About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Radiation Effects in Metals and Ceramics
|
Presentation Title |
Neutron Irradiation Induced Intergranular Fission Product Precipitation in SiC Layer of TRISO Fuel |
Author(s) |
Isabella J. Van Rooyen, Subhashish Meher, Thomas Lillo |
On-Site Speaker (Planned) |
Isabella J. Van Rooyen |
Abstract Scope |
Understanding of fission product behavior within tristructural isotropic (TRISO) layers, especially Ag-110m, due to its high mobility in intact TRISO layers, in the SiC layer during neutron irradiation is explored as part of the post irradiation examination of the Advanced Gas Reactor (AGR) irradiation campaign. This presentation provides selected results of SiC intergranular fission product precipitation in selected TRISO coated particles from the AGR-1 and AGR-2 experiments, and microstructural trends considering differences in fuel types, fabrication histories and irradiation histories. The complexity of fission product distribution and composition within the SiC layer, irradiation effects on the SiC structure as well as the variable nature of metallic fission product release, is examined by advanced characterization techniques such precession electron diffraction, scanning transmission electron microscopy, and atom probe tomography. Preliminary results suggest that CSL-related grain boundaries may have a direct influence on Ag retention. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |