Presentation Information
[3B08]Study on Residual Stress Mitigation in Lid Welds of Radioactive Waste Disposal ContainersA Non-Thermal Approach Using Milling and Burnishing Processes
*Noriyuki Maruyama1, Kazumichi Uedoi2, Osamu Kato2 (1. Radioactive Waste Management Funding and Research Center, 2. Kobe Steel, Ltd.)
Keywords:
Lid weld,Residual stress,Milling,Burnishing,Stress corrosion cracking (SCC)
In this study, the effectiveness of a non-thermal residual stress mitigation method, which combines milling and burnishing processes, was evaluated for the lid welds of radioactive waste disposal containers, including TRU waste packages. Machining trials and residual stress measurements using welded test specimens enabled the identification of machining stability, surface quality, and depth-dependent residual stress characteristics. Numerical analyses further clarified the trend of stress redistribution associated with the machining processes. Based on these findings, technical knowledge was organized regarding the introduction of compressive residual stress and the optimization of processing conditions, with a view toward practical application.