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Academic Articles
Regular Paper (Contributed) Vol.2 (2010) p.82 - p.100
 

Environmental Fatigue Evaluation in PLM Activities of PWR plant

 
Takao NAKAMURA 1and Shoichi MIYAMA2
 
1 Osaka University, 2-1 Yamadaoka, Suita-city, Osaka 565-0871, Japan
2 The Kansai Electric Power Co., Inc. 8 Yokota, 13 Go-shi, Mihama-cho, Mikata-gun, Fukui, 919-1141 Japan
 
Abstract
Numbers of nuclear power plants have been operating for more than 30 years and some of them exceeding 40 years in Japan. In these ageing plants, fatigue evaluation has a significant measure in assuring the plant reliability. The environmental fatigue in light water reactors, which was first recognized in the 1980’s in Japan, has been drawing attention worldwide because it may cause remarkable effects on the life of important components. The Japanese nuclear industries developed the world’s first practical methodology to evaluate environmental fatigue and it has been utilized in plant life management (PLM) technical evaluation. The Japan Society of Mechanical Engineers (JSME) issued the codes regarding environmental fatigue, JSME S NF1-2006, and has redrafted them incorporating the latest knowledge in 2009. This paper introduces a few examples of environmental fatigue evaluation, which was performed using the JSME codes as a part of PLM evaluation for Japanese PWR plant.
 
Keywords
Environmental Fatigue, Environmental Fatigue Life Correction Factor, Fen, JSME Codes, Modified Rate Approach Method, Plant Life Management
 
Full Paper: PDF EJAM Vol.2 pp.82-100 "Environmental Fatigue Evaluation in PLM Activities of PWR plant"
Article Information
Article history:
Received 18 May 2010
Accepted 31 August 2010