US 9,812,225 B2
Compact integral pressurized water nuclear reactor
John D. Malloy, Goode, VA (US); and Michael J. Edwards, Forest, VA (US)
Assigned to BWXT mPower, Inc., Charlotte, NC (US)
Filed by John D. Malloy, Goode, VA (US); and Michael J. Edwards, Forest, VA (US)
Filed on Apr. 13, 2011, as Appl. No. 13/85,527.
Prior Publication US 2012/0263270 A1, Oct. 18, 2012
Int. Cl. G21D 1/02 (2006.01); G21C 7/12 (2006.01); G21C 1/32 (2006.01); G21C 15/00 (2006.01); G21C 13/02 (2006.01); G21D 1/00 (2006.01)
CPC G21C 7/12 (2013.01) [G21C 1/326 (2013.01); G21C 13/02 (2013.01); G21C 15/00 (2013.01); G21D 1/006 (2013.01); Y02E 30/32 (2013.01); Y02E 30/39 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a pressurized water reactor (PWR) including:
a pressure vessel including a cylindrical side wall defining an external annular recess, the pressure vessel defining and a sealed volume containing primary coolant water,
a nuclear reactor core disposed in a lower portion of the pressure vessel and immersed in the primary coolant water, and
a control rod drive mechanism (CRDM) disposed in the pressure vessel above the nuclear reactor core and immersed in the primary coolant water; and
an annular steam generator disposed outside of and secured coaxially with the pressure vessel within the external annular recess, the annular steam generator including:
tubes having ends in fluid communication with the sealed volume of the pressure vessel so that the primary coolant water flows therethrough,
an annular wall being coaxial with the cylindrical side wall of the pressure vessel that together with the external annular recess of the pressure vessel defines an annular secondary coolant flow volume that is coaxial with the side wall of the pressure vessel, the annular secondary coolant flow volume containing the tubes and not being in fluid communication with the sealed volume of the pressure vessel, and
a feedwater inlet and a stream outlet in fluid communication with the secondary coolant flow volume.