Radiation levels across the Fukushima power plant site have dropped significantly as clean-up efforts continue. Most workers receive less than 1 milliSievert of radiation per month - well within normal limits. Tokyo Electric Power Company (Tepco) has employed some 25,837 workers at the power plant since March 2011, keeping records of their radiation doses during the accident as well as the clean-up operation.
A radiation survey map of the site made last week revealed substantial progress: the highest dose rate anywhere on the site was 0.15 milliSieverts per hour (mSv/h) near units 3 and 4. Two years ago a similar survey put the highest dose rate at 300 mSv/h near rubble lying alongside unit 3.
-tk-