Thirty workers from the Fukushima nuclear power plant were exposed to radiation levels that exceeded the limit prior to the crisis, said Saturday the company Tokyo Electric Power Co.
The limit of 100 mSv per year was elevated to 250 mSv in the midst of the crisis. None of the workers has reached the new limit, said the managing company of the atomic plant.
Leakage from reactors in the plant has stabilized somewhat since the early days of the crisis, but some interior spaces in enclosures to which damaged the earthquake and tsunami still maintain high levels of radiation, which precludes the entry of workers in them.
In the U.S., the limit of radiation exposure is 50 mSv per year for nuclear industry workers. According to experts, it is shown that cumulative doses of 500 mSv increase the risk of developing cancer in people.