Reactor pressure vessel used for boiling water nuclear reactor comprises collar fixed to bottom lid and internal reactor pump extending through opening

摘要

A reactor pressure vessel comprises a collar fixed to a bottom lid and an internal reactor pump (32) extending through an opening. The pump comprises a running wheel (52) and a diffuser (56) which has a housing (58) with an outer wall (60) and paddles and sealing rings arranged around an outer surface of the outer wall of the housing. A lateral bore extends through the outer wall. An Independent claim is also included for a flow measuring system for an internal pump in a boiling water nuclear reactor.