what percentage of the united states' electricity comes from nuclear power?
U.S. electricity from nuclear energy in 2016: 19.7 percent, with 805.3 billion kilowatt-hours generated. Number of states with operating reactors: 30. Nuclear plants made up the largest percentage of the electricity generated in 2016 in six states. Nuclear industry capacity factor (2016): 92.1 percent. 1  U.S. Capacity Factors by Fuel Type. 2  U.S. Nuclear Industry Capacity Factors (1980 - 2016) 3  U.S. Nuclear Industry Capacity Factors by Quartile (2014 - 2016)