Recovery of actinides extracted by Truex solvent from high level waste using complexing agents I. Batch studies

This work deals with the batch studies on stripping of actinides extracted bq a mixture octyl(phenyl)-N,N-disolubutyl-carbamoylmethylphosphine oxide ( CMPO) and tri-n-butyl phosphate (TBP) in n-dodecane (Truex solvent) from si mulated high level waste (HLW) solution. The stripping of americium and plu tonium from acid-bearing CMPO-TBP mixture is carried our using a mixture of weak acid, weak bart and complexing agent as strippant. A mixture of formi c acid, hydrazine hydrate and citric acid appeared to be best suited for ef ficient stripping of americium and plutonium. With appropriate modification s in the concentration of individual constituents, this strippant can be us ed for the recovery of actinides from loaded Truex solvent with any acid co ntent.