Nuclear waste cleanup, Paducah, KY: hearing before the Subcommittee on Energy Research, Development, Production, and Regulation of the Committee on Energy and Natural Resources, United States Senate, One Hundred Sixth Congress, second session, on the April, 2000 report entitled "Nuclear Waste Cleanup--DOE's Paducah Plan Faces Uncertainties and Excludes Costly Cleanup Activities," June 27, 2000