About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Accelerated Qualification of Nuclear Materials Integrating Experiments, Modeling, and Theories
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Presentation Title |
Dynamical System Analysis of Time-accelerated UO2 Fission-gas-release During Power Ramp Transients |
Author(s) |
Ian Ferguson, Tianyi Chen, Daniel Wachs, Charles Folsom, Anthony Cowan, Maxwell Kavanagh |
On-Site Speaker (Planned) |
Ian Ferguson |
Abstract Scope |
Accelerated fuel qualification and model validation are essential to the development of advanced fuel designs. This work examines 43 MWd/kg-U burnup time accelerated uranium dioxide fuel fission gas release (FGR) during power ramp transients. Two rods are power ramped from 0-37 kW/m, with one rod ramping 1.774 times faster. The Dynamical System Scaling (DSS) methodology verifies physical similitude between systems and revealed the initial dissimilarity between the slower and faster power ramps in FGR, which is attributed to different contributions to FGR from microstructural cracking. Cracking dissipates energy and degrades the thermal conductivity of the fuel. It is thus believed that analysis of the temporally-resolved thermal performance of the fuel rod will indicate the cracking activities to assist the determination of the separate contributions to FGR from diffusion and cracking mechanisms. DSS is further applied to experiment – (BISON) model synthesis to guide further experimental design and model development. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, |