White House Office of Management and Budget directs federal agencies to continue using project labor agreements on construction projects but broadens allowable exceptions.
UK, which will be plant's majority owner, also selected Rolls-Royce SMR as preferred bidder to build small modular reactors at major nuclear power sites and elsewhere.
A pair of proposed rules would repeal emissions standards for fossil fuel-fired power plants and weaken rules on how much mercury and other air toxics can be admitted.