|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||TRISO Coating Development for Uranium Nitride Kernels
||Brian Jolly, Terrence Lindemer, Kurt Terrani
|On-Site Speaker (Planned)
In support of fully ceramic microencapsulated (FCM) fuel development, coating development work is ongoing at the Oak Ridge National Laboratory (ORNL) to produce tri-isotropic (TRISO) coated fuel particles with UN kernels. The nitride kernels are used to increase heavy metal density in these SiC-matrix fuel pellets which have the potential to be an accident tolerant fuel form. A carbothermic reduction process was used to produce the 800µm UN kernels and yielded theoretical densities consistently above 85%. The advanced gas reactor (AGR) program at ORNL used fluidized bed chemical vapor deposition (FBCVD) techniques for TRISO coating of UCO (two phase mixture of UO2 and UCx) kernels. Similar techniques were employed for coating of the UN kernels, however significant changes in processing conditions were required to maintain acceptable coating properties due to physical property and dimensional differences between the previous 350µm UCO and the current 800 µm UN kernels.
||Planned: A print-only volume