Publications
Showing 17 results for Author: Dan R. Brown
Aug, 2026
Journal
Quantitative measurement of pebble fuel anisotropy using generalized ellipsometry
The renewed development of high-temperature gas-cooled reactors has created a need to modernize pebble fuel quality control methods. One important specification in these methods is the coefficient of thermal expansion (CTE) anisotropy, which reflects graphite grain alignment and affects fuel performance. This study investigates the feasibility of using two-modulator genera…
Nov, 2023
Journal
Fabrication of UN-Mo CERMET Nuclear Fuel Using Advanced Manufacturing Techniques
Ceramic-metallic nuclear fuels are a candidate fuel for nuclear thermal propulsion systems due to their high heat transport properties, which are necessary in very high-temperature environments. The conventional fabrication of uranium nitride–molybdenum fuel has been thoroughly studied in the past, but modern manufacturing techniques have presented a unique opportunity for…
Nov, 2023
Journal
Evaluation of pebble scanning strategies for fuel qualification by simple simulated radiography
Reactor designs using tristructural-isotropic (TRISO) particles in pebble fuel forms have been developed in multiple programs and are now being designed and deployed by several companies around the world. Fuel pebbles for these designs commonly contain an inner fueled zone packed with TRISO particles and a fuel-free zone on the surface of the pebble to protect the particle…
Nov, 2023
Conference Paper
Fabrication of UN-Mo CERMET nuclear fuel using advanced manufacturing techniques
Nov, 2023
Journal
Quantification of silicon carbide grain structure in TRISO fuel by BSE image analysis
The grain structure of the silicon carbide (SiC) layer in tristructural-isotropic (TRISO) fuels has commonly been qualified in fuel specifications based on a qualitative comparison to visual standards to ensure undesirable microstructure are not produced. This approach is inherently dependent on subjective judgement and provides limited data for analysis or comparison. An…