Sensitivity analyses of finite element method for estimating residual stress of dissimilar metal multi-pass weldment in nuclear power plant

Tae Kwang Song, Hong Yeol Bae, Yun Jae Kim, Kyoung Soo Lee, Chi Yong Park

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In nuclear power plants, ferritic low alloy steel components were connected with austenitic stainless steel piping system through alloy 82/ 182 butt weld. There have been incidents recently where cracking has been observed in the dissimilar metal weld. Alloy 82/182 is susceptible to primary water stress corrosion cracking. Weld-induced residual stress is main factor for crack growth. Therefore exact estimation of residual stress is important for reliable operating. This paper presents residual stress computation performed by 6" safety & relief nozzle. Based on 2 dimensional and 3 dimensional finite element analyses, effect of welding variables on residual stress variation is estimated for sensitivity analysis.

Original languageEnglish
Pages (from-to)770-781
Number of pages12
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume32
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1
Externally publishedYes

Keywords

  • Dissimilar metal weld
  • PWSCC
  • Residual stress
  • Sensitivity analysis

ASJC Scopus subject areas

  • Mechanical Engineering

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