skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Improved Alumina Loading in High-Level Waste Glasses

Abstract

Recent tank retrieval and blending strategies at both the Savannah River Site (SRS) and Hanford have identified increased amounts of high-Al2O3 waste streams that are scheduled to be processed through their respective high-level waste (HLW) vitrification facilities. It is well known that the addition of small amounts of Al2O3 to borosilicate glasses generally enhances the durability of the waste glasses. However, at higher Al2O3 concentrations nepheline (NaAlSiO4) formation can result in a severe deterioration of the chemical durability of the slowly cooled glass near the center of the canister. Additionally, higher concentrations of Al2O3 generally increase the liquidus temperature of the melt and decrease the processing rate and thus result in a decreased waste loading in glass. Because of these effects, the maximum concentrations of Al2O3 in glasses have been restricted to the range of 17 wt% or lower. Pacific Northwest National Laboratory (PNNL), Savannah River National Laboratory (SRNL), and Khlopin Radium Institute (KRI) are jointly performing laboratory and scaled melter tests, through US Department of Energy, EM-21 Office of Waste Processing program, to develop glass formulations with increased Al2O3 concentrations. These glasses are formulated for specific DOE waste compositions at Hanford and SRS. The objectives are to avoid nephelinemore » formation while maintaining or meeting waste loading and/or waste throughput expectations as well as satisfying critical process and product performance related constraints. This paper reports the results of recent tests of simulated Hanford HLW glasses containing up to 26 wt% Al2O3 in glass.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
979525
Report Number(s):
PNNL-SA-58490
EY804910M; TRN: US1003197
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: WM2008 Conference: Phoenix Rising: Moving Forward in Waste Management, Paper No. 8460
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; BOROSILICATE GLASS; GLASS; PERFORMANCE; PROCESSING; RADIUM; TANKS; VITRIFICATION; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; HLW; glass; nepheline; spinel; high-Al2O3

Citation Formats

Kim, Dong-Sang, Vienna, John D., Peeler, David K., Fox, Kevin M., Aloy, A. S., Trofimenko, A. V., and Gerdes, Kurt D. Improved Alumina Loading in High-Level Waste Glasses. United States: N. p., 2008. Web.
Kim, Dong-Sang, Vienna, John D., Peeler, David K., Fox, Kevin M., Aloy, A. S., Trofimenko, A. V., & Gerdes, Kurt D. Improved Alumina Loading in High-Level Waste Glasses. United States.
Kim, Dong-Sang, Vienna, John D., Peeler, David K., Fox, Kevin M., Aloy, A. S., Trofimenko, A. V., and Gerdes, Kurt D. Thu . "Improved Alumina Loading in High-Level Waste Glasses". United States.
@article{osti_979525,
title = {Improved Alumina Loading in High-Level Waste Glasses},
author = {Kim, Dong-Sang and Vienna, John D. and Peeler, David K. and Fox, Kevin M. and Aloy, A. S. and Trofimenko, A. V. and Gerdes, Kurt D.},
abstractNote = {Recent tank retrieval and blending strategies at both the Savannah River Site (SRS) and Hanford have identified increased amounts of high-Al2O3 waste streams that are scheduled to be processed through their respective high-level waste (HLW) vitrification facilities. It is well known that the addition of small amounts of Al2O3 to borosilicate glasses generally enhances the durability of the waste glasses. However, at higher Al2O3 concentrations nepheline (NaAlSiO4) formation can result in a severe deterioration of the chemical durability of the slowly cooled glass near the center of the canister. Additionally, higher concentrations of Al2O3 generally increase the liquidus temperature of the melt and decrease the processing rate and thus result in a decreased waste loading in glass. Because of these effects, the maximum concentrations of Al2O3 in glasses have been restricted to the range of 17 wt% or lower. Pacific Northwest National Laboratory (PNNL), Savannah River National Laboratory (SRNL), and Khlopin Radium Institute (KRI) are jointly performing laboratory and scaled melter tests, through US Department of Energy, EM-21 Office of Waste Processing program, to develop glass formulations with increased Al2O3 concentrations. These glasses are formulated for specific DOE waste compositions at Hanford and SRS. The objectives are to avoid nepheline formation while maintaining or meeting waste loading and/or waste throughput expectations as well as satisfying critical process and product performance related constraints. This paper reports the results of recent tests of simulated Hanford HLW glasses containing up to 26 wt% Al2O3 in glass.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {2}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: