Reprocessed uranium .28RepU.29 Enriched uranium
reprocessed uranium (repu) product of nuclear fuel cycles involving nuclear reprocessing of spent fuel. repu recovered light water reactor (lwr) spent fuel typically contains more u-235 natural uranium, , therefore used fuel reactors customarily use natural uranium fuel, such candu reactors. contains undesirable isotope uranium-236, undergoes neutron capture, wasting neutrons (and requiring higher u-235 enrichment) , creating neptunium-237, 1 of more mobile , troublesome radionuclides in deep geological repository disposal of nuclear waste.
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