Special Report

America's Oldest Nuclear Power Plants

Methodology

To identify the oldest nuclear power plants in the U.S., 24/7 Wall St. reviewed the start dates of commercial operation for nuclear reactors in the United States using data compiled by the Nuclear Regulatory Commission. Plants are ranked by the date their oldest active nuclear reactor went online. 

To compare each power plant’s electricity production capacity, we summed each plant’s reactors’ megawatt electricity (MWe). 

Plant names and data are as identified on the license as of August 2022. The next printed update will be in September 2022.

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