214,200 Bq/Kg of Radioactive Cesium from Crushed Stones from Namie-machi, Fukushima

Remember the radioactive apartment complex in Nihonmatsu City, Fukushima, where the concrete foundation contained the supposed "radioactive" crushed stone from the stone pit in Namie-machi, bordering the "no-entry" zone?

Fukushima Prefecture finally released the data on the radioactivity of the stones, and it was indeed high. The survey by the Fukushima prefectural government and the Ministry of Economy, Trade and Industry is still ongoing, in an effort to identify the elevated radiation levels coming off the concrete that used these crushed stones. Good luck.

Jiji Tsushin (2/15/2012) reports:

...県は、１月２０日に実施した砕石場の現地調査の結果も公表。屋根のない保管場所では生コン用砕石から１キロ当たり最大１２万２００ベクレル、路盤材用砕石からは同２１万４２００ベクレルの放射性セシウムが検出されたという。

...Fukushima Prefecture also announced the result of the survey at the stone pit [in Namie-machi] conducted on January 20. The crushed stones for concrete stored in the open without a roof were found with the maximum 120,200 becquerels/kg of radioactive cesium, while the crushed stones used as subbase course materials were found with 214,200 becquerels/kg.

(At least) 7 tonnes of stones (for building exterior) from Fukushima Prefecture were sold in Tokyo last year, as I reported in my post on January 22, 2012. I haven't heard news of whatever happened to them.

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