Effect of alumina source on the retention of rhenium during low-activity waste feed conversion to glass

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985891%3A_____%2F24%3A00597600" target="_blank" >RIV/67985891:_____/24:00597600 - isvavai.cz</a>

Alternative codes found

RIV/61389013:_____/24:00597600 RIV/60461373:22310/24:43930992 RIV/60461373:22810/24:43930992

Result on the web

<a href="https://doi.org/10.1016/j.ceramint.2024.08.067" target="_blank" >https://doi.org/10.1016/j.ceramint.2024.08.067</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ceramint.2024.08.067" target="_blank" >10.1016/j.ceramint.2024.08.067</a>

Result language

angličtina

Original language name

Effect of alumina source on the retention of rhenium during low-activity waste feed conversion to glass

Original language description

Volatility of technetium poses a challenge during the vitrification of low-activity waste (LAW) feed to glass. Although this is typically resolved through recycle loops, this can lead to other problems, such as sulfate phase formation. Thus, ensuring high single-pass retention of Tc (or Re, its non-radioactive surrogate) is required for enabling high waste-loading formulations. In our previous study, we observed significantly higher Re retention in final waste glass produced from a LAW melter feed containing gibbsite as the alumina source compared to a compositionally similar feed containing kyanite. To investigate this effect, we prepared representative LAW melter feeds with kyanite and gibbsite as alumina sources and measured the Re retention in the produced glasses. We found that the Re retention is consistently higher in glasses produced with gibbsite, by up to 20 %. We attribute this result to the formation of nanocrystalline alumina in melter feeds containing gibbsite. Possessing a high surface area, nanocrystalline alumina can adsorb the perrhenate-containing molten salt, increasing the rate at which Re is incorporated into the alkali-alumino-boro-silicate glass-forming melt. In addition, we demonstrate that replacing kyanite with gibbsite in LAW melter feeds has no adverse effects on their processing during vitrification.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20504 - Ceramics

Project

<a href="/en/project/GA24-11616S" target="_blank" >GA24-11616S: Effect of reducing agents and glass-forming additives on the behavior of rhenium and its retention during vitrification of nuclear waste</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

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

Name of the periodical

Ceramics International

ISSN

0272-8842

e-ISSN

1873-3956

Volume of the periodical

50

Issue of the periodical within the volume

21

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

42229-42236

UT code for WoS article

001329995700001

EID of the result in the Scopus database

2-s2.0-85200804955