The risk for children sounds much higher than should be tolerated, so it's easy to see why the parents in Japan are upset. It takes a lot to anger the Japanese, but education officials who are easing regulations somehow managed. The Guardian:
Ministers have defended the increase in the acceptable safety level from 1 to 20 millisieverts per year as a necessary measure to guarantee the education of hundreds of thousands of children in Fukushima prefecture, location of the nuclear plant that suffered a partial meltdown and several explosions after the earthquake and tsunami on 11 March.
It is estimated that 75% of Fukushima's schools may have radiation levels above the old safety level of 1 millisievert. The local authorities in Koriyama have tried to ease the problem by digging up the top layer of soil in school and day centre playgrounds, but residents near the proposed dump site have objected.
The new standard of 20 millisieverts a year – equivalent to the annual maximum dose for German nuclear workers – will mean those schools remain open, but parents and nuclear opponents are angry that safety concerns are being ignored.
