Conference Tools for 2025 TMS Annual Meeting & Exhibition

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About this Abstract
Meeting	2025 TMS Annual Meeting & Exhibition
Symposium	Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title	Predicting the Variability in Performance of Zircaloy in Nuclear Reactors
Author(s)	Andrea Rovinelli, Jobin Joy, Anjana Talapatra, Laurent Capolungo
On-Site Speaker (Planned)	Andrea Rovinelli
Abstract Scope	Most of the nuclear reactor fleet is reaching the end of their design service life. Because design was conservative there is an opportunity and a drive to extend the operational life of the current fleet and/ to increase the fuel burn-up. Such endeavor is complex due to (i) the limited availability of creep and irradiation experiments under service conditions, and (ii) the epistemic uncertainty in the material microstructure. Physics-informed, modeling can help in determining the behavior of the material under conditions for which experiments are not available. In this work we use a physics-based and microstructure sensitive model that explicitly accounts for point defects diffusion, dislocation climb, dislocation glide, irradiation defects evolution to predict the mechanical response (e.g., tensile, creep) of Zircaloy 4. Leveraging the numerical efficiency of the polycrystal simulation code, we then quantify the performance variability of Zircaloy samples and components induced by variability in the material microstructure.
Proceedings Inclusion?	Planned:

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