|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Correlation of Fission Product Transport to Grain Boundary Character in Neutron Irradiated Tristructural Isotropic Coated Nuclear Fuel Particles
||Haiming Wen, Isabella J. van Rooyen
|On-Site Speaker (Planned)
For tristructural isotropic (TRISO) coated fuel particles, mechanisms by which fission products migrate across the SiC coating layer remain poorly understood. In this study, scanning transmission electron microscopy (STEM) coupled with energy dispersive X-ray spectroscopy (EDS) was performed to study the distribution and composition of fission products in the SiC layer of TRISO coated particles neutron irradiated at 1092 oC to 3.22 x 1025 n/m2 fast fluence, and grain orientation mapping in transmission electron microscopy (TEM) was performed to investigate the characters of grain boundaries (GBs) where fission product precipitates are located and also the characters of GBs where precipitates are not present. STEM-EDS, TEM and grain orientation mapping were performed on the same areas in the SiC layer. The distribution and composition of precipitates are correlated to the characters of the GBs where the precipitates are located. Ultimately, transport of fission product precipitates is correlated to specific GB characters.
||Planned: A print-only volume