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Vol.7 No.1previous AASP14 (87-88-89-90-91-92-93-94-95-96-97-
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Academic Articles
Regular Paper Vol.7 No.1 (2015) p.66 - p.73
 

Reconstruction of Grand Design for Fatigue Evaluation based on Fatigue Failure Analysis of Japanese NPPs

 
Takao NAKAMURA1, Ryosuke FUJIKAWA1, Mikiya MATSUSHITA1, Shigeki ABE1, Masayuki KAMAYA2
 

1 Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
2 Institute of Nuclear Safety System, Inc., 64 Sata, Mihama-cho, Mikata-gun, Fukui, 919-1205, Japan

 
Abstract

After Fukushima Daiichi NPP accident, the improvement of nuclear safety is highly requested in order to prevent re-occurrence of severe accident. New scheme of fatigue evaluation to confirm system safety in NPPs is enhanced to be established based on Defense in Depth concept. This study focuses on the direction to reconstruct Grand Design of fatigue evaluation to ensure system safety based on fatigue failure analysis of Japanese NPPs. The issues of fatigue evaluation we have now is investigated in order to review Grand Design on the basis of new role of fatigue management in plant long term safe operating scheme that is required after Fukushima daiichi NPP accident.

 

 
Keywords
defense in depth concept, environment assisted fatigue, fatigue evaluation, fatigue failure analysis, grand design, NUCIA (nuclear information archives), system safety, postulated crack growth curve
 
Full Paper: PDF EJAM Vol.7No.1 pp.66-73 "Reconstruction of Grand Design for Fatigue Evaluation based on Fatigue Failure Analysis of Japanese NPPs"
Article Information
Article history:
Received 24 October 2014
Accepted 13 March 2015