|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Ceramic Materials for Nuclear Energy Research and Applications
|Defect Chemistry and Radiation Stability of (Gd & Zr) Co-doped UO2
|Ritesh Mohun, Daniel Bailey, Martin Stennett, Claire Corkhill, Simon Middleburgh
|On-Site Speaker (Planned)
The irradiation behaviour of pure UO2 has been studied experimentally, but little is known about the irradiation of UO2 doped with fission products such as rare-earth elements (REEs). This study is devoted to investigating the effect of heavy-ion irradiation of UO2 when doped with both trivalent Gd and tetravalent Zr at varied concentrations.
The surface characterisation of the prepared pellets revealed a significant modification of the initial UO2 microstructure due to dopant incorporation. The intrinsic defect structures induced by the multivalence dopants, as well as their behaviour as a result of ionic implantation, were investigated using experimental XRD, XANES, and Raman spectroscopy coupled with theoretical DFT+U calculations. This talk aims to discuss the key mechanisms that occur near defect-boundary interfaces in order to highlight the precise role of dopant and grain boundary areas in changing the lattice defects mechanisms and subsequent evolution in fluorite structure relevant to nuclear fuels.
|Ceramics, Nuclear Materials, Characterization