Expanded High-Level Waste Glass Property Data Development: Phase I

Schweiger, Michael J.; Riley, Brian J.; Crum, Jarrod V.; Hrma, Pavel R.; Rodriguez, Carmen P.; Arrigoni, Benjamin M.; Lang, Jesse B.; Kim, Dong-Sang; Vienna, John D.; Raszewski, F; Peeler, David K.; Edwards, T. B.; Best, D. R.; Reamer, Irene A.; Riley, W. T.; Simmons, P. T.; Workman, R. J.

doi:10.2172/1004016

Cited by 9 publications

(21 citation statements)

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“…As a result, the effect of heating rate on spinel generation by both the redox reaction and the diffusion-controlled reaction is insignificant. The TR L R value was also estimated using mathematical models reported in [35,36,37]. A model based on XRD data predicted TR L R = 1305°C, but close agreement with the measured value is fortuitous: the other three main models listed in [36] estimated TR L R in the range of 1250-1260°C.…”

Section: Methodsmentioning

confidence: 87%

Kinetic model for quartz and spinel dissolution during melting of high-level-waste glass batch

Pokorný

Rice

Crum

et al. 2013

Journal of Nuclear Materials

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The dissolution of quartz particles and the growth and dissolution of crystalline phases during the conversion of batch to glass potentially affects both the glass melting process and product quality.Crystals of spinel exiting the cold cap to molten glass below can be troublesome during the vitrification of iron-containing high-level wastes. To estimate the distribution of quartz and spinel fractions within the cold cap, we used kinetic models that relate fractions of these phases to temperature and heating rate. Fitting the model equations to data showed that the heating rate, apart from affecting quartz and spinel behavior directly, also affects them indirectly via concurrent processes, such as the formation and motion of bubbles. Because of these indirect effects, it was necessary to allow one kinetic parameter (the pre-exponential factor) to vary with the heating rate. The resulting kinetic equations are sufficiently simple for the detailed modeling of batch-to-glass conversion as it occurs in glass melters. The estimated fractions and sizes of quartz and spinel particles as they leave the cold cap, determined in this study, will provide the source terms needed for modeling the behavior of these solid particles within the flow of molten glass in the melter.

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Section: Methodsmentioning

confidence: 87%

Kinetic model for quartz and spinel dissolution during melting of high-level-waste glass batch

Pokorný

Rice

Crum

et al. 2013

Journal of Nuclear Materials

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“…Using both property reference standards, we repeated the measurements of the same glasses using our procedure to verify the results of our method. All glasses were batched and melted following the glass batching and melting procedure described by Schweiger et al…”

Section: Methodsmentioning

confidence: 99%

Thermal properties of simulated Hanford waste glasses

et al. 2017

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The Hanford Tank Waste Treatment and Immobilization Plant will vitrify the mixed hazardous wastes generated from 45 years of plutonium production at the Hanford Site in Washington State. The molten glasses will be poured into stainless steel containers or canisters and subsequently cooled for storage and disposal. For appropriate facility design and operations to handle such highly energy‐consuming processes, knowledge of the material properties is required. The thermal properties (heat capacity, thermal diffusivity, and thermal conductivity) of representative high‐level and low‐activity waste glasses were studied as functions of temperature in the range of 200°C‐800°C (relevant to the cooling process). Simultaneous differential scanning calorimetry‐thermal gravimetry (DSC‐TGA), Xe‐flash diffusivity, pycnometry, and dilatometry were implemented. The study showed that simultaneous DSC‐TGA would be a reliable method for obtaining the heat capacity of various glasses in the temperature range of interest. Accurate thermal properties from this study were shown to provide a more realistic guideline for capacity and time constraints of the heat removal process when compared to the original conservative design‐basis engineering estimates. The estimates, though useful for design in the absence of measured physical properties, can now be supplanted and the measured thermal properties can be used in design verification activities.

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“…The studies at VSL (Matlack et al 2007a(Matlack et al , 2008(Matlack et al , 2010 and PNNL Marra et al 2010;Schweiger et al 2011) applied iterative approach of repeating the formulation and testing of a set of few glasses to finally select glasses for scaled melter tests. In this approach, only selected properties are tested for all glasses and only selected glasses are fully characterized and tested in scaled melter runs.…”

Section: Existing Data On High-al 2 O 3 Glassesmentioning

confidence: 99%

“…The glass composition constraints on single component concentrations were obtained by evaluating the compositional information on the high-Al 2 O 3 glasses studied at VSL (Matlack et al 2007a(Matlack et al , 2008(Matlack et al , 2010 and PNNL Marra et al 2010;Schweiger et al 2011). Table 5.5 through Table 5.7 list the compositions and predicted properties with limited data on measured properties for the glasses evaluated for matrix design constraints.…”

Section: Matrix Design Constraintsmentioning

confidence: 99%