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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Ceramic Materials for Nuclear Energy Research and Applications
Presentation Title Irradiation- and Dopant-induced Structural Changes in Ceramic Nuclear Fuels Probed via Elastic and Optical Properties
Author(s) Amey Rajendra Khanolkar, Linu Malakkal, Zilong Hua, Cody Dennett, J. Matthew Mann, Marat Khafizov, David Hurley
On-Site Speaker (Planned) Amey Rajendra Khanolkar
Abstract Scope Radiation-induced defects and dopants are known to introduce lattice distortions that influence the thermophysical properties of nuclear fuels. A fundamental understanding of their impact on fuel performance is therefore critical for the development of advanced ceramic fuels. In this talk, the impact of small-scale lattice defects and doped uranium atoms on the optical and elastic properties of thorium dioxide (ThO2) single crystals is explored. Changes in optical properties of the irradiated ThO2 (created by color centers) and doped UxTh1-xO2 single crystals (created by band gap changes) are measured using spectroscopic ellipsometry and single wavelength reflectometry, respectively. Elastic property changes arising from defect- and dopant-induced lattice distortions are probed from changes in the frequency of laser-generated surface acoustic waves and longitudinal coherent acoustic phonons, respectively. When combined with ab initio calculations, our findings provide new insight on the impact of atomic-scale lattice distortions on the properties of advanced ceramic fuels.
Proceedings Inclusion? Planned:
Keywords Ceramics, Nuclear Materials, Characterization

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advanced Characterization and Modeling of Nanoprecipitates in Spent Nuclear Fuel
Atomic Scale Simulation of Amorphous Intergranular Films in Nuclear Fuel Materials
Atomistic-scale Simulations used to Simulate Creep in Oxide Fuel
Atomistic and Mesoscale Modeling of Fission Gas and Fission Products Diffusivity in TRISO Fuel Kernels
Atomistic Investigation of Radiation-induced Defects in ThO2
Cluster Dynamics Modeling of Defects and Fission Gas in Gd Doped UO2 under Irradiation
Comprehensive Characterization of Damage in Ion Irradiated Ceramics for Validation of Atomistic Models
Defect Chemistry and Radiation Stability of (Gd & Zr) Co-doped UO2
Development of UC/UO2 Composite Fuels for Light Water Reactors
Diffusion Properties in Uranium-plutonium Mixed Oxides: Atomic Scale Investigation of the Effect of Composition and Chemical Disorder
Emulation of Microstructures and Tritium Behavior in Lithium Aluminate by Ion Irradiation
Exploring Irradiation-induced Phase Evolution in WC
Hidden Defect Evolution Mechanism in ThO2 Revealed by Atomistic Modeling
High-entropy Carbide Ceramics: New Materials for Extreme Environments in Nuclear Energy Applications
Impact of Resonance Scattering on the Thermal Conductivity of ThO2
Improving Uranium Mononitride Behaviour using Uranium Diboride Addition
Irradiation- and Dopant-induced Structural Changes in Ceramic Nuclear Fuels Probed via Elastic and Optical Properties
Low-temperature Fabrication of Ceramic Tritium Breeder Materials, for Enhanced Control of Microstructure and Phase Formation
Microstructural Characterization of Neutron Irradiated Concrete Minerals
Microstructural, Mechanical and Thermal Characterization of High Entropy Carbide Ceramics
Modelling the Melting Temperature of CrUO4 to Assess its Behaviour during the Sintering of Cr-doped UO2
Multiphysics Modeling of High Burnup UO2 at Mesoscale
Multiscale Modeling for High-burnup Structure Formation in UO2
O-1: Uranium Silicide Processing for Advanced Reactors
O-31: Radiation Damage in Lithium Oxide, a Surrogate for Beryllium Carbide
Oxidation Behavior and Mechanisms of the SiC Coating in TRISO Fuel Particles
Phase Equilibria and Thermodynamics of Tri-carbide Fuels for Nuclear Thermal Propulsion
Predicting Mechanical Behavior of Uranium Oxide Fuel Pellets Using Full-field Defect Diffusion Modeling in a Crystal Plasticity Framework
Quantifying the Impact of Fast Interface Diffusion and Free Surface Evolution on Fission Gas Release in UO2 Using a Phase-field Model
Radiation Shielding Ceramics with Enhanced Performance and Scalability
Radiation Studies on the TiZrNbHfTa High Entropy Alloy and Its Hydrides
Relating Microstructural Evolution and Stoichiometry to Tritium Release from Ternary Lithium Ceramics
Revealing The Microstructure and Irradiation Effects on UO2 Fracture via Coupled Phase-field and MD Simulations Approach
Scanning Transmission Electron Microscopy of Nanoprecipitates in Spent UO2 Nuclear Fuel
Silica Formation on SiC Following Steam Attack
Simulation of Irradiation-induced Bubble Over-pressurization and Application in Fuel Performance
Soft X-ray Synchrotron Radiation Spectromicroscopy of Spent Nuclear Fuel Focused Ion Beam Sections
Surface Modification Strategies for Hydrogen Retention in Hydride Moderators
Susceptibility of Nuclear Fuel Ceramics to Oxidation and Hydridization during Off Normal Events
Thermomechanical Characterization of Advanced Reactor Alloys and Composites Exposed to High-temperature Gas Environments
Zirconia-coated Uranic Fuel Particles Processing and In Situ Sintering Characterisation

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