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

Oak Ridge National Laboratory

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

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

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.

Funders	Funder number
DOE-NE
Office of Nuclear Energy

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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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 - 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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