Development of a ten-stage mixer-settler for U235 solutions, Part 2

Abstract

Experimental work on a ten-stage mixer-settler is described. This includes the effects of impeller position and flow rate on its operation and the inactive extraction efficiency under conditions, such as are expected in the reprocessing of HIFAR fuel elements. Equilibrium data were determined for the systems used and a method for interface detection over a wide range of solution concentration developed. The mixer-settlers designed have been shown to be hydrodynamically practicable. It was found that interface height is controlled satisfactorily by correct positioning of the impeller above the mixer base and that the pump mix type of impeller recommended elsewhere is not essential.