Publications
Showing 121 results for Author: Grant W. Helmreich
Sep, 2026
ORNL Report
Oak Ridge National Laboratory and Kairos Power 2026 Annual Report: Project Year 1
Sep, 2026
Journal
Expanded method for the determination of burnup in nuclear fuels using multiple neodymium isotopes
Established methods for the determination of burnup in nuclear fuels commonly rely on the measurement of 148Nd in the spent fuel in concert with known fission product yields to determine the atom percent of fissions in the fuel. This isotope of neodymium is used for various reasons, including chemical and radioactive stability, ease of measurement, and low rates of formati…
Sep, 2026
Conference Paper
Initial Results from Post Irradiation Examination of AGR-5/6/7 TRISO Fuel
Aug, 2026
Journal
Irradiation of UC1+x kernels using the MiniFuel vehicle: Microstructure, phase analysis, and initial post-irradiation examination
Uranium carbide is a candidate fuel form for a wide range of advanced reactors, including larger Generation IV reactors as well as small modular reactors and microreactors. However, its commercial deployment timeline faces challenges via traditional qualification approaches. To address this issue, an accelerated fission rate irradiation test was performed to collect basic…
Apr, 2026
Journal
ROADRUNNER uranium nitride MiniFuel: Experimental design, fabrication and pre-irradiation baseline characterization for accelerated burnup testing
Uranium Nitride (UN) is considered as a possible driver fuel for a variety of advanced reactor designs; however, its qualification remains limited by the lack of consistent, high-quality irradiation performance data. To address this gap, the ROADRUNNER (Research On ADvancing the peRformance of UraNium Nitrides in Extreme enviRonments) irradiation campaign leveraging the Mi…