More distressing, they found that three-quarters of the schools they visited had levels that exceeded the yearly exposure limit for employees at Japan's nuclear plants.
The EEL represents a cumulative exposure limit taking into account both the time of exposure and the concentration at which the exposure occurs.
While exposure at these levels may produce injury, the injury would be reversible. The EEL represents a cumulative exposure limit taking into account both the time of exposure and the concentration at which the exposure occurs.
A continuous exposure limit of 40 mT is given for the general public.
