|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Microstructural, Mechanical and Chemical Behavior of Solid Nuclear Fuel and Fuel-cladding Interface
||Modeling Fission Gas Release Behavior from Microcracking and Thermal Diffusion at High Burnup in UO2 Fuel in BISON
||Oliver Baldwin, Walter Brinkley, Jonathan Norman, Nathan Capps, Brian Wirth
|On-Site Speaker (Planned)
Fission gas release (FGR) is a behavior of interest for fuel performance modeling, particularly at high burnup. High burnup fuels exposed to a temperature transient exhibit a burst release mechanism of this accumulated fission gas. Burst release of fission gas is attributed to micro-cracking and interconnecting between fission gas bubbles and ultimately extensive fuel fragmentation. The finite element fuel performance code, BISON calculates fission gas release through a module referred to as Sifgrs (Simple Integration Fission Gas Release and Swelling). This module contains a combination of mechanistic and empirical models describing the fission gas behavior in UO2 fuel. Additional high burnup transient fission gas release data has been acquired and was used to improve the micro-cracking correlation. This model will be implemented as a new empirical model in BISON to account for high burnup fission gas release mechanisms.
||Modeling and Simulation, Nuclear Materials,