ANALYSIS OF THE TRANSIENT AND STEADY-STATE OPERATION OF A COUNTERCURRENT LIQUID-LIQUID SOLVENT-EXTRACTION PROCESS

The computer program SEPHIS has been developed to aid in determining optimum solvent extraction conditions for the reprocessing of nuclear power reactor fuels by the Purex method. The possible applications to inventory control for nuclear material safeguards, nuclear criticality analysis, and process analysis and control are of special interest. The method is also applicable to other countercurrent liquid-liquid solvent extraction processes that are characterized by rapid chemical kinetics, that may involve multiple solutes, and that are performed in conventional contacting equipment. © 1979, American Chemical Society. All rights reserved.