Evaluations of glass vitrification techniques on iron ratio determinations

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High-level liquid waste at the Savannah River Site (SRS) will be processed into borosilicate glass at the Defense Waste Processing Facility (DWPF). Waste glass will be transported to a geologic repository for permanent disposal. Control of the redox properties of the melter feed is necessary for smooth operation of the melter. The Fe(II)/total Fe ratio in glass is a measure of the redox conditions in the melter. To simulate final glass product conditions, melter feed samples will be vitrified at the DWPF laboratory. A colorimetric method was used to determine the Fe(II)/total Fe ratio on vitrified melter feed samples. Because ... continued below

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8 p.

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Spencer, R. B. December 31, 1991.

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Description

High-level liquid waste at the Savannah River Site (SRS) will be processed into borosilicate glass at the Defense Waste Processing Facility (DWPF). Waste glass will be transported to a geologic repository for permanent disposal. Control of the redox properties of the melter feed is necessary for smooth operation of the melter. The Fe(II)/total Fe ratio in glass is a measure of the redox conditions in the melter. To simulate final glass product conditions, melter feed samples will be vitrified at the DWPF laboratory. A colorimetric method was used to determine the Fe(II)/total Fe ratio on vitrified melter feed samples. Because the crucible vitrification technique can have a large effect on the Fe(II)/total Fe ratio, crucible sealing during vitrification of the waste feed sample, and the type of heating applied vitrification, were the variables investigated for Fe(II)/total Fe ratio measurement effects. Various lid sealants were used for determining crucible sealing effects. Microwave and conventional heating were tested for glass vitrifications. Microwave heating and a nepheline gel sealant, to exclude oxygen from the alumina crucibles during vitrification, was adopted for use at the DWPF laboratory. This paper discusses microwave vitrification and crucible sealing techniques.

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8 p.

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OSTI; NTIS; GPO Dep.

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  • 3. international high level radioactive waste management (IHLRWM) conference,Las Vegas, NV (United States),12-16 Apr 1992

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  • Other: DE92013117
  • Report No.: WSRC-MS--91-529
  • Report No.: CONF-920430--82
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 10142093
  • Archival Resource Key: ark:/67531/metadc1312149

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 31, 1991

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  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 12, 2018, 12:03 p.m.

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Spencer, R. B. Evaluations of glass vitrification techniques on iron ratio determinations, article, December 31, 1991; Aiken, South Carolina. (https://digital.library.unt.edu/ark:/67531/metadc1312149/: accessed March 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.