| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2024: Process-Structure-Property Relations and New Technologies
|
| Presentation Title |
Al and Cr Induced Defects Characterization in UO2 Doped Systems Using XAS and Neutron Scattering |
| Author(s) |
Arjen van Veelen, Joshua T. White, Scarlett Widgeon Paisner, Adrien J. E. Terricabras, Tarik Saleh |
| On-Site Speaker (Planned) |
Arjen van Veelen |
| Abstract Scope |
Uranium dioxide (UO2) fuel powers commercial light water reactors. Dopants enhances fuel performance and stability by increasing microstructure, in particular grain size, improving both creep and fission gas release behavior. Cr dopants has been recognized to enhance grain growth, which increases grainsizes from ~15 (± 2 µm) to 28-41 (± 4 µm) through the incorporation of defects and liquid secondary phases. Understanding the structure and formation of defects are important for the development of fission gas models. We used state-of-the-art synchrotron X-ray Absorption Spectroscopy and X-ray and Neutron Diffraction to study the defect structures of Cr-doped, Al-doped and undoped UO2. Our results suggest that particularly Cr dissolution into UO2 is strongly dependent on concentration, temperature, and oxygen potential during sintering, impacting the defect structure of UO2. We will discuss both Al and Cr dopant chemistry in relation to its effects on the UO2 defect chemistry important to fission gas modeling. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Nuclear Materials, Other |