As reported here (but you have to do the math of 10 mSv divided by 264 hours times 1000):
On Monday, the [Japanese] government announced that radiation of more than 10 millisieverts had been detected at one location in Namie Town, some 30 kilometers northwest of the plant. The figure is what a person would be exposed to if they stayed outdoors for 11 consecutive days at the location. It is 10 times higher than the 1 millisievert-per-year long-term reference level for humans as recommended by the International Commission on Radiological Protection.
The prefectural government is measuring from Tuesday more than 1,400 institutions in the prefecture outside the 20-kilometer evacuation zone.
If the recommended limit is 1 mSv per year, however, it is utterly misleading to suggest the problem in Namie is 10 times higher than it should be. It is, but only for eleven days. This is comparing 11 day apples with 365 day oranges. The problem is much worse.
The fact is, people are getting almost a millisievert per 24 hour day, 909 microsieverts to be exact, if the radiation has been properly measured. At the levels indicated, people in Namie would get 332 mSv in a year, 332 TIMES normal for a year, if normal is 1.
The reported radiation level of almost 38 microsieverts per hour, if it is accurate, is much lower than prior reports here and here, which were 161 microsieverts per hour around March 21st and 1,400 microsieverts per hour around March 27th.
Radiation at the main gate to Fukushima Daiichi, one kilometer from the reactors, at the latest reading was 121 microsieverts per hour, over three times worse than in Namie.
