1979 Three Mile Island accident Nuclear energy policy of the United States

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one of largest accidents 3 mile island incident in middleton, pennsylvania in 1979. believed today have been caused human error, partial-meltdown occurred when valve left open, letting out substantial amounts of reactor coolant.


governor dick thornburgh, on advice of nrc chairman joseph hendrie, advised evacuation of pregnant women , pre-school age children...within five-mile radius of 3 mile island facility. evacuation zone extended 20-mile radius on friday march 30. within days, 140,000 people had left area. more half of 663,500 population within 20 mile radius remained in area. according survey conducted in april 1979, 98% of evacuees had returned homes within 3 weeks.


although debate remains, several health studies found there no long-term adverse effects on health of population living around 3 mile island. though there release of radiation, radiation dose people living within 10 miles of plant 8 millirem, , no more 100 millirem single individual. 8 millirem equal chest x-ray, , 100 millirem third of average background radiation received u.s. residents in year.



aerial photo of chernobyl, taken russian space station, mir








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