PUBLIC LAW 104-206—SEPT. 30, 1996 110 STAT. 2995 Section 161k. of the Atomic Energy Act of 1954 (42 U.S.C. 2201k) with respect to the Paducah Gaseous Diffusion Plant, Kentucky, and the Portsmouth Gaseous Diffusion Plant, Ohio, the guidelines shall require, at a minimum, the presence of an adequate number of security guards carrying side arms at all times to ensure maintenance of security at the gaseous diffusion plants. Section 311(b) of the USEC Privatization Act (Public Law 104- 134, title III, chapter 1, subchapter A) insert the following: "(3) The Corporation shall pay to the Thrift Savings Fund such employee and agency contributions as are required or authorized by sections 8432 and 8351 of title 5, United States Code, for employees who elect to retain their coverage under CSRS or FERS pursuant to paragraph (1).". URANIUM ENRICHMENT DECONTAMINATION AND DECOMMISSIONING FUND For necessary expenses in carrying out uranium enrichment facility decontamination and decommissioning, remedial actions and other activities of title II of the Atomic Energy Act of 1954 and title X, subtitle A of the Energy Policy Act of 1992, $200,200,000, to be derived from the Fund, to remain available until expended: Provided, That $34,000,000 of amounts derived from the Fund for such expenses shall be available in accordsince with title X, subtitle A, of the Energy Policy Act of 1992. GENERAL SCIENCE AND RESEARCH ACTIVITIES For expenses of the Department of Energy activities including the purchase, construction and acquisition of plant and capital equipment and other expenses necessary for general science and research 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 facility or for plant or facility acquisition, construction, or expansion, $996,000,000, to remain available until expended. NUCLEAR WASTE DISPOSAL FUND For nuclear waste disposal activities to carry out the purposes of Public Law 97-425, as amended, including the acquisition of real property or facility construction or expansion, $182,000,000, to remain available until expended, to be derived from the Nuclear Waste Fund: Provided, That none of the funds provided herein shall be distributed to the State of Nevada or affected units of local government (as defined by Public Law 97-425) by direct pay- ment, grant, or other means, for financial assistance under section 116 of the Nuclear Waste Policy Act of 1982, as amended: Provided further. That the foregoing proviso shall not apply to pa5anents in lieu of taxes under section 116(c)(3)(A) of the Nuclear Waste Policy Act of 1982, as amended: Provided further, That no later than September 30, 1998, the Secretary shall provide to the President and to the Congress a viability assessment of the Yucca Mountain site. The viability assessment shall include: (1) the preliminary design concept for the critical elements for the repository and waste package; (2) a total system performance assessment, based upon the design concept and the scientific data and analysis available Kentucky. Ohio. Guidelines. Ante, p. 1321- 340. Assessment. 42 USC 10134 note.