BWXT Y-12 LLC, Oak Ridge, Tenn., made several alternatives commitments for its $2.6 billion pension fund. It committed $50 million to HarbourVest Partners and $25 million to Adams Street Partners for private equity investments, and $50 million to J.P. Morgan Fleming and $50 million to Prudential for commingled real estate funds, said Maureen Williams, manager-investments. Partial funding came from selling the companys shares of Prudential demutualized stock for $60 million. The plan also reduced an active domestic fixed-income portfolio managed by State Street Research, leaving it with $600 million, and an active domestic fixed-income portfolio managed by Jennison, leaving it with $500 million, Ms. Williams said. She would not give the amounts of the reductions but said they were fairly even. The move was made for diversification.