Effect of sucrose on foaming and melting behavior of a low‐activity waste melter feed

Appel, Connor J.; Kloužek, Jaroslav; Jani, Nikhil; Lee, Seung Min; Dixon, Derek R.; Hrma, Pavel; Pokorný, Richard; Schweiger, Michael J.; Kruger, Albert A.

doi:10.1111/jace.16675

Effect of sucrose on foaming and melting behavior of a low‐activity waste melter feed

Journal Article · Wed Jul 10 00:00:00 EDT 2019 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.16675· OSTI ID:1532779

Appel, Connor J. ^[1]; ^[2]; Jani, Nikhil ^[1]; ^[1]; Dixon, Derek R. ^[1]; Hrma, Pavel ^[1]; ^[2]; Schweiger, Michael J. ^[1]; Kruger, Albert A. ^[3]

Pacific Northwest National Laboratory Richland WA USA
Laboratory of Inorganic Materials Joint Workplace of the University of Chemistry and Technology Prague Prague Czech Republic, Institute of Rock Structure and Mechanics of the ASCR Prague Czech Republic
U.S. Department of Energy, Office of River Protection Richland WA USA

Abstract

Reductants, such as sucrose (C ₁₂ H ₂₂ O ₁₁ ), are added to nuclear waste melter feeds containing high fractions of nitrates and nitrites to reduce excessive foaming during feed‐to‐glass conversion, decrease sulfate segregation, and increase technetium retention. The effect of sucrose on foaming and melting reactions during the conversion was examined using the feed volume expansion test, thermogravimetric analysis, evolved gas analysis, x‐ray diffraction, and scanning electron microscopy with energy dispersive x‐ray spectrometry. Different amounts of sucrose were added to vary the carbon to nitrogen (C/N) ratio in the melter feed. As the C/N ratio increased, the extent of foaming decreased, and the N ₂ /NO ratio increased in the evolved gas. Significant foam suppression, rapid gas release at approximately 250°C, and reduction in transition metal oxides were observed at C/N > 1.1.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

OSTI ID:: 1532779

Alternate ID(s):: OSTI ID: 1571494

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 12 Vol. 102; ISSN 0002-7820

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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