The White House said President Barack Obama remains committed to keeping nuclear energy as part of the energy mix despite concerns about its safety after the earthquake in Japan.
"It remains a part of the president's overall energy plan," Reuters quoted White House spokesman Jay Carney as saying about nuclear energy.
The administration's proposed Clean Energy Standard calls on power companies to produce 80 percent of their electricity from sources including natural gas, clean coal, renewables like solar and wind power and nuclear by 2035. Mr. Obama included nuclear in the plan to help win support for it from Republicans.
The Nuclear Regulatory Commission hopes to decide by the end of the year whether to approve construction licenses for four new reactors.
Read more on the nuclear crisis in Japan.