Hanford SPA Glasses: Fabrication, Characterization, and Chemical Analysis

Peeler, David K.

doi:10.2172/799705

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…In a separate study, Peeler et al (2001) determined the formation of spinel-type phases was responsible for similar features. In that study, SEM-EDS analysis of similar dull brown cross-sections indicated the crystals were enriched in Fe, Ni, Mn, and Cr with subsequent XRD analysis identifying various spineltype phases.…”

Section: Homogeneitymentioning

confidence: 99%

Development of High Waste Loading Glasses for Advanced Melter Technologies

Peeler¹

2002

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Executive SummaryWaste streams at the U.S. Department of Energy's (DOE's) Hanford and Savannah River sites contain a varied array of chemical compounds, a number of which can limit the waste loading or cause operating difficulties with melt rate or equipment corrosion. One such stream is the Hanford C-106/AY-102 High Level Waste (HLW) simulant which represents a blend of tanks that will be processed during initial HLW vitrification efforts at Hanford. The non-radioactive surrogate is based on a specific Hanford waste stream but will also provide valuable information to the Savannah River Site (SRS) -given the relatively high concentrations of Fe 2 O 3 , Cr 2 O 3 , and Al 2 O 3 and the cross-cutting assessment of the strontium/transuranic (TRU) precipitation or permanganate-based pretreatment process being considered at both sites.The vitrification programs at Hanford and Savannah River may benefit from higher temperature glass formulations that are processable in advanced melters (e.g., induction-heated, cold-crucible melter (ICCM)) or by changing the current liquidus temperature (T L ) limit for Joule heated ceramic melters (JHCM).The focus of this report was on the glass formulation activities in support of the ICCM and JHCM demonstrations with C-106/AY-102 simulant. The intent was to provide preliminary (non-optimized) glass formulations for a specific waste stream that met processing requirements, DOE product quality specifications, and programmatic objectives for the two melter types.In general, the glasses developed (with waste loadings of ≥ 60 mass%) were very prone to devitrification (especially upon centerline canister cooling). The Product Consistency Test (PCT) response was primarily driven by the type and extent of crystallization and its ultimate impact on the residual glass matrix. Although the formation of nepheline was the primary suspect for the negative impact on durability in some glasses, its formation had little or no impact in other glasses -indicating that the residual glass matrix for each of these glasses is durable and acceptable.

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Section: Homogeneitymentioning

confidence: 99%

Development of High Waste Loading Glasses for Advanced Melter Technologies

Peeler¹

2002

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“…understand the range of composition acceptable for processing including concentrations of manganese that exceed those required by this process option. 23,24 Recently, personnel successfully demonstrated the vitrification of an actual waste sample from Hanford after treatment with an analogous permanganate process. 25,26 The manganese content of this waste reached as high as 3.53 wt % (expressed as MnO) in these experiments, compared to an expected maximum value of 2.6 wt % for Savannah River Site wastes.…”

Section: Technical Basesmentioning

confidence: 99%

Status Assessment of Readiness to Deploy Permanganate Treatment for Removal of Strontium and Actinides from Savannah River Site High Level Waste

Fink¹

2002

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Hanford SPA Glasses: Fabrication, Characterization, and Chemical Analysis

Cited by 2 publications

References 4 publications

Development of High Waste Loading Glasses for Advanced Melter Technologies

Development of High Waste Loading Glasses for Advanced Melter Technologies

Status Assessment of Readiness to Deploy Permanganate Treatment for Removal of Strontium and Actinides from Savannah River Site High Level Waste

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