11:10 AM - 11:25 AM
[3F07] Evaluation of irradiation embrittlement of a harvested reactor pressure vessel material from a domestic PWR plant
(1) Investigation of solute atom cluster formation
Keywords:Reactor pressure vessel, Irradiation embrittlement, Harvested material, Solute atom cluster
Solute atom cluster formation of a harvested RPV material (A533B Cl.1, Cu 0.12wt.%, 2.9×1019 n/cm2) was investigated by 3D atom probe tomography. Cu rich solute atom clusters were observed and its volume fraction was within the data band of domestic surveillance specimen. Comparison with surveillance specimen of the same RPV revealed that both specimen had similar characteristics regarding solute atom cluster formation.