Počet záznamů: 1  

Effect of melter feed foaming on heat flux to the cold cap

  1. 1.
    SYSNO ASEP0480534
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevEffect 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
    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. 54-65
    Poč.str.12 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovacold cap ; foam layer ; heat flux ; heat conductivity ; evolved gas
    Vědní obor RIVJH - Keramika, žáruvzdorné materiály a skla
    Obor OECDCeramics
    Institucionální podporaUSMH-B - RVO:67985891
    UT WOS000414205500006
    EID SCOPUS85028614020
    DOI10.1016/j.jnucmat.2017.09.016
    AnotaceThe 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.

    PracovištěÚstav struktury a mechaniky hornin
    KontaktMagdalena Nováková, lib@irsm.cas.cz, Tel.: 266 009 215
    Rok sběru2018