Study of weld residual stress field in the girth seam H6a of core shroud of boiling water reactor

BWR炉心シュラウドのH6a溶接部における残留応力の研究

Li, Y.; 加治 芳行  ; 五十嵐 誉廣  

Li, Y.; Kaji, Yoshiyuki; Igarashi, Takahiro

The heat affected zone (HAZ) of the girth seams of the core shroud is sensitive to the stress corrosion cracking due to neutron irradiation, corrosion and residual stress. We are focusing on the weld residual stress field around the girth seam H6a. The stress analysis adopted different approaches in ABAQUS to simulate the multiple-bead welding process. The Fully Coupled Temperature-Displacement Analysis (FCTDA) gave the much accurate results as compared with the experimental results. The axial stress fields in the crossing section of the wall of the core shroud were also clarified.