Frequent Questions

What is the basis for the PAGs?

The PAGs’ trigger levels are designed to prevent immediate health effects from radiation while balancing the risks of long-term health effects against the risks of protective actions, such as accidents from evacuation or sanitary risks from sheltering-in-place.

Balancing the risks between radiation exposure and protective actions is important. During the 2011 Fukushima nuclear power accident, no one died as a result of radiation exposure.  However, over 1,000 people died from the evacuation, primarily elderly hospital patients who had to be moved from areas without power. The 2013 PAG Manual makes use of the lessons learned in Fukushima.

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