| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Elucidating Microstructural Evolution Under Extreme Environments
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| Presentation Title |
Fission Gas and Dopant Diffusion in Sol-Gel Synthesized UO2
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| Author(s) |
John Michael Proctor, Amir Azizi, Jordan Brown, Oran Lori, Xizheng Wang, Shen Dillon, Sarah Finkeldei |
| On-Site Speaker (Planned) |
John Michael Proctor |
| Abstract Scope |
Doped UO2 is a suggested advanced fuel form for use in current and future nuclear reactors. Ultrafast high-temperature sintering is a new technique that decreases the sintering time for oxides from hours to minutes. Utilization of this technology for the synthesis of doped oxides is promising regarding the increased throughput and retention of dopants that during conventional sintering are prone to sublimation. The chemical and morphological properties of surrogate and doped UO2 ceramics synthesized by rapid sintering have not previously been explored. In addition, samples containing additives with large neutron capture cross sections, such as boron-10, were irradiated at UCI’s TRIGA reactor to generate fission gas surrogates. Gas diffusion coefficients will be determined via observation of Ostwald ripening of bubbles during in-situ heating via TEM. This study will improve our understanding of diffusion in fluorite systems, as well as allow for future tuning of doped UO2 synthesis. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Ceramics, |