| 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 |
Microstructurally Informed Modeling of Fragment Size in the BISON Fuel Performance Code |
| Author(s) |
Oliver Baldwin, Nathan Capps, Brian Wirth |
| On-Site Speaker (Planned) |
Oliver Baldwin |
| Abstract Scope |
Fuel fragmentation, relocation, and dispersal (FFRD) is a concern that must be addressed to increase burnup limits in light water reactors (LWRs). There is concern associated with fine fragmentation in high-burnup fuel during design basis accidents, particularly loss-of-coolant accidents (LOCAs). Effects of fuel fragmentation include fission gas release, fuel relocation, and dispersal. This presentation describes our recent work to develop a model describing the size distribution of fragments formed during a temperature transient based on the available experimental data from simulated LOCA testing. The fragment size distribution model will be developed using microstructural and stress state calculations performed in the BISON fuel performance code. The predicted fragment size distribution is then used to calculate the fuel mass redistribution. This model has been implemented in BISON in combination with existing models for fuel relocation and dispersal. Predictions of fuel mass dispersal will be compared to experimental data outside the fitting database. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Nuclear Materials, |