reprocess

Short definition from Wiktionary

Verb

1. 1
   To process again.
2. 2
   To process again: To extract the fissile material (mainly uranium and plutonium) remaining in spent nuclear reactor fuel, allowing it to be recycled into fresh nuclear fuel or (for plutonium and/or uranium-233 from some specialized breeder reactors) used to build nuclear weapons; may also extend to recovering nonfissile but fertile elements remaining in spent reactor fuel (such as thorium), or pre