公开(公告)号：US3723247A

公开(公告)日：1973-03-27

申请号：US3723247D

申请日：1969-09-15

Applicant: ASEA AB

Inventor： LEINE L

IPC: G21C1/08 ,  G21C15/243 ,  G21C15/24

CPC classification number: G21C15/243 ,  Y02E30/40

Abstract: In a boiling water reactor having coolant recirculation pumps installed within an annular space between the reactor pressure vessel and an internal core shroud, the pump motors are arranged outside the reactor pressure vessel, the pump shafts penetrate the bottom part of the reactor pressure vessel in vertical shaft bores and the pump impellers are surrounded by pump casings having curved flow passages. The pump casing s are rigidly attached either to the shaft bores or to the core shroud and flexibly sealed with respect to the core shroud or the shaft bores. The pump motors may be designed to operate in the reactor coolant and be enclosed in motor housing pressure vessels communicating with the reactor vessel.