** FILE ** In this Dec. 15, 2011, file photo, Nuclear Regulatory Commission (NRC) Chairman Gregory Jaczko prepares to testify on Capitol Hill in Washington. An internal investigation has concluded that Jaczko, the departing chairman of the NRC, engaged in bullying and intimidation, creating a tense working environment at the agency. (AP Photo/Susan Walsh)
Elmo Collins, regional administrator of the Nuclear Regulatory Commission, speaks June 17, 2012, during an interview in San Juan Capistrano, Calif. (Associated Press)
President Obama nominated Kristine L. Svinicki to the Nuclear Regulatory Commission despite opposition from Senate Majority Leader Harry Reid. (NRC via Associated Press)
Southern Company official Thomas A. Fanning called the Nuclear Regulatory Commission's approval of two nuclear reactors "a monumental accomplishment for Southern Company, Georgia Power, our partners and the nuclear industry. (Associated Press)
Nuclear Regulatory Commission Chairman Gregory B. Jaczko prepares to testify on Capitol Hill in Washington on Thursday, Dec. 15, 2011, at a Senate Clean Air and Nuclear Safety subcommittee hearing. (AP Photo/Susan Walsh)
** FILE ** Nuclear Regulatory Commission Chairman Gregory Jaczko speaks to members of the media Thursday, Nov. 10, 2011, in Atlanta. (AP Photo/David Goldman)