Why isn the U.S. reprocessing?
A. The Carter Administration decided not to reprocess nominally on the grounds that if other countries could be persuaded not to reprocess, the likelihood of nuclear proliferation would be reduced. So far as I know, not one other country has been persuaded, because the economic advantages of reprocessing are so great. The Reagan and Bush Administrations wanted to reprocess, but it would have been politically expensive so they temporized.