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Paper Titles
Preface
Uranium Diffusion in Metals Used in Nuclear Facilities - A New Approach
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Relating Diffusion Couple Experiment Results to Observed As-Fabricated Microstructures in Low-Enriched U-10wt.% Mo Monolithic Fuel Plates
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MFPR Model Parameters of the Athermal Irradiation-Induced Transport in Nuclear Fuels
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Oxygen Chemical Diffusion Coefficients of (U, Pu)O2-x
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Irradiation Creep of Uranium-Plutonium Nitride Fuel and Serviceability of Fuel Element
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Relating Diffusion Couple Experiment Results to Observed As-Fabricated Microstructures in Low-Enriched U-10wt.% Mo Monolithic Fuel Plates

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Abstract:

Monolithic fuel system with U – 10 wt.% Mo (U10Mo) fuel alloy has been developed for the Materials Management and Minimization reactor conversion program to replace highly-enriched fuels in research and test reactors with low-enriched fuels. Interdiffusion and phase transformations in the system constituents, i.e., U10Mo fuel, AA6061 cladding, and Zr diffusion barrier, have been investigated using fuel plates fabricated via rolling and hot-isostatic pressing. Diffusion couples, utilizing the constituents of the fuel system were also carried out to help understand the findings from fuel plates based on phase equilibria and diffusion kinetics. Findings from both fuel plates and diffusion couples can provide a comprehensive knowledge to assess, model, and predict the performance of monolithic low-enriched fuel system from fabrication to irradiation. This paper summarizes the experimental results reported from characterization of the fuel plates and diffusion couples with emphasis on interactions at the fuel-cladding, fuel-diffusion barrier, cladding-diffusion barrier, and cladding-cladding interfaces. Constituent phases and relevant diffusion kinetics are compared and contrasted, taking into account differences in thermodynamics and kinetics variables such as pressure, temperature, and cooling rate.

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Periodical:

Defect and Diffusion Forum (Volume 375)

Pages:

18-28

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.375.18

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Online since:

May 2017

Authors:

Ryan Newell, Abhishek Mehta, Young Joo Park, Yong Ho Sohn, Jan Fong Jue, Dennis D. Keiser Jr.*

Keywords:

Aluminum, Cladding, Diffusion, Diffusion Barrier, Metallic Nuclear Fuels, Molybdenum, Phase Transformations, Uranium, Zirconium

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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