of Energy Organization Act ( 42 U.S.C. 7101 et seq.), including the acquisition or condemnation of any real property or any facility or for plant or facility acquisition, construction, or expansion, $1,825,461,000, to remain available until expended: Provided , That funds provided by this Act for Project 99–D–143, Mixed Oxide Fuel Fabrication Facility, and by prior Acts that remain unobligated for such Project, may be made available only for construction and project support activities for such Project: Provided further , That of the unobligated balances from prior year appropriations available under this heading, $49,000,000 is hereby rescinded: Provided further , That no amounts may be rescinded from amounts that were designated by the Congress as an emergency requirement pursuant to a concurrent resolution on the budget or the Balanced Budget and Emergency Deficit Control Act of 1985. Naval reactors (including transfer of funds) For Department of Energy expenses necessary for naval reactors activities to carry out the Department of Energy Organization Act ( 42 U.S.C. 7101 et seq.), including the acquisition (by purchase, condemnation, construction, or otherwise) of real property, plant, and capital equipment, facilities, and facility expansion, $1,486,000,000, to remain available until expended, of which, $82,500,000 shall be transferred to Department of Energy—Energy Programs—Nuclear Energy , for the Advanced Test Reactor: Provided , That of such amount, $46,651,000 shall be available until September 30, 2019, for program direction. Federal salaries and expenses For expenses necessary for Federal Salaries and Expenses in the National Nuclear Security Administration, $412,595,000, to remain available until September 30, 2019, including official reception and representation expenses not to exceed $12,000. Environmental and other defense activities Defense environmental cleanup For Department of Energy expenses, including the purchase, construction, and acquisition of plant and capital equipment and other