High cesium levels detected over 250 km from Fukushima Daiichi

[kristopher]

High cesium levels detected over 250 km from Fukushima Daiichi – Up to 600,000 Bq per square meter or higher in 60 Km radius

According to the measurements released Sept. 27, most of the radioactive cesium first spread about 60 km northwest from the Fukushima nuclear plant, then changed course and spread to Tochigi Prefecture and further to Gunma Prefecture.

A plume of radioactive materials was carried by winds along the mountain range and then fell to the ground, according to ministry officials.

In Gunma Prefecture, the largest amount of cesium-137 accumulated in the northern part of the prefecture. Cesium-137′s half-life, the period it takes for materials to be reduced by 50 percent, is 30 years.

The radioactive accumulation reached a range between 100,000 and 300,000 becquerels per square meter in a mountainous area encompassing the cities of Midori and Kiryu in the eastern part of the prefecture, about 180 km from the Fukushima nuclear plant.

Even in ...


http://enformable.com/2011/09/high-cesium-levels-detected-as-far-away-as-gunma-prefecture-up-to-300000-bq-per-square-meter/