Fabrication of UO                         2                         -Mo composite fuel with enhanced thermal conductivity from sol-gel feedstock

S. C. Finkeldei; J. O. Kiggans; R. D. Hunt; A. T. Nelson; K. A. Terrani

doi:10.1016/j.jnucmat.2019.04.011

Fabrication of UO ₂ -Mo composite fuel with enhanced thermal conductivity from sol-gel feedstock

S. C. Finkeldei, J. O. Kiggans, R. D. Hunt, A. T. Nelson, K. A. Terrani

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

Fabrication of monolithic UO ₂ and UO ₂ -Mo composites from Mo metal powder feedstock and UO ₃ spheres derived from internal gelation was explored. The addition of 10 vol% Mo as a secondary phase to UO ₂ led to an increase of up to 30% in thermal conductivity compared to syntheses in which only pure UO ₂ was used. Using coarse and fine Mo metal powder feedstock led to different microstructures, influencing the thermal conductivity of the resulting composites.

Original language	English
Pages (from-to)	56-64
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	520
DOIs	https://doi.org/10.1016/j.jnucmat.2019.04.011
State	Published - Jul 2019

Funding

This work was supported by the US Department of Energy Office of Nuclear Energy (DOE-NE) Advanced Fuels Campaign (AFC) . The authors would like to thank Stephanie Curlin for LFA measurements, N. Cinbiz and T. Watkins for in-depth discussions, C. Silva for x-ray diffraction measurements, J. McMurray for simultaneous thermal analysis (STA) measurements, and J. Dyer for polishing selected pellets.

Keywords

Enhanced thermal conductivity
Internal gelation
Molybdenum
Uranium dioxide

Access to Document

10.1016/j.jnucmat.2019.04.011

Cite this

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title = " Fabrication of UO 2 -Mo composite fuel with enhanced thermal conductivity from sol-gel feedstock ",

abstract = " Fabrication of monolithic UO 2 and UO 2 -Mo composites from Mo metal powder feedstock and UO 3 spheres derived from internal gelation was explored. The addition of 10 vol% Mo as a secondary phase to UO 2 led to an increase of up to 30% in thermal conductivity compared to syntheses in which only pure UO 2 was used. Using coarse and fine Mo metal powder feedstock led to different microstructures, influencing the thermal conductivity of the resulting composites.",

keywords = "Enhanced thermal conductivity, Internal gelation, Molybdenum, Uranium dioxide",

author = "Finkeldei, {S. C.} and Kiggans, {J. O.} and Hunt, {R. D.} and Nelson, {A. T.} and Terrani, {K. A.}",

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doi = "10.1016/j.jnucmat.2019.04.011",

language = "English",

volume = "520",

pages = "56--64",

journal = "Journal of Nuclear Materials",

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Fabrication of UO ₂ -Mo composite fuel with enhanced thermal conductivity from sol-gel feedstock . / Finkeldei, S. C.; Kiggans, J. O.; Hunt, R. D. et al.
In: Journal of Nuclear Materials, Vol. 520, 07.2019, p. 56-64.

Research output: Contribution to journal › Article › peer-review

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AU - Finkeldei, S. C.

AU - Kiggans, J. O.

AU - Hunt, R. D.

AU - Nelson, A. T.

AU - Terrani, K. A.

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KW - Internal gelation

KW - Molybdenum

KW - Uranium dioxide

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