Development of Reconstitution Technology for Surveillance Specimens in Japan Power Engineering and Inspection Corporation

Abstract

In order to establish reconstitution technology for the surveillance specimens of RPV steels, a project was started in 1996FY. We focus on a correlation between the reduction of absorbed energy and the interaction of heat affected zone (HAZ) and plastic zone, to establish applicable reconstitution conditions for Charpy specimens. The plastic zone width was estimated from the hardness distribution of the Charpy specimens, and then the correlation between the plastic zone width and absorbed energy was obtained. Within the limits of 100J, there was no reduction of absorbed energy for the Charpy specimens reconstituted with 10 mm insert length using surface a ctivated joining method (SAJ). By comparing the length of insert material with the sum of HAZ width and plastic zone width, it is clear that the interaction causes the reduction of absorbed energy. The applicable conditions of reconstituted Charpy specimens could be assessed by comparing the insert length with HAZ width + plastic zone width.