炭素鋼配管の軸方向き裂の延性進展抵抗(OS6-2 配管の欠陥評価,OS6 エネルギー機器の維持管理と健全性評価)

Abstract

It is very important to develop a simplified flaw evaluation method that can be applied to carbon steel pipes with an axial flaw under the elastic-plastic fracture mode, since the JSME fitness for services code does not contain such a technique. So, this paper makes clear the ductile fracture resistance, J-R curves of an axial crack in STS410 carbon steel pipes commonly used in the primary loops of boiling water reactor plants, and derives the Z-factor for axial flaw evaluation based on the failure assessment diagram approach.