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Effect of sucrose on foaming and melting behavior of a low-activity waste melter feed

Result description

Reductants, such as sucrose (C12H22O11), are added to nuclear waste melter feeds containing high fractions of nitrates and nitrites to reduce excessive foaming during feed-to-glass conversion, decrease sulfate segregation, and increase technetium retention. The effect of sucrose on foaming and melting reactions during the conversion was examined using the feed volume expansion test, thermogravimetric analysis, evolved gas analysis, x-ray diffraction, and scanning electron microscopy with energy dispersive x-ray spectrometry. Different amounts of sucrose were added to vary the carbon to nitrogen (C/N) ratio in the melter feed. As the C/N ratio increased, the extent of foaming decreased, and the N-2/NO ratio increased in the evolved gas. Significant foam suppression, rapid gas release at approximately 250 degrees C, and reduction in transition metal oxides were observed at C/N > 1.1.

Keywords

cold capdenitrationfoaminglow-activity wastesucrose

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Effect of sucrose on foaming and melting behavior of a low-activity waste melter feed

  • Original language description

    Reductants, such as sucrose (C12H22O11), are added to nuclear waste melter feeds containing high fractions of nitrates and nitrites to reduce excessive foaming during feed-to-glass conversion, decrease sulfate segregation, and increase technetium retention. The effect of sucrose on foaming and melting reactions during the conversion was examined using the feed volume expansion test, thermogravimetric analysis, evolved gas analysis, x-ray diffraction, and scanning electron microscopy with energy dispersive x-ray spectrometry. Different amounts of sucrose were added to vary the carbon to nitrogen (C/N) ratio in the melter feed. As the C/N ratio increased, the extent of foaming decreased, and the N-2/NO ratio increased in the evolved gas. Significant foam suppression, rapid gas release at approximately 250 degrees C, and reduction in transition metal oxides were observed at C/N > 1.1.

  • Czech name

  • Czech description

Classification

  • Type

    Jimp - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20504 - Ceramics

Result continuities

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Journal of the American Ceramic Society

  • ISSN

    0002-7820

  • e-ISSN

  • Volume of the periodical

    102

  • Issue of the periodical within the volume

    12

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    12

  • Pages from-to

    7594-7605

  • UT code for WoS article

    000477317000001

  • EID of the result in the Scopus database

    2-s2.0-85068791883

Basic information

Result type

Jimp - Article in a specialist periodical, which is included in the Web of Science database

Jimp

OECD FORD

Ceramics

Year of implementation

2019