Increase in pyrolytic carbon optical anisotropy and density during processing of coated particle fuel due to heat treatment

J. D. Hunn, G. E. Jellison, R. A. Lowden

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Measurements of pyrolytic carbon optical anisotropy and density have been made on a series of tri-isotropic (TRISO) coated particles prepared for the United States Department of Energy's Advanced Gas Reactor Fuel Development and Qualification (AGR) program. These measurements show the effect of varying the deposition conditions, especially the deposition temperature, on the density and optical anisotropy of the carbon layers. Additional heat treatment studies of the coated particles at various stages illustrate the strong effect of post-deposition thermal processing on these two pyrolytic carbon properties. Such post-deposition heat treatment occurs during SiC deposition and fuel compact firing, resulting in increased anisotropy and density of the pyrolytic carbon layers.

Original languageEnglish
Pages (from-to)445-452
Number of pages8
JournalJournal of Nuclear Materials
Volume374
Issue number3
DOIs
StatePublished - Mar 15 2008

Funding

Research was sponsored by the US-DOE Office of Nuclear Energy, Science and Technology’s Advanced Gas Reactor Fuel Development and Qualification program and by the Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the US Department of Energy under Contract No. DE-ACO5-00OR22725.

FundersFunder number
US-DOE Office of Nuclear Energy, Science and Technology’s Advanced Gas Reactor Fuel Development and Qualification program
U.S. Department of EnergyDE-ACO5-00OR22725
Oak Ridge National Laboratory
UT-Battelle

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