M3FT-15OR0202237: Submit Report on Results From Initial Coating Layer Development For UN TRISO Particles

Technical Report · Sun Feb 01 00:00:00 EST 2015

DOI:https://doi.org/10.2172/1185943· OSTI ID:1185943

Jolly, Brian C. ^[1]; Lindemer, Terrence ^[2]; Terrani, Kurt A. ^[1]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
2. Harbach Engineering and Solutions, Dayton, OH (United States)

In support of fully ceramic matrix (FCM) fuel development, coating development work has begun 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 with details described elsewhere. 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 UC_x) 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 UCO and UN kernels.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1185943
• Report Number(s): ORNL/LTR-2015/87; AF5810000; NEAF278
• Country of Publication: United States
• Language: English