Patent ID: 8416911
Filing Date: 2013-04-09
Classification: G21C,G21D,Y02E

Abstract:
1. A nuclear steam supply system comprising: a containment enclosing a primary loop of the nuclear steam supply system within an interior thereof; a reactor vessel supported within a reactor well within a lower interior of the containment, the reactor well having walls that substantially surround a lower portion of the reactor vessel; a vertical shield wall that extends up from an upper portion of the reactor well walls and substantially encircles an upper portion of the reactor vessel and extends vertically above the reactor well substantially to an elevation of an operating deck; a missile shield capping a top of the vertical shield wall; and wherein the shield wall includes at least one air inlet door located along at least a portion of a lower section of the shield wall, the inlet door being configured to be normally closed during reactor operation, but is configured to be opened during an outage to enable cooling air flow along an interior of the shield wall, and an outlet door located along at least a portion of an upper section of the shield wail, below the operating deck, the outlet door being configured to be normally closed during, reactor operation, but is configured to be opened during an outage to enable cooling air flow along the interior of the shield wall.