; (2) replace facilities that are no longer cost effective to renovate or operate; (3) modernize utility systems to prevent failures and ensure efficiency; (4) remove excess facilities to allow safe and efficient operations; and (5) construct modern facilities to conduct advanced research in controlled environmental conditions. (b) Approach In carrying out this section, the Director shall utilize all available approaches and mechanisms, including capital line items, minor construction projects, energy savings performance contracts, utility energy service contracts, alternative financing, and expense funding, as appropriate. 11. Authorization of appropriations (a) Fiscal year 2018 There are authorized to be appropriated to the Secretary for the Office of Science for fiscal year 2018 $6,259,903,000, of which— (1) $2,090,000,000 shall be for Basic Energy Science; (2) $908,000,000 shall be for High Energy Physics; (3) $673,000,000 shall be for Biological and Environmental Research; (4) $684,000,000 shall be for Nuclear Physics; (5) $810,000,000 shall be for Advanced Scientific Computing Research; (6) $532,111,000 shall be for Fusion Energy Sciences; (7) $257,292,000 shall be for Science Laboratories Infrastructure; (8) $183,000,000 shall be for Science Program Direction; (9) $103,000,000 shall be for Safeguards and Security; and (10) $19,500,000 shall be for Workforce Development for Teachers and Scientists. (b) Fiscal year 2019 There are authorized to be appropriated to the Secretary for the Office of Science for fiscal year 2019 $6,600,000,000, of which— (1) $2,129,233,000 shall be for Basic Energy Science; (2) $1,004,510,000 shall be for High Energy Physics; (3) $673,000,000 shall be for Biological and Environmental Research; (4) $690,000,000 shall be for Nuclear Physics; (5) $899,010,000 shall be for Advanced Scientific Computing Research; (6) $640,000,000 shall be for Fusion Energy Sciences; (7) $257,292,000 shall be for Science Laboratories Infrastructure; (8) $181,345,000 shall be for Science Program Direction