Interaction between metal fission products and TRISO coating materials: A study of chemical bonding and interdiffusion: 1st quarterly report, 2006

摘要

This project is devoted to an in-depth study of the chemical and electronic impact of metal fission products on the coating layers in TRISO nuclear fuel. In particular, there is a focus on the investigation of Pd, Cs, and Ag and their interface formation with SiC and carbon-based substrates. A variety of surface and near-surface bulk sensitive probes that investigate the occupied and unoccupied electronic states of the substrate and the metal overlayer have been utilized. By a controlled and stepwise deposition of the metal overlayer, it is possible to gain substantial insight into the formation of interfaces and their intermixing behavior.In the past quarter, there has been a focus on a detailed analysis and description of the Pd/SiC interface formation process.