Definīcija:(NucEng) Reactor fuel element which must be replaced due to (1) burn-up or depletion, (2) poisoning by fission fragments, (3) swelling and/or bursting. The fissile material is not exhausted and so-called spent fuel is normally subsequently reprocessed.
VVC izstrādātie vides zinātņu, zemes zinātņu un fiziskās ģeogrāfijas termini