"The 25th anniversary of Chernobyl and the continuing crisis at Fukushima -- both Level 7 nuclear disasters --  are clear reminders that standard evacuation zones cannot protect the public from a nuclear accident. Current NRC regulations stipulate a 10 mile evacuation zone around nuclear plants. This is clearly insufficient and 50 miles has been recommended."  

This interactive map from Physicians for Social Responsibility shows how many people live within 10 and 50 miles of US nuclear reactors.