About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
|
Presentation Title |
Neutron Irradiation Damage and Fission Product Transport in the SiC Layer of TRISO Fuel Particles |
Author(s) |
Subhashish Meher, Isabella van Rooyen, Chao Jiang |
On-Site Speaker (Planned) |
Subhashish Meher |
Abstract Scope |
It has been recently discovered that the precipitation of intragranular palladium-containing fission products in the SiC layer of neutron-irradiated tristructural isotropic (TRISO) fuel particles possibly occurs via a novel dual-step nucleation mechanism. Direct observations of Pd silicide imprinting into morphological templates of α-SiC precipitates in neutron-irradiated SiC layer of TRISO fuel will be discussed, with examples from selected particles from both the Advanced Gas Reactor (AGR)-1 and AGR-2 fuel irradiation experiments. The physical understanding of intragranular fission product precipitation has been studied by both advanced microscopy and first principle calculations. Along with this, the large-scale precipitates of fission products at IPyC layer, and grain boundaries of SiC have been found to be constituted of separate regions of fission products. |
Proceedings Inclusion? |
Undecided |