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http://dx.doi.org/10.3795/KSME-A.2008.32.8.668

Estimation of Residual Stress Distribution for Pressurizer Nozzle of Kori Nuclear Power Plant Considering Safe End  

Song, Tae-Kwang (고려대학교 대학원 기계공학과)
Bae, Hong-Yeol (고려대학교 대학원 기계공학과)
Chun, Yun-Bae (고려대학교 대학원 기계공학과)
Oh, Chang-Young (고려대학교 대학원 기계공학과)
Kim, Yun-Jae (고려대학교 기계공학과)
Lee, Kyoung-Soo (한전 전력연구원)
Park, Chi-Yong (한전 전력연구원)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.32, no.8, 2008 , pp. 668-677 More about this Journal
Abstract
In nuclear power plants, ferritic low alloy steel nozzle was connected with austenitic stainless steel piping system through alloy 82/182 butt weld. Accurate estimation of residual stress for weldment is important in the sense that alloy 82/182 is susceptible to stress corrosion cracking. There are many results which predict residual stress distribution for alloy 82/182 weld between nozzle and pipe. However, nozzle and piping system usually connected through safe end which has short length. In this paper, residual stress distribution for pressurizer nozzle of Kori nuclear power plant was predicted using FE analysis, which consideded safe end. As a result, existing residual stress profile was redistributed and residual stress of inner surface was decreased specially. It means that safe end should be considered to reduce conservatism when estimating the piping system.
Keywords
Residual Stress; Dissimilar Metal Weld; PWSCC; Safe End;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 8
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