Overview of a draft of new maintenance standards

One of the topics on structural standards in Japan is the completion of a d raft of new maintenance standards which covers inservice inspection (ISI), flaw evaluation and repair procedures. This paper describes the background of Japan's current structural codes and standards, the necessity of introdu cing flaw evaluation, and the outline of the activities of developing the D raft of Maintenance Standards in the Japan Power Engineering Inspection Cor poration. The essential features of the Draft of Maintenance Standards for ISI, flaw evaluation, and repair technologies, respectively, and future act ivities for updating the Draft of Maintenance Standards are presented. (C) 2000 Elsevier Science S.A. All rights reserved.