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Title: Application of evolved gas analysis to cold-cap reactions of melter feeds for nuclear waste vitrification

In the vitrification of nuclear wastes, the melter feed (a mixture of nuclear waste and glass-forming and modifying additives) experiences multiple gas-evolving reactions in an electrical glass-melting furnace. We employed the thermogravimetry-gas chromatography-mass spectrometry (TGA-GC-MS) combination to perform evolved gas analysis (EGA). Apart from identifying the gases evolved, we performed quantitative analysis relating the weighed sum of intensities of individual gases linearly proportional with the differential themogravimetry. The proportionality coefficients were obtained by three methods based on the stoichiometry, least squares, and calibration. The linearity was shown to be a good first-order approximation, in spite of the complicated overlapping reactions.
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Publication Date:
OSTI Identifier:
Report Number(s):
ORP-56879 Rev. 0
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
Hanford Site (HNF), Richland, WA (United States)
Sponsoring Org:
USDOE Office of Environmental Management (EM)
Contributing Orgs:
Department of Energy - Richland Operations Office; Pacific Northwest National Laboratory
Country of Publication:
United States
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES Cold-cap reactions, Evolved gas analysis, Nuclear waste vitrification, Kinetic models