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Title: Effect of melter feed foaming on heat flux to the cold cap

Abstract

The glass production rate, which is crucial for the nuclear waste cleanup lifecycle, is influenced by the chemical and mineralogical nature of melter feed constituents. The choice of feed materials affects both the conversion heat and the thickness of the foam layer that forms at the bottom of the cold cap and controls the heat flow from molten glass. We demonstrate this by varying the alumina source, namely, substituting boehmite or corundum for gibbsite, in a high-alumina high-level-waste melter feed. The extent of foaming was determined using the volume expansion test and the conversion heat with differential scanning calorimetry. Evolved gas analysis was used to identify gases responsible for the formation of primary and secondary foam. The foam thickness, a critical factor in the rate of melting, was estimated using known values of heat conductivities and melting rates. The result was in reasonable agreement with the foam thickness experimentally observed in the laboratory-scale melter.

Authors:
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Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1416685
Report Number(s):
PNNL-SA-124642
Journal ID: ISSN 0022-3115; 830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 496; Journal Issue: C
Country of Publication:
United States
Language:
English

Citation Formats

Lee, SeungMin, Hrma, Pavel, Pokorny, Richard, Klouzek, Jaroslav, VanderVeer, Bradley J., Dixon, Derek R., Luksic, Steven A., Rodriguez, Carmen P., Chun, Jaehun, Schweiger, Michael J., and Kruger, Albert A.. Effect of melter feed foaming on heat flux to the cold cap. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.09.016.
Lee, SeungMin, Hrma, Pavel, Pokorny, Richard, Klouzek, Jaroslav, VanderVeer, Bradley J., Dixon, Derek R., Luksic, Steven A., Rodriguez, Carmen P., Chun, Jaehun, Schweiger, Michael J., & Kruger, Albert A.. Effect of melter feed foaming on heat flux to the cold cap. United States. doi:10.1016/j.jnucmat.2017.09.016.
Lee, SeungMin, Hrma, Pavel, Pokorny, Richard, Klouzek, Jaroslav, VanderVeer, Bradley J., Dixon, Derek R., Luksic, Steven A., Rodriguez, Carmen P., Chun, Jaehun, Schweiger, Michael J., and Kruger, Albert A.. Fri . "Effect of melter feed foaming on heat flux to the cold cap". United States. doi:10.1016/j.jnucmat.2017.09.016.
@article{osti_1416685,
title = {Effect of melter feed foaming on heat flux to the cold cap},
author = {Lee, SeungMin and Hrma, Pavel and Pokorny, Richard and Klouzek, Jaroslav and VanderVeer, Bradley J. and Dixon, Derek R. and Luksic, Steven A. and Rodriguez, Carmen P. and Chun, Jaehun and Schweiger, Michael J. and Kruger, Albert A.},
abstractNote = {The glass production rate, which is crucial for the nuclear waste cleanup lifecycle, is influenced by the chemical and mineralogical nature of melter feed constituents. The choice of feed materials affects both the conversion heat and the thickness of the foam layer that forms at the bottom of the cold cap and controls the heat flow from molten glass. We demonstrate this by varying the alumina source, namely, substituting boehmite or corundum for gibbsite, in a high-alumina high-level-waste melter feed. The extent of foaming was determined using the volume expansion test and the conversion heat with differential scanning calorimetry. Evolved gas analysis was used to identify gases responsible for the formation of primary and secondary foam. The foam thickness, a critical factor in the rate of melting, was estimated using known values of heat conductivities and melting rates. The result was in reasonable agreement with the foam thickness experimentally observed in the laboratory-scale melter.},
doi = {10.1016/j.jnucmat.2017.09.016},
journal = {Journal of Nuclear Materials},
number = C,
volume = 496,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2017},
month = {Fri Dec 01 00:00:00 EST 2017}
}