<P> Nuclear power in the United States is provided by 99 commercial reactors with a net summer capacity of 100,350 megawatts ( MW ) , 65 pressurized water reactors and 34 boiling water reactors . In 2016 they produced a total of 805.3 terawatt - hours of electricity , which accounted for 19.7 % of the nation 's total electric energy generation . In 2016 , nuclear energy comprised nearly 60 percent of U.S. emission - free generation . </P>
<P> Nuclear power in the United States is provided by 99 commercial reactors with a net summer capacity of 100,350 megawatts ( MW ) , 65 pressurized water reactors and 34 boiling water reactors . In 2016 they produced a total of 805.3 terawatt - hours of electricity , which accounted for 19.7 % of the nation 's total electric energy generation . In 2016 , nuclear energy comprised nearly 60 percent of U.S. emission - free generation . </P>
in the united states nuclear energy provides which percentage of u.s. energy needs
in the united states nuclear energy provides which percentage of u.s. energy needs
19.7 %
19.7 %