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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Thermal Property Characterization, Modeling, and Theory in Extreme Environments
Presentation Title Thermal Transport Behavior of U-50Zr at the Mesoscale: Before and After Irradiation
Author(s) Zilong Hua, Tiankai Yao, Amey Khanolkar, Cody Dennett, Xiaxin Ding, Krzysztof Gofryk, Michael Benson, Lingfeng He, Jian Gan, David Hurley
On-Site Speaker (Planned) Zilong Hua
Abstract Scope The U-Zr based metallic fuel is a promising candidate for the next generation of fast reactors. Accurate knowledge of thermal conductivity degradation under irradiation is key to understanding microstructural evolution and fuel performance. It is thus necessary to investigate thermal transport on the scale of damage accumulation. In this talk, recent research results of intragranular thermal conductivity in three U-50Zr phases, γ-, ω-, and δ-, and the influence of ion-irradiation, are reported. Our results reveal that different microstructures associated with the three phases are explicitly reflected in the thermal transport behavior of the pristine samples. Specifically, the hexagonal δ-phase shows significant thermal anisotropy. After irradiation, the thermal transport behavior of the three U-50Zr samples changes significantly. Transmission electron microscopy is used to understand the impact of irradiation microstructure on thermal conductivity. These new insights are expected to aid in fuel performance modeling and fuel design.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

First-principles modeling of High Temperature Irradiation Resistant Thermocouple (HTIR-TC) Performance and Oxidation
A Thermodynamically-consistent Model for Heat Transport in Heterogeneous Solids
An Experimentally Validated Mesoscale Model for the Effective Thermal Conductivity of U-Zr Fuels
Atmosphere Controlled Thermogravimetric Analysis as a tool to Screen, Test and Qualify Advanced Fuels under Extreme Conditions
Connection Between Thermal Conductivity Degradation and Microstructural Changes in Graphite Due to Neutron Irradiation
Defect density and annealing kinetics estimation using thermal diffusivity measurements from Transient Grating Spectroscopy
Energy Balance Investigation of Close-coupled Optimized-pressure Gas Atomization Pour-tube Design Geometry to Prevent Melt Freeze-off
Enhanced thermal conductivity for sol-gel derived fuel candidates
From crystalline to amorphous materials: mechanisms for thermal conductivity reduction
Ion-irradiation-induced structural disorder and thermal conductivity changes of intermetallic compounds.
Measurement of density, thermal expansion, and viscosity of volatile molten salts using X-ray radiography
Mesoscale Modeling of the Effective Thermal Conductivity of a UO2-Mo Composite Nuclear Fuel
Multiphysics Mesoscale Modeling of Ablative Thermal Protection Systems
Non-magnetic Kondo effect in delta-UZr2
Oxidation Resistance Impact of Niobium and Zirconium Additions to U3Si2
Performance of UO2 reactor fuel with high thermal conductivity additives
Phase-dictated thermal conductivity response in carbon systems exposed to ion irradiation
Phonon transport in ThO2 from neutron scattering and first-principles computation
Theory of non-equilibrium thermal transport at high temperatures from first-principles.
Thermal and mechanical properties of hafnon (HfSiO4), theory and experiments
Thermal behaviors of correlated insulators ThO2 and SmB6
Thermal conductivity and heat transport processes of ion irradiated and laser heated solids
Thermal Conductivity Degradation from Irradiation-induced Microstructural Defects in Single Crystal Thorium Dioxide
Thermal gradient effect on the transport properties of helium and intrinsic defects in tungsten
Thermal Resistance at a Twist Interface: Dislocation Grid and Misorientation Phonon Scattering
Thermal stability of metallic multilayers with triple junctions
Thermal Transport Behavior of U-50Zr at the Mesoscale: Before and After Irradiation
Thermal Transport in Irradiated ThO2: A Combined Experimental and Phonon Level Investigation
Ultra-high lattice thermal conductivity and the effect of pressure in superhard hexagonal BC2N

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