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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Leading the charge: INL’s role in advancing HALEU production
Idaho National Laboratory is playing a key role in helping the U.S. Department of Energy meet near-term needs by recovering HALEU from federal inventories, providing critical support to help lay the foundation for a future commercial HALEU supply chain. INL also supports coordination of broader DOE efforts, from material recovery at the Savannah River Site in South Carolina to commercial enrichment initiatives.
C. D. Baumann, P. E. Reagan
Nuclear Technology | Volume 7 | Number 6 | December 1969 | Pages 537-549
Fuel | doi.org/10.13182/NT69-A28373
Articles are hosted by Taylor and Francis Online.
Mathematical models describing idealized mechanisms of fission-gas release were used as criteria to determine the mode of release from fully enriched UCrfueled pyrocarbon-coated particles that had slightly 235U-contaminated outer coatings. Below 1600°C the release of krypton, and probably iodine and xenon, was due to fissions which occurred in the contaminated outer coating, with the products escaping by solid-state diffusion from the coating. Above 1600°C the krypton release increased more rapidly with temperature. The krypton originated in the fuel core and traversed the outer coating either by solid-state diffusion or Knudsen flow through micropores in the outer coating. The overall increase in release rate with time was probably due to migration of the 235U initially in the outer coating, and to the over five-fold increase in 235U contamination of the outer coating during irradiation.
