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Effects of alumina sources (gibbsite, boehmite, and corundum) on melting behavior of high-level radioactive waste melter feed

Published online by Cambridge University Press:  23 December 2016

SeungMin Lee ,
Pavel Hrma ,
Richard Pokorny ,
Jaroslav Klouzek ,
Bradley J. VanderVeer ,
Carmen P. Rodriguez ,
Jaehun Chun ,
Michael J. Schweiger  and
Albert A. Kruger
SeungMin Lee*
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Pavel Hrma
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Richard Pokorny
Affiliation:
Laboratory of Inorganic Materials, joint workplace of the University of Chemistry and Technology and the Institute of Rock Structure and Mechanics of the ASCR, V Holešovičkách 41, 182 09 Prague 8, Czech Republic
Jaroslav Klouzek
Affiliation:
Laboratory of Inorganic Materials, joint workplace of the University of Chemistry and Technology and the Institute of Rock Structure and Mechanics of the ASCR, V Holešovičkách 41, 182 09 Prague 8, Czech Republic
Bradley J. VanderVeer
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Carmen P. Rodriguez
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Jaehun Chun
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Michael J. Schweiger
Affiliation:
Radiological Material & Detection Group, Pacific Northwest National Laboratory, Richland, WA 99352, U.S.A.
Albert A. Kruger
Affiliation:
U.S. Department of Energy, Office of River Protection, Richland, WA 99352, U.S.A.
*
*(Email: seungmin.lee@pnnl.gov)
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Abstract

Types of melter feed materials affect glass production rates. This study focuses on the effects of alumina sources on melting behavior of high-alumina high-level-waste melter feeds containing different alumina sources, namely, gibbsite, boehmite, and corundum. The heat flow from the glass melt to the cold cap, a floating layer of the reacting feed, is partially hindered by a foam layer at the bottom of the cold cap. Volume expansion tests and thermoanalytical methods revealed that a slow-melting feed with corundum foamed extensively, whereas a fast-melting feed with boehmite had a low reaction heat and produced less stable foam. The foam thickness, a critical factor for the rate of melting, estimated using the relationship between the heat conductivity and foam porosity was in reasonable agreement with experimental observation.

Keywords

foamspecific heatporosity
Type
Articles
Information
MRS Advances , Volume 2 , Issue 11: Scientific Basis for Nuclear Waste Management XL , 2017 , pp. 603 - 608
Copyright
Copyright © Materials Research Society 2016 

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References

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