Combined jet pump and internal pump rercirculation system

A recirculation system for driving reactor coolant water contained in an annular downcomer defined between a reactor pressure vessel and a reactor core spaced radially inwardly therefrom comprising:

• a jet pump disposed in said downcomer and having a suction inlet at a top end thereof for directly receiving from said downcomer a first portion of said coolant water, and an outlet at a bottom end thereof for discharging said coolant water pressurized by said jet pump;
• a reactor internal pump joined directly to said pressure vessel at an access nozzle thereof, said internal pump including:
• a housing sealingly joined to said access nozzle for containing said coolant water;
• an inlet channel extending through said housing in flow communication with said access nozzle for receiving from said pressure vessel a second portion of said coolant water;
• an impeller disposed in flow communication with said inlet channel for receiving and pressurizing said coolant water second portion;
• an outlet channel disposed in flow communication with said impeller for receiving therefrom said pressurized coolant water second portion;
• and
• an injector nozzle disposed in flow communication with said outlet channel and positioned above said jet pump inlet for injecting therein said pressurized coolant water second portion to drive said jet pump for effecting suction at said jet pump inlet for drawing said coolant water first portion therein.