REPAIRING METHOD OF PENETRATION NOZZLE, AND PLUG FOR NOZZLE PORT

摘要

PROBLEM TO BE SOLVED: To provide a repairing method of a nozzle section that can be repaired from outside, and to provide a plug for a nozzle port used for the repairing method. SOLUTION: The repairing method of a vessel section 1 is used when a welded part 1b between a nozzle port 1a provided in the vessel section 1 and a nozzle 2 inserted into the nozzle port 1a is present on the inner surface 1c in the vessel section 1. The repairing method comprises: a nozzle cutting/removing step for cutting the nozzle 2 between the inner surface 1c and the outer surface 1d of the vessel section 1 and removing the nozzle 2 projecting to the side of the cut outer surface 1d; a nozzle port plug insertion step for inserting a nozzle port plug 4 formed so that it blocks the nozzle port 1a after the removal from the side of the outer surface 1d; and a welding/junction step for welding and joining the vessel section 1 and the nozzle port plug 4 on the outer surface 1d. COPYRIGHT: (C)2007,JPO&INPIT