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PUREX - Wikipedia PUREX is the de facto standard aqueous nuclear reprocessing method for the recovery of uranium and plutonium from used nuclear fuel (spent nuclear fuel, or irradiated nuclear fuel)
PUREX – RECYCLING METHOD - Foreningen Atomkraft Ja Tak When the solution is mixed with TBP, stable complex compounds are formed whereby uranium (U) and plutonium (Pu) are absorbed and separated from the fission products (Fp)
Used Nuclear Fuel Reprocessing - ICLN To separate plutonium from uranium, a reductant is added to the aqueous stream, reducing Pu(IV) to Pu(III), which is not soluble in the organic solvent and partitions to the aqueous phase while U(VI) remains in the solvent
Purex Process - an overview | ScienceDirect Topics The good extractability of nitrate complexes of UO 2 2 + and Pu 4+ coupled with the inextractability of fission products by TBP forms the main principle of the Purex process As Pu3+ is weakly extracted, further separation of uranium from plutonium is achieved by reducing Pu 4+ to Pu 3+, in which state it is stripped from the organic phase