Strontium measured in Gunma

 

 

2.0 Bq/Kg of strontium was measured from Fujiwara dam in Minakami machi Gunma, 0.7 Bq/Kg of strontium was measured from Oguro river Gunma. Ministry of environment measured strontium contained in water grond soil at 2 locations in Gunma on 3/30/2012.

They measured strontium at 20 points in 5 prefectures from Kanto to North Japan outside of Gunman too. The readings are 6.8~0.4 Bq/Kg.
The ratio of Sr-89 and 90 are not announced.

Source

ストロンチウム 県内で初測定

2012年3月31日
環境省は三十日、県内二地点で水底の泥に含まれる放射性ストロンチウムを測定した。県内で放射性ストロンチウムを測るのは初めて。桐生市の小黒川・萱野橋では一キログラム当たり〇・七ベクレル、みなかみ町の藤原ダムでは同二・〇ベクレルが検出された。
同省が県内を含む関東、東北六県の計二十二地点で測定した値は同〇・四~六・八ベクレル。東京電力福島第一原発事故前の二〇〇九年度の全国調査結果では同〇・二~一四ベクレルだった。
このほか、県内の河川や湖沼など四十七地点で、水底や周辺の土壌などに含まれる放射性セシウムの濃度や空間放射線量を調べた結果を発表した。
調査は二回目で、期間は二~三月。昨年十一~十二月に行った初回調査と同じ地点を調べたが、凍結して調べられない所もあった。初回の結果は一月十三日に発表している。
水底の泥では、利根川の群馬大橋(前橋市)の一キログラム当たり四一〇ベクレルが最高。周辺の土壌では利根川の大正橋(渋川市)で同五六〇〇ベクレルが最高。空間放射線量は桜川の川場村谷地の毎時〇・四三マイクロシーベルトが最も高かった。
県環境保全課の担当者は「泥に吸着した放射性セシウムが下流域に下がっているようだ」と話している。 (伊藤弘喜)

 

 

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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