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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F17%3A00480534" target="_blank" >RIV/67985891:_____/17:00480534 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/17:43914564

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jnucmat.2017.09.016" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2017.09.016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jnucmat.2017.09.016" target="_blank" >10.1016/j.jnucmat.2017.09.016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.nn

Název v anglickém jazyce

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

Popis výsledku anglicky

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.nn

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

—

Svazek periodika

496

Číslo periodika v rámci svazku

DEC 1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

54-65

Kód UT WoS článku

000414205500006

EID výsledku v databázi Scopus

2-s2.0-85028614020