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Fatigue Evaluation of RCS Branch Line for License Renewal Application

[+] Author Affiliations
Il-Kwun Nam, Hagki Youm, Tae Eun Jin

Korea Power Engineering Company, Inc., Gyeonggi-do, Korea

Byung Sup Kim

Korea Hydro and Nuclear Power Company, Inc., Daejeon-shi, Korea

Paper No. ICONE14-89355, pp. 169-174; 6 pages
doi:10.1115/ICONE14-89355
From:
  • 14th International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance and Life Cycle; Component Reliability and Materials Issues; Codes, Standards, Licensing and Regulatory Issues; Fuel Cycle and High Level Waste Management
  • Miami, Florida, USA, July 17–20, 2006
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4242-8 | eISBN: 0-7918-3783-1
  • Copyright © 2006 by ASME

abstract

The fatigue effects have to be revaluated in preparing the license renewal application for the continued operation of an old vintage nuclear power plant. This paper presents a complete fatigue analysis for a branch piping with the effect of thermal stratification, induced by turbulent penetration, and environmental factors on fatigue. Three-dimensional computational fluid dynamics and finite element analyses were performed for the branch line to evaluate the thermal stratification loading. Proposed is a supplementary methodology of considering the effect of environmental factor on the combined conventional peak stress intensity range, based on the NB-3600 of ASME Section III Code, with thermal stratification loading. It can be used for safety enhancement of old vintage nuclear power plants.

Copyright © 2006 by ASME

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