| 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 |
Dynamic System Sensitivity Analysis of Burnup Accelerated UO2 and Cr2O3 Doped UO2 Rodlet Fission Gas Release |
| Author(s) |
Ian Ferguson, Maxwell Kavanagh, Pierre-Clement Simon, Michael Tonks, Daniel Wachs, Tianyi Chen |
| On-Site Speaker (Planned) |
Ian Ferguson |
| Abstract Scope |
Understanding fission gas release (FGR) is key to quantifying fuel performance. Unfortunately, obtaining full scale experimental data is expensive and time consuming, which is why accelerated fuel qualification techniques like FAST and MiniFuel tests leverage scaled fuel rodlets (FRs). However, scaled rodlets may experience dissimilar FGR behavior compared to the prototypical case due to temporal acceleration and altered rodlet size. This work utilizes the fuel performance code BISON to simulate prototypical (5 mm radius) and scaled (2.5 mm radius), burnup-accelerated UO2 and Cr2O3-doped UO2 fuel rodlets (FR) at steady state (300 W/cm). Using Dynamical System Scaling (DSS), a sensitivity analysis is performed on grain growth, grain refinement, and diffusion coefficient to rank their contribution to FGR for prototypical and scaled rodlets, hence quantifying how key fission gas behavior mechanisms change with scaling. This work provides suggestions to improve experimental design of accelerated FGR tests for undoped and doped UO2. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Nuclear Materials, Other |