$91,000,000 shall be transferred to Department of Energy—Energy Programs—Nuclear Energy , for the Advanced Test Reactor: Provided , That of such amount, $53,700,000 shall be available until September 30, 2022, for program direction. Federal salaries and expenses For expenses necessary for Federal Salaries and Expenses in the National Nuclear Security Administration, $454,000,000, to remain available until September 30, 2022, including official reception and representation expenses not to exceed $17,000. 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 expenses necessary for atomic energy defense environmental cleanup activities in carrying out the purposes of the Department 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, and the purchase of not to exceed one passenger minivan for replacement only, $6,321,000,000, to remain available until expended: Provided , That of such amount, $282,093,000 shall be available until September 30, 2022, for program direction. Defense uranium enrichment decontamination and decommissioning (including transfer of funds) For an additional amount for atomic energy defense environmental cleanup activities for Department of Energy contributions for uranium enrichment decontamination and decommissioning activities, $821,583,000, to be deposited into the Defense Environmental Cleanup account which shall be transferred to the “Uranium Enrichment Decontamination and Decommissioning Fund”. Other defense activities For Department of Energy expenses, including the purchase, construction, and acquisition of plant and capital equipment and other expenses, necessary for atomic energy defense, other defense activities, and classified activities, in carrying out the purposes of the Department of