Patent ID: 7616728
Filing Date: 2009-11-10
Classification: G21C,Y02E,Y10T

Abstract:
1. A nuclear reactor lower internals shroud comprising: a top plate with a central axis and a peripheral end circumscribing the top plate; a plurality of jacking blocks attached to a top surface of the top plate spaced around and proximate the peripheral end, each jacking block having a threaded recess facing the peripheral end of the top plate and extending radially inward toward the central axis; a jacking screw for at least some of the jacking blocks, each jacking screw having a peripheral thread sized to mate with and be screwed within the threaded recess, with a distal end of the jacking screw extending radially outward over the peripheral end; and a plurality of alignment posts attached to the top plate, spaced around and proximate the peripheral end and extending upwardly from the top plate, wherein at least some of the alignment posts are threadedly engaged with a bumper having a distal end extending radially outward over the peripheral end.