Abstract
Separation and decontamination factors for three steps of an extraction process, i.e., extraction, scrubbing, and stripping, as well as an overall decontamination factor for the extraction process as a whole are defined to show the separation efficiency in the process. The equations are derived between these factors and experimental values such as distribution ratios, scrubbing percents, and stripping percents. The equations are applied to the separation of fission products/uranium with tributyl phosphate (TBP) and seven alkyl amines irradiated to the extent of 10/sup 8/ r, in order to follow the radiation effect on separation and decontamination factors. Decontamination factors decrease with increasing dosage in the TBP system, whereas they increase in most amine systems. N-cyclohexyl dilauryl amine and TBP are the best for the decontamination among unirradiated extractants. Amberlite LA-2 is the best among the irradiated. In most cases a scrubbing step is more important than an extraction step as far as the decontamination of fission products/uranium is concerned. (auth)
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