SEALING COLD LEG NOZZLES OF NUCLEAR REACTOR PRESSURE VESSELS

摘要

Cold leg nozzles (32) of a nuclear reactor pressure vessel are sealed during plant outages for reactor vessel inspection and core support maintenance by inserting a sealing plug (20) into each of the cold leg nozzle (32) by means of an installation tool (16) suspended within the vessel, to permit drainage of downstream piping and inspection and maintenance of associated steam generators and pumps.