Study on The Primary Stress Limits of Aseismic Evaluation for NPP Piping

(Part.2:Influence of internal pressure)

Abstract

Based on previous studies, only prevention of the fatigue damage was required as permission for the S class piping in the service condition Ds, and the primary stress limit for the purpose of the prevention of the plastic collapse was actually abolished in the JEAC4601-2008. In this study, the necessity of the stress limit for plastic collapse due to seismic load was examined.