Method for repairing vertical welds in a boiling water reactor shroud using a clamp with eccentric pins

摘要

A method of repairing a crack in a boiling water reactor shroud with a clamp having pins eccentrically mounted on disks connected by a structural member includes inserting the pins into openings formed in the shroud on opposite sides of the weld and turning the disks to rotate the pins toward the weld such that edges of the holes are engaged by the pins to transmit loads from the shroud to the structural member rather than the weld. A locking mechanism using set screws can be used to lock the disks in a desired rotational position relative to the clamp.