Thermophysical properties of U3Si5 to 1773 K

J. T. White; A. T. Nelson; D. D. Byler; D. J. Safarik; J. T. Dunwoody; K. J. McClellan

doi:10.1016/j.jnucmat.2014.10.021

Thermophysical properties of U₃Si₅ to 1773 K

J. T. White, A. T. Nelson, D. D. Byler, D. J. Safarik, J. T. Dunwoody, K. J. McClellan

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62 Scopus citations

Abstract

Possible use of U₃Si₅ as a nuclear reactor fuel requires knowledge of its thermophysical properties as a function of temperature. While limited data is available for U-Si compounds containing higher uranium densities, no investigations of U₃Si₅ have been presented in the literature to date. High purity U₃Si₅ was fabricated to facilitate a set of experiments to determine the coefficient of thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity from room temperature to 1773 K. Each measurement on nearly stoichiometric U₃Si₅ showed the existence of a phase transformation at 723 K, which is not consistent with the most recently published phase diagram.

Original language	English
Pages (from-to)	442-448
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	456
DOIs	https://doi.org/10.1016/j.jnucmat.2014.10.021
State	Published - Jan 2015
Externally published	Yes

Funding

The support of the U.S. Department of Energy, Office of Nuclear Energy Fuel Cycle Research and Development Program is gratefully acknowledged. This work was performed at Los Alamos National Laboratory under the auspices of the U.S. Department of Energy .

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10.1016/j.jnucmat.2014.10.021

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abstract = "Possible use of U3Si5 as a nuclear reactor fuel requires knowledge of its thermophysical properties as a function of temperature. While limited data is available for U-Si compounds containing higher uranium densities, no investigations of U3Si5 have been presented in the literature to date. High purity U3Si5 was fabricated to facilitate a set of experiments to determine the coefficient of thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity from room temperature to 1773 K. Each measurement on nearly stoichiometric U3Si5 showed the existence of a phase transformation at 723 K, which is not consistent with the most recently published phase diagram.",

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AU - Nelson, A. T.

AU - Byler, D. D.

AU - Safarik, D. J.

AU - Dunwoody, J. T.

AU - McClellan, K. J.

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AB - Possible use of U3Si5 as a nuclear reactor fuel requires knowledge of its thermophysical properties as a function of temperature. While limited data is available for U-Si compounds containing higher uranium densities, no investigations of U3Si5 have been presented in the literature to date. High purity U3Si5 was fabricated to facilitate a set of experiments to determine the coefficient of thermal expansion, heat capacity, thermal diffusivity, and thermal conductivity from room temperature to 1773 K. Each measurement on nearly stoichiometric U3Si5 showed the existence of a phase transformation at 723 K, which is not consistent with the most recently published phase diagram.

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Thermophysical properties of U₃Si₅ to 1773 K

Abstract

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