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Effect of melter feed foaming on heat flux to the cold cap
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SYSNO ASEP 0480534 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of melter feed foaming on heat flux to the cold cap Tvůrce(i) Lee, S. (US)
Hrma, P. (US)
Pokorný, R. (CZ)
Kloužek, Jaroslav (USMH-B) RID, ORCID, SAI
VanderVeer, B.J. (US)
Dixon, D.R. (US)
Luksic, S.A. (US)
Rodriguez, C.P. (US)
Chun, J. (US)
Schweiger, M. J. (US)
Kruger, A.A. (US)Zdroj.dok. Journal of Nuclear Materials. - : Elsevier - ISSN 0022-3115
Roč. 496, DEC 1 (2017), s. 54-65Poč.str. 12 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova cold cap ; foam layer ; heat flux ; heat conductivity ; evolved gas Vědní obor RIV JH - Keramika, žáruvzdorné materiály a skla Obor OECD Ceramics Institucionální podpora USMH-B - RVO:67985891 UT WOS 000414205500006 EID SCOPUS 85028614020 DOI 10.1016/j.jnucmat.2017.09.016 Anotace The glass production rate, which is crucial for the nuclear waste clean up lifecycle, is influenced by the chemical and mineralogical nature of melter feed constituents. The choice of feed materials affects both the conversion heat and the thickness of the foam layer that forms at the bottom of the cold cap and controls the heat flow from molten glass. We demonstrate this by varying the alumina source, namely, substituting boehmite or corundum for gibbsite, in a high-alumina high-level-waste melter feed. The extent of foaming was determined using the volume expansion test and the conversion heat with differential scanning calorimetry. Evolved gas analysis was used to identify gases responsible for the formation of primary and secondary foam. The foam thickness, a critical factor in the rate of melting, was estimated using known values of heat conductivities and melting rates. The result was in reasonable agreement with the foam thickness experimentally observed in quenched cold caps from the laboratory scale melter.
Pracoviště Ústav struktury a mechaniky hornin Kontakt Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Rok sběru 2018
Počet záznamů: 1