Abstract: Arrangement for facilitating the start-up of not self-priming centrifugal mps for the pumping of radioactive liquids in a nuclear fuel reprocessing plant wherein radioactive liquid is pumped from a first to a second container through the container's top by means of transfer piping which includes a centrifugal pump having its suction side in communication with one container and its discharge side connected to a supply pipe leading to the other container. The supply pipe includes a pressurized air operated jet pump adapted to lift, during start-up, liquid from the container into the centrifugal pump which is then operated to pump the liquid from the one container to the other through the jet pump.

Abstract: Apparatus for extracting a dispersed phase from a moving mixed phase which ontains two substantially mutually insoluble liquids of different densities which form a dispersed phase and a continuous phase. The apparatus includes a pipe passing through the wall separating the mixed phase from its environment and having a funnel-shaped end which projects into the mixed phase and has a conical, inner wall. The funnel-shaped end presents an opening for capture of the dispersed phase, with the funnel shaped end being oriented such that the width or diameter of the opening is at right angles to the direction of movement of the dispersed phase.