Stress evaluation method of reinforced wall-thinned Class 2/3 nuclear pipes for structural integrity assessment

Jae Yoon Kim, Je Hoon Jang, Jin Ha Hwang, Yun Jae Kim

Research output: Contribution to journalArticlepeer-review

Abstract

When wall-thinning occurs in nuclear Class 2 and 3 pipes, reinforcement is typically applied rather than replacement. To analyze the structural integrity of reinforced wall-thinned pipe, stress analysis results using full 3-D FE analysis are not compatible to the design code equation, ASME BPVC Sec. III NC/ND-3650. Therefore, the efficient stress evaluation method for the reinforced wall-thinned pipe, compatible to the design code equation, needs to be developed. In this paper, stress evaluation methods for the reinforced wall-thinned pipe are proposed using the equivalent straight pipe concept. Furthermore, for fatigue analysis of the reinforced wall-thinned pipe, the stress intensification factor of reinforced wall-thinned pipe is presented using the structural stress method given in ASME BPVC Sec. VIII Div.2.

Original languageEnglish
JournalNuclear Engineering and Technology
DOIs
Publication statusAccepted/In press - 2023

Bibliographical note

Publisher Copyright:
© 2023 Korean Nuclear Society

Keywords

  • Class 2 and 3 nuclear piping
  • Equivalent pipe with the same stiffness
  • Reinforced wall-thinned pipe

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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