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김완재(Wanjae Kim),박치용(Chi-yong Park),이경수(Kyoung-soo Lee),권종주(Jongjooh Kwon),김태룡(Tae-Ryoung Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, several sets of numerical calculation are performed to investigate geometric effects of main steam isolation valve components on valve’s structural integrity. In particular, stress distributions around valve’s stem neck are closely evaluated where a full scale rupture had occurred. Components of MSIV such as ring, stem, poppet are remodeled and stress calculation are followed to find major geometric effects from which stem neck rupture may have been initiated. Finally, Major geometric factors are indentified and their contribution to stress concentration are evaluated and then compared.