About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2025
|
| Presentation Title |
Development and Validation of UO2 Fission Gas Behavior Modeling Capabilities in BISON |
| Author(s) |
Pierre-Clement A. Simon, Larry K. Aagesen, David Andersson, Sudipta Biswas, Nathan Capps, Michael Cooper, Conor Galvin, Kyle Gamble, Stephen Novascone |
| On-Site Speaker (Planned) |
Pierre-Clement A. Simon |
| Abstract Scope |
The fission of nuclear fuel generates noble gases, such as Xenon (Xe) and Krypton (Kr), which significantly impact fuel performance by affecting thermal conductivity, causing fuel swelling, cracking, and pellet-cladding interactions. The Simple Integrated Fission Gas Release and Swelling (Sifgrs) model, implemented within the BISON fuel performance code, employs a mechanistic approach to simulate fission gas behavior through intragranular and intergranular gas transport and eventual release. This presentation will discuss the development and validation of UO2 fission gas behavior modeling capabilities within Sifgrs based on the BISON assessment cases and experimental data at high burnups. This comprehensive validation effort under normal and transient conditions, and at low and high burnup ensures the reliability of the models and identifies modeling gaps and data needs.
New developments include a new microcracking model for burst fission gas release, and an extension to high burnup by linking microstructure evolution to fission gas behavior. These efforts all use a multiscale, mechanistic approach, combining simulations at atomistic, mesoscale, and engineering scales to derive predictive modeling that better capture irradiation history and fuel performance when experimental data is too scarce or scattered to develop an empirical model. The new models will be presented, compared to empirical counterparts and experimental data, and discussed. The presentation will give an overview of current capabilities and an appreciation for the ongoing work being done in the Nuclear Energy Advanced Modeling and Simulation (NEAMS) program to support current industry needs. |
| Proceedings Inclusion? |
Undecided |