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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Late News Poster Session
Presentation Title Thermokinetics and Interfacial Insight Into the U-Nb-O Nuclear Fuel System
Author(s) Emily E. Moore, Kwangnam Kim, Stephen Weitzner, Michelle Greenough, Adrian Gonzales, Hunter Henderson, Tien Roehling, Tae Wook Heo
On-Site Speaker (Planned) Emily E. Moore
Abstract Scope Thermodynamics, kinetics and chemical compatibility of metallic uranium, uranium alloy and oxide fuels to better understand the eIects of fission products and cladding materials is key to future generation reactors. Refractory metals, which exhibit excellent high temperature properties and corrosion resistance are of interest for both jet propulsion fuels systems and cladding materials, however their interactions with uranium in metal and oxide form are understudied. In this work we investigate thermodynamics of U-Nb alloy system and chemical compatibility in the form of phase stability and diIusion for the binary and ternary U-Nb-O system. We will explore interfacial interactions and provide insight from an atomistic perspective coupled to CALPHAD and experimental findings. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 and supported by LDRD-25-ER-005 LLNL-ABS-2012908
Proceedings Inclusion? Undecided
Keywords Nuclear Materials, Modeling and Simulation, Phase Transformations

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