Conversion kinetics during melting of simulated nuclear waste glass feeds measured by dissolution of silica

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925528" target="_blank" >RIV/60461373:22310/22:43925528 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22340/22:43925528 RIV/60461373:22810/22:43925528
Result on the web
<a href="https://doi.org/10.1016/j.jnoncrysol.2021.121363" target="_blank" >https://doi.org/10.1016/j.jnoncrysol.2021.121363</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnoncrysol.2021.121363" target="_blank" >10.1016/j.jnoncrysol.2021.121363</a>

Result language
angličtina
Original language name
Conversion kinetics during melting of simulated nuclear waste glass feeds measured by dissolution of silica
Original language description
We experimentally investigated the batch-to-glass conversion kinetics of two low-activity and two high-level nuclear waste melter feeds that represent widely different behavior during melting; tests comprised thermogravimetric analysis, the feed expansion test, evolved gas analysis, and x-ray diffraction. Our study indicates that the conversion processes, which include gas-evolving reactions, dissolution of crystalline phases, and primary foam expansion and collapse, are interconnected and influenced by the feed's thermal history. The fraction of dissolved silica was adopted as a measure of the extent of conversion inside the cold cap—the floating layer of feed material on the top surface of the melt in an electric melter. The interface between the cold cap and the free-flowing melt below was associated with a constant fraction of dissolved silica. The estimated viscosity of glass-forming melt at this interface lies within a narrow range for the feeds studied.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GA19-14179S" target="_blank" >GA19-14179S: In-situ analysis of foam layer behavior at the batch-melt interface using laboratory-scale melter vessel</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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