CMPO-TRUEX Process and its Application in the Separation of Actinides from High-Level Liquid Wastes

Abstract

Basic studies have been carried out on the high active PUREX raffinate to determine the distribution characteristics of actinides in different extraction systems. The data have been utilised in conducting a series of counter-current extraction experiments, which have led to the establishment of a viable flow-sheet based on a unique PNC salt-free process, that has great potential in minimizing secondary radioactive waste generation. The process was successfully applied to the present purex system, and a decontamination factor DFαof > 10³ has been achieved resulting in the formation of a much less toxic HLLW.

NMR studies carried out on the Ln Complex extracts have yielded valuable data on their thernio chemical and activation parameters. Consideration on the mechanism of degradation/regeneration/decomposition of TRUEX Solvents are also included.