My guess is there is no commercial viability to reprocessing. Since the Carter days, we’ve choked off nuclear power, so it would be “Reprocess fuel for what reactors??”
Of course I think that's part of the rub preventing reprocessing...there are vested financial interests in the uranium supply business that would be hurt by an increased supply on the market. And I'm sure those very same interests have poured a great deal of money into politician's pockets to keep the status quo.