation level (Cs-134/137) increased at about half of all the measurement points in two lakes.

The lakes are Inba-numa and Tega-numa. They are 191 km and 187 km from Fukushima nuclear plant.

From 3/1 to 3/25/2013, they analyzed the radiation level in the ground soil of those two lakes.

As a result, at 3 of 5 points in Inba-numa, and 4 of 8 points in Tega-numa, the radiation level increased since last time.

The last test was conducted from 12/26/2012 to 1/16/2013.

The highest readings were 2,680 Bq/Kg in Inba-numa and 12,200 Bq/Kg in Tega-numa.

The largest increasing rate was 159% in Tega-numa. At this location, the radiation level keeps increasing since the first test of last May.

 

5/24/2012 ~ 6/6/2012 : 540 Bq/Kg
12/26/2012 ~ 1/16/2013 : 790 Bq/Kg
3/1/2013 ~ 3/25/2013 : 1,260 Bq/Kg

 

http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3graph.pdf

http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3inba.pdf

http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3tega.pdf

http://www.pref.chiba.lg.jp/suiho/press/2013/inte/130430intemonitor3.html

 

 

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Français :

Dans deux lacs de Chiba, la radioactivité a augmenté sur la moitié des points de relevé

 

Selon la préfecture de Chiba, la radioactivité (Cs 134 et 137) a augmenté sur environ 50% des points de relevé de deux lacs.

Les lacs sont celui d’Inba-numa et celui de Tega-numa.
Ils sont respectivement à 191 et 187 km de la centrale nucléaire de Fukushima.

Ils ont relevé la radioactivité de leur  fonds entre le 1er et le  mars 2013.
Au bilan et depuis la dernière fois, la radioactivité a augmenté sur 3 des 5 points de Inba-numa et 4 des 8 points de Tega-numa.
Les mesures précédentes avaient été prises entre le 26 décembre 2012 et le 16 janvier 2013.
Les records sont de 2 680 Bq/kg à Inba-numa et 12 200 Bq/kg à Tega-numa.
L’augmentation la plus importante est de 159 % pour Tega-numa. En ce point, le niveau de la radioactivité augmente depuis le premier relevé de mai dernier.

24 mai 2012 ~ 6 juin 2012 : 540 Bq/kg
26 décembre 2012 ~ 16 janvier 2013 : 790 Bq/kg
1er mars 2013 ~ 25 mars 2013 : 1 260 Bq/kg

http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3graph.pdf
http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3inba.pdf
http://www.pref.chiba.lg.jp/suiho/press/2013/inte/documents/130430inte3tega.pdf
http://www.pref.chiba.lg.jp/suiho/press/2013/inte/130430intemonitor3.html

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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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