About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Radiation Effects in Metals and Ceramics
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Presentation Title |
Three Dimensional Radiation Effects in Neutron Irradiated Uranium-Molybdenum Fuel |
Author(s) |
Maria A. Okuniewski, Alejandro Figueroa, Jonova Thomas, Sri Tapaswi Nori, Peter Kenesei, Jonathan Almer |
On-Site Speaker (Planned) |
Maria A. Okuniewski |
Abstract Scope |
Uranium-molybdenum (UMo) fuels are candidate fuels for research and test reactors, as well as for advanced reactors. During neutron irradiation these fuels experience swelling, phase transformations, interactions with the cladding, and recrystallization. Synchrotron micro-computed tomography and high-energy diffraction microscopy were used to three-dimensionally characterize a monolithic UMo fuel plate irradiated to ~ 5x1021 fissions/cc. Two specimens were extracted from the plate, one of which incorporated a zirconium diffusion barrier and fuel, whereas the other specimen possessed only fuel. These techniques indicated a variety of pore morphologies within the fuel resulting from fuel swelling, from newly nucleated pores to interconnected porosity. The interaction region also demonstrated the presence of porosity. Additionally, multiple specimens were extracted from an edge-on irradiated fuel plate that was irradiated to ~6-10x1021 fissions/cc and characterized via scanning electron microscopy to reveal porosity, phases, and grain morphology. The microstructures for the range of burn-ups will be compared. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |