Abstract
Life assessment of high-temperature components in thermal power plants have become an important issue in Japan's power industry. Tokyo Electric Power Company (TEPCO), as well as other utility companies, manufacturers of power generating facilities, and related research organizations, is on the way of establishing systems or methods for life assessment. In this report, taking an example of TEPCO's system, an approach by numerical analysis is described first. Secondly, some examples of non-destructive evaluations which are used or under development in Japan, that is, plastic replication, hardness measurement, electric resistivity measurement, and electrochemical method are described. Finally some activities of Japanese organizations, such as the Iron and Steel Institute of Japan and the Japan Power Engineering and Inspection Corporation, for improving accuracy of these methods are mentioned.
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