How safe are the plants, no matter their age? The U.S. Nuclear Regulatory Commission promotes a "defense-in-depth" approach to nuclear safety and security, meaning multiple independent barriers of protection from human or mechanical failures. The world nuclear industry has revisited safety regulations and protocols since the Fukushima disaster in 2011.
Exelon Corp.'s Dresden Generating Station, in Morris, Illinois, contains a retired unit and two operational General Electric boiling
water reactors capable of producing approximately 1.7 gigawatts of
electricity. That's enough to power more than 1.5 million average U.S. homes. Unit 2 opened on June 9, 1970, about 17 months before Unit 3 (pictured in March 2011).
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