Residents from a 30-kilometer radius of the stricken Fukushima No. 1 nuclear power plant were exposed to up to 50 milisieverts of radiation for two months after the onset of the crisis, according to researchers at Hirosaki University.
When including exposure after they were evacuated, some are expected to have readings of 68 milisieverts a year, or more than three times the figure set by the central government when it ordered the evacuations.
The researchers estimated that radiation levels in the area during the two months before the evacuations came to 50 millisieverts.
Had residents of the Akougi area of Namie in the prefecture stayed, they would be exposed to radiation at a level of 190 millisieverts a year, according to the team's assessment.
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