To easily take a sample along a nozzle weld zone and to properly restore the zone after sampling in a method and device for sampling a test piece is taken for diagnosis of remaing life of areas of various kinds of the nozzle weld zone, etc., in various structure used for a nuclear power plant and a thermal power plant, etc.
A part of a circumferential direction of the nozzle 02 welded to a main body is notched in a longitudinal direction by using an electrode of an electric discharge machining for longitudinal cut, and subsequently the nozzle 02 is notched in a circumferential direction along the boundary of the weld zone by using the electrode for an electric discharge machining for circumferential direction cut, the nozzle is cut off from the weld zone and the sampling is performed. Thereby, a proper sampling can be performed in a condition in which a trace after cutting off is easily restored.
NAGURA YASUMI
OGUCHI TSUTOMU
SATO SATOSHI
KAMEI HIROMASA
