|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accident Tolerant Fuels for Light Water Reactor
||Investigation of Additives, Sol-gel Process Variables, and HIP Parameters on the Density UN Microspheres
||Jacob McMurray, Rodney Hunt, Jim Kiggans, Tyler Reif, Grant Helmreich, Chinthaka Silva, Rachel Seibert, Kurt Terrani
|On-Site Speaker (Planned)
Uranium mononitride with a theoretical density (TD) of 14.3 g/cc is the material of choice to be used as the kernel in fully ceramic microencapsulated fuel. The effect of additives and feed-stock processing variables on producing near full TD microspheres was studied. Gadolinium is of interest as a burnable poison. Fortunately, Gd can be incorporated into the feed stock sol-gel broth as a nitrate hexahydrate while also serving to increase %TD. The type of carbon, dispersant, additive, and combination thereof appear to have the strongest influence on final density; other processing variables, such as the gelation temperature of the feedstock, also impacted it but the relationship was found to be weaker. Hot isostatic pressing parameters of closed porosity UN microspheres was also investigated resulting in ~87% TD UN taken to 97% TD.
Research supported by the US Department of Energy, Office of Nuclear Energy, Advanced Fuels Campaign.
||Planned: Supplemental Proceedings volume