About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
|
Presentation Title |
Assessment of Effective Elastic Constants of Irradiated U-10Mo Fuel Microstructures |
Author(s) |
Sourabh Bhagwan Kadambi, Larry K. Aagesen, Yongfeng Zhang, Benjamin W. Beeler |
On-Site Speaker (Planned) |
Sourabh Bhagwan Kadambi |
Abstract Scope |
Monolithic U-10Mo fuel undergoes significant microstructural changes during fuel burnup which degrades its mechanical properties. In this talk, we present results form a numerical method to assess the impact of the various microstructural features--grains, intragranular and intergranular Xe gas porosity--on the elastic stiffness tensor. Using the Multiphysics Object-Oriented Simulation Environment (MOOSE), experimentally-informed phase-field microstructures are combined with asymptotic expansion homogenization method to obtain effective elastic constants as a function of porosity and fission density. The results are verified and compared against analytical homogenization models. With this approach, elastic degradation in operating nuclear fuels can be quantified when the distributions of microstructural features are known from experimental characterization or rate-theory based models. We further develop an evolution model based on the virial equation of state for Xe gas and investigate the effect of porosity at the grain boundary faces and triple junctions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nuclear Materials, Modeling and Simulation, Mechanical Properties |