Bwxt Mpower, Inc.

Sean M Boyle

John Dexter Malloy, Iii

James Brian Inman

Matthew W Ales

Ronald C Watson

Billy E Bingham

Jason G Williams

John D Malloy

Jason G William

James B Inman

John D Iii Malloy

In a pressurized water reactor (PWR), emergency core cooling (ECC) responds to depressurization due to a vessel penetration break at the top of the pressure vessel by draining water from a body of water through an injection line into the pressure vessel. A barrier operates concurrently with the ECC to suppress flow of liquid water from the pressure vessel out the vessel penetration break. The barrier may comprise one or more of: (1) an injection line extension passing through the central riser to drain water into the central riser; (2) openings in a lower portion of a central riser to shunt some upward flow from the central riser into a lower portion of the downcomer annulus; and (3) a surge line providing fluid communication between a pressurizer volume at the top of the pressure vessel and the remainder of the pressure vessel which directs water outboard toward the downcomer annulus.

Passive techniques for long-term reactor cooling

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Charlotte, NC, United States of America

Sean M Boyle