No amount may be expended under this subchapter with respect to any site licensed by the Commission under the Atomic Energy Act of 1954 [42 U.S.C. 2011 et seq.] or by a State as permitted under section 274 of such Act [42 U.S.C. 2021] at which production of any uranium product from ores (other than from residual radioactive materials) takes place. This subsection does not prohibit the disposal of residual radioactive material from a processing site under this subchapter at a site licensed under title II or the expenditure of funds under this subchapter for such disposal.