TOKYO—A prominent Japanese radiation safety specialist has resigned his governmental advisory post in protest over what he calls "inexcusable" standards for school children in Fukushima Prefecture. The Yomiuri Online news web site reported in Japanese this evening that Toshiso Kosako, a radiation safety expert at the University of Tokyo, feels the standards are too lenient and that his advice has been ignored.
On 19 April, the ministry of education announced a "provisional idea" for schoolyards contaminated by radiation emanating from the ravaged Fukushima Daiichi Nuclear Power Plant. The ministry cited a recommendation by the International Commission on Radiological Protection (ICRP), based in Ottawa, Canada, that sets an acceptable level of between 1 and 20 millisieverts (mSv) per year for individuals. In its Application of the Commission's Recommendations to the Protection of People Living in Long-term Contaminated Areas
Sourece: Sciencemag.org