Steam in vented from secondary cooling systems at the North Anna Nuclear power plant in Mineral, Va., Wednesday, Aug. 24, 2011. Dominion Virginia Power says its North Anna Power Station in Louisa ... more 
Steam in vented from secondary cooling systems at the North Anna Nuclear power plant in Mineral, Va., Wednesday, Aug. 24, 2011. Dominion Virginia Power says its North Anna Power Station in Louisa County is no longer relying on backup generators after the reactors were automatically taken off line by safety systems after a magnitude 5.8 earthquake struck the East Coast. (AP Photo/Steve Helber) less 
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Associated Press | Photo By Steve Helber
Wed, Aug 24, 2011 12:11 PM EDT