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Guidelines on Environmental Fatigue Evaluation for LWR Component

[+] Author Affiliations
Takao Nakamura

Kansai Electric Power Company, Inc., Osaka, Japan

Itaru Saito

Mitsubishi Heavy Industries, Ltd., Kobe, Hyogo, Japan

Yasuhide Asada

Central Research Institute of Electric Power Industry, Tokyo, Japan

Paper No. PVP2003-1780, pp. 161-171; 11 pages
  • ASME 2003 Pressure Vessels and Piping Conference
  • Pressure Vessel and Piping Codes and Standards
  • Cleveland, Ohio, USA, July 20–24, 2003
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-1694-X
  • Copyright © 2003 by ASME


Japanese utilities and vendors have taken environmental effects on fatigue (EF) into consideration in the plant life management (PLM) activity of operating plants for several years. In Sep. 2000 MITI notified the utilities to adopt “The Guidelines for Evaluating Fatigue Initiation Life Reduction in LWR Environment (MITI guidelines)” for PLM evaluation of operating plants [1]. In April 2001, the study started to establish detailed procedures for EF evaluation and the committee was organized for developing detailed guidelines at Thermal and Nuclear Power Engineering Society (TENPES). The evaluation guidelines were completed and published as TENPES guidelines [2]. These guidelines proposed several practical options to apply fatigue life reduction factor for environmental effects (Fen) on actual operating plant fatigue evaluation.

Copyright © 2003 by ASME



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