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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60461373:22340/22:43925528 RIV/60461373:22810/22:43925528

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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&apos;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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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&apos;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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA19-14179S" target="_blank" >GA19-14179S: In-situ analýza chování vrstvy pěny na rozhraní kmene a taveniny za použití modelové tavicí pece</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Non-crystalline Solids

ISSN

0022-3093

e-ISSN

1873-4812

Svazek periodika

579

Číslo periodika v rámci svazku

1 March 2022

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

nestrankovano

Kód UT WoS článku

000754658400007

EID výsledku v databázi Scopus

2-s2.0-85123196402