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.
|ジャーナル||Transactions of the Korean Society of Mechanical Engineers, A|
|出版ステータス||Published - 2008 9 1|
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