Microstructural characterization of annealed U-12Zr-4Pd and U-12Zr-4Pd-5Ln: Investigating Pd as a metallic fuel additive

Benson, Michael T.; He, Lingfeng; King, James A.; Mariani, Robert D.

doi:10.1016/j.jnucmat.2018.02.012

Title: Microstructural characterization of annealed U-12Zr-4Pd and U-12Zr-4Pd-5Ln: Investigating Pd as a metallic fuel additive

Journal Article · 07 February 2018 · Journal of Nuclear Materials

DOI: https://doi.org/10.1016/j.jnucmat.2018.02.012 · OSTI ID:1477493

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^[1]; Mariani, Robert D. ^[1]

Idaho National Lab. (INL), Idaho Falls, ID (United States)

Here, palladium is being investigated as a potential additive to metallic fuel to control fuel-cladding chemical interaction (FCCI). A primary cause of FCCI is the lanthanide fission products moving to the fuel periphery and interacting with the cladding. This interaction will lead to wastage of the cladding and eventually to a cladding breach. The current study is a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterization of annealed U-12Zr-4Pd and U-12Zr-4Pd-5Ln, where Ln=53Nd-25Ce-16Pr-6La. The present study shows that Pd preferentially binds the lanthanides, which will prevent lanthanide migration and interaction with the cladding. The SEM analysis indicates the 1:1 Pd-Ln compound is being formed, while the TEM analysis, due to higher resolution, found the 1:1 compound, as well as Pd-rich compounds Pd₂Ln and Pd₃Ln₂.

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Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1477493

Report Number(s):: INL/JOU-17-43587-Rev000

Journal Information:: Journal of Nuclear Materials, Journal Name: Journal of Nuclear Materials Journal Issue: C Vol. 502; ISSN 0022-3115

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Evaluation of Tellurium as a Fuel Additive in Neodymium-Containing U-Zr Metallic Fuel Jerred, Nathan D.; Khanal, Rabi; Benson, Michael T. Scientific Reports, Vol. 9, Issue 1 https://doi.org/10.1038/s41598-019-51852-z	journal	November 2019

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Title: Microstructural characterization of annealed U-12Zr-4Pd and U-12Zr-4Pd-5Ln: Investigating Pd as a metallic fuel additive

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