VALVE-TYPE IMMERSED PULSING PUMP Russian patent published in 1997 - IPC

FIELD: nuclear power engineering for handling liquid radioactive pulse. SUBSTANCE: pump has pulsed-flow piping, admission and delivery ball valves, delivery piping installed in pulsed-flow chamber characterized in that it is placed in working space and that pulse is removed from under mother liquid layer. In addition, delivery valve with movable saddle is placed in shell whose cap is threaded and has guide bushings, as well as bellows carrying saddle; shell is mounted in top part of delivery piping located in servicing zone. Bottom pipe of delivery piping is placed at certain angle to vertical axis of admission valve ball; pulsed-flow piping communicates with working tank via piping and shut-off valve. EFFECT: provision for pump installation into working tank through existing passages and to desired depth, in-service washing of valves by detergents, and decontamination of pump prior to removing it from tank. 2 cl, 2 dwg