Patent Number: 046844910
Section: abstract

A retaining assembly holds a nozzle seal in the nozzle of a nuclear steam generator vessel. The assembly includes two arcuate beams generally following the curvature of the vessel wall, one beam lying generally alongside the divider plate and the other extending diametrically across the nozzle seal and being coupled thereto. The outer ends of the beams are anchored to the outer edge of the tube sheet and have brace members which bear against the vessel wall. The inner walls of the beams are interconnected by a thrust assembly which bears against the divider plate and includes an adjustable jacking screw means for urging the beams against the tube sheet. The effective length of the beam coupled to the nozzle seal can be varied by selectively replaceable spacers.. A lightweight positioning assembly which simulates the beam coupled to the nozzle seal can be inserted preliminarily to couple to the nozzle seal and the tube sheet for predetermining the anchor position for the other beam and measuring the distance from a point on the positioner to the divider plate for determining the size spacer needed in the retaining assembly.