| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Microstructural, Mechanical, and Chemical Behavior of Solid Nuclear Fuel and Fuel-Cladding Interface II
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| Presentation Title |
Microstructural Impacts of Dopants in Advanced Nuclear Fuels |
| Author(s) |
Maria Kosmidou, Adrien J. Terricabras, Meagan D. Wheeler, John M. Proctor, Scarlett Widgeon Paisner, Sarah C. Finkeldei, Joshua T. White |
| On-Site Speaker (Planned) |
Maria Kosmidou |
| Abstract Scope |
Doped UO2 has been investigated as one of the most feasible systems for the near-term development of accident tolerant fuels(ATF). Despite numerous advantages (improved sinterability, grain size increase, reduction of released fission gases), the operating mechanisms of those additives in UO2 remain not fully understood. In depth studies of the behaviour of dopants at grain boundary and in the UO2 lattice is needed for the development of accurate models and better understanding of ATF. This work was focused on Al, Si, and Cr-doped UO2 samples and a variety of dopant concentration was targeted, both above and below the solubility limit. Traditional powder mixing, and sol-gel methods were compared. Inductively Coupled Plasma Optical Emission spectroscopy was used to determine dopant concentration post sintering. Advanced transmission electron microscopy-based techniques were conducted to visualize and quantitatively analyse dopant distribution within samples and at grain boundaries. Nanomechanical testing was also accomplished on all samples. |
| Proceedings Inclusion? |
Planned: |