| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Microstructural, Mechanical, and Chemical Behavior of Solid Nuclear Fuel and Fuel-Cladding Interface II
|
| Presentation Title |
Evaluating Effect of Layer Cracking And Interfacial Debonding on Triso Fission Product Diffusion and Thermomechanical Performance |
| Author(s) |
Ryan Sweet, Z. M. Krajewska, W. F. Skerjanc, J. A. Hirschhorn |
| On-Site Speaker (Planned) |
Ryan Sweet |
| Abstract Scope |
The safety advantage of TRISO fuel lies in it’s inherent ability to retain radionuclides due to its layered structure. Because of the manufacturing process, certain particles may be more likely to reach material failure limits and allow the release of fission products. To determine particle failure and damage extent in compacts, the detection and presence of certain fission products is used. This work is an effort to more accurately calculate fission product diffusion through the particle layers by integrating additional mechanistic effects. This includes layer cracking, which acts as a ‘short-circuit’ pathway for fission products through retentive layers, and debonding, which opens a gas gap that slows fission product diffusion but impacts layer thermal and mechanical performance. These mechanisms have been implemented into the BISON fuel performance code and are calibrated based on single-effects experiments (fracture strength, interfacial strength, etc.), while maintaining the statistical variation expected with particle failure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Modeling and Simulation, Composites |