Alternative reductants for foam control during vitrification of high-iron High Level Waste (HLW) feeds

Rigby, Jessica C.; Dixon, Derek R.; Kloužek, Jaroslav; Pokorný, Richard; Thompson, Paul; Scrimshire, Alex; Kruger, Albert A.; Bell, Anthony M. T.; Bingham, Paul A.

doi:10.1016/j.jnoncrysol.2023.122240

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Cited by 4 publications

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Glass formulation and lab-scale testing of glasses designed for in-can Melter and in-container Vitrification of high-assay low-enriched uranium aqueous polishing Raffinate waste

Oshiro,

Gervasio,

Crum

et al. 2024

Journal of Nuclear Materials

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Glass formulation and lab-scale testing of glasses designed for in-can Melter and in-container Vitrification of high-assay low-enriched uranium aqueous polishing Raffinate waste

Oshiro,

Gervasio,

Crum

et al. 2024

Journal of Nuclear Materials

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Effect of feed composition on the production of off-gases during vitrification of simulated low-activity nuclear waste

Kunc,

Kloužek,

Vernerová

et al. 2023

Progress in Nuclear Energy

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Boron nitride: Novel ceramic reductant for low‐activity waste vitrification

Rigby,

Marcial,

Pokorny

et al. 2024

J Am Ceram Soc.

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During vitrification of radioactive wastes, excessive foaming reduces processing rates within melters by hindering heat transfer from the molten glass pool to the reacting melter feed. Formulations of low‐activity waste (LAW) melter feeds, for vitrification at the Waste Treatment and Immobilization Plant at the Hanford Site, conventionally include the addition of sucrose to mitigate excessive foaming by hastening the denitration process. However, incomplete combustion of sucrose produces organics such as acetonitrile (C2H3N) that may exceed bounding limits of downstream effluent treatment facilities. Using boron nitride (BN) as an alternate reductant to sucrose, in a representative LAW melter feed reduced C2H3N production by 90% by preventing the low‐temperature sucrose–nitrate reactions. Furthermore, foaming was suppressed due to the higher decomposition temperature of BN than H3BO3 meaning a delayed reaction of a large fraction of boron with the transient glass‐forming melt until above the foam onset temperature, thus reducing the quantity and viscosity of the connected melt and trapping less gas in the foam layer.

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Alternative reductants for foam control during vitrification of high-iron High Level Waste (HLW) feeds

Cited by 4 publications

References 70 publications

Glass formulation and lab-scale testing of glasses designed for in-can Melter and in-container Vitrification of high-assay low-enriched uranium aqueous polishing Raffinate waste

Glass formulation and lab-scale testing of glasses designed for in-can Melter and in-container Vitrification of high-assay low-enriched uranium aqueous polishing Raffinate waste

Effect of feed composition on the production of off-gases during vitrification of simulated low-activity nuclear waste

Boron nitride: Novel ceramic reductant for low‐activity waste vitrification

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