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The reactor decommissioning plan for the Fukushima plant stipulates that radiation levels around the boundaries of the facility should be below 1 millisievert per year. That way, TEPCO can minimize the negative impact of radiation on areas outside the plant, according to the plan.
With a succession of high radiation levels reported on the plant premises and elsewhere, the NRA set up radiation monitoring devices at an additional 400 locations in 12 cities, towns and villages around the stricken facility, including ones in evacuation zones.
According to the NRA, the number of locations where such instruments are set up has risen from 446 to 815. The newly installed devices started full-scale operations on Jan. 10.
The additional instruments were installed at centers for local community meetings and other places where residents will likely gather after they are allowed to return home.
The NRA measures air dose rates 0.5 to 1 meter above the ground every 10 minutes.
The monitoring results are available on the NRA’s website at http://radioactivity.nsr.go.jp/en/
Read more at Radiation levels near Fukushima plant boundary 8 times the government standard
