Cold-cap formation from a slurry feed during nuclear waste vitrification
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F19%3A00517146" target="_blank" >RIV/67985891:_____/19:00517146 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22310/19:43918974
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0272884218335089?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0272884218335089?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ceramint.2018.12.127" target="_blank" >10.1016/j.ceramint.2018.12.127</a>
Alternative languages
Result language
angličtina
Original language name
Cold-cap formation from a slurry feed during nuclear waste vitrification
Original language description
The time-temperature history of waste slurry feed during melting strongly affects various kinetic processes, such as reaction or dissolution rates, and, consequently, the melting rate. To analyze the time-temperature history of the feed in a cold-cap during nuclear waste vitrification, this work focuses on understanding how the main cold-cap body forms, how the aqueous feed slurry interacts with the cold-cap, and estimating the cold-cap heat conductivity. To simulate the conditions during cold-cap formation, samples were prepared by rapid water evaporation from slurry feed. After water evaporated from the sample, a fresh slurry with tracer was poured onto the dry sample. X-ray fluorescence was then used to investigate the degree of penetration and/or mixing between the incoming slurry and the original sample. We show that the slurry does not interact or mix with the previously dry cold-cap crust, but that water-soluble components concentrate at the bottom of the boiling pools, where most of the water evaporates. Further, using the rate of water evaporation, the heat conductivity of the cold-cap was calculated from the measured temperature profile. The resulting conductivity is significantly higher than the values obtained in previous studies. We discuss the implications of the results for the cold-cap formation in the melter and for the development of the cold-cap mathematical model.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
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
Ceramics International
ISSN
0272-8842
e-ISSN
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Volume of the periodical
45
Issue of the periodical within the volume
5
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
6405-6412
UT code for WoS article
000459365500152
EID of the result in the Scopus database
2-s2.0-85059449631