|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||Investigating the Thermophysical Properties and Key Contributions to the Thermal Conductivity of Different Nitride Systems
||Conor Galvin, Nicholas Barron, Navaratnarajah Kuganathan, Michael Cooper, Robin Grimes
|On-Site Speaker (Planned)
Nitrides are an attractive alternative fuel form to oxides, particularly for fast reactors. New and existing empirical potential models were employed to predict temperature dependent properties of UN, PuN and (U,Pu)N. The thermophysical properties were investigated and compared to available experimental values. If we are to understand how fuel performs under reactor operating conditions, it is not only crucial to understand the thermophysical properties but also what effect defects have on these properties – especially as defects accumulate as fuel burn-up proceeds. Therefore, this work was extended to examine hyper-stoichiometric UN by adding U vacancies and N interstitials. Aside from these temperature dependent properties; thermal conductivity is one of the main properties that governs nuclear fuel performance. Therefore, we also predict the thermal conductivity of nitrides. The thermal conductivity is broken down into its constituent parts and their influence compared to the thermal conductivity of oxides.
||Modeling and Simulation, Nuclear Materials, Other