High radiation levels found beyond 30-km radius
2011/04/09
A study of soil samples has revealed that as much as 400 times the normal levels of radiation could remain in communities beyond a 30-kilometer radius from the Fukushima No. 1 nuclear power plant, where explosions spewed radioactive materials into the atmosphere.
The study was conducted by a team of experts from Kyoto University and Hiroshima University.
According to the study, the accumulated amount of radiation in the soil at Iitate, Fukushima Prefecture--which is located outside of the 30-km radius--calculated over a three-month period would exceed the annual accumulated amount of 20 millisieverts that the central government is considering as a guideline for evacuating residents.
...Government studies have also found evidence of radiation contamination beyond the 30-km radius. The results show that radiation has not been spreading from the nuclear power plant in a concentric manner.
The predicted changes in the level ...
Read the rest at
http://www.asahi.com/english/TKY201104080169.html