Small diameter bore pressure vessel penetration modification
OwnerRonal Payne, Dave Waskey +1inventors
InventorsRonal Payne, Dave Waskey, Stephen Rapiejko
Life of this patent
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Abstract
The present invention discloses a system for repairing small internal diameter (1.24 in. or less) Inconel 600 bottom mounted nozzles on reactor pressure vessels. The system enlarges the original small diameter nozzle bore to a larger size and ads a larger ID Inconel 600 replacement nozzle therein which allows IDST weld tooling to be inserted to weld the replacement nozzle to thereactor vessel. An Inconel 600 sleeve of the original small ID tubing is inserted in the replacement nozzle and welded to the replacement nozzle to restore the operability of the original tube.
Claims6
A method of repairing a small diameter reactor vessel mounted nozzle using internally located weld tooling comprising the steps of:
- machining the original nozzle to form an opening in the reactor vessel having an ID larger than the OD of the original nozzle;
- inserting a replacement tube into the machined opening having aN ID sufficient to allow internally located welding machinery therein;
- welding the replacement tube to the reactor vessel material;
- inserting a new small diameter nozzzle having an ID identical to the original nozzle in the welded replacement tube;
- and
- welding the new nozzle to the replacement tube to restore the operability of the original nozzle.
Dependencies are inferred from the claim text.