skip to main content

DOE PAGESDOE PAGES

This content will become publicly available on May 1, 2019

Title: Effect of Technetium-99 sources on its retention in low activity waste glass

© 2018 Small-scale crucible melting tests on simulated waste glass were performed with technetium-99 (Tc-99) introduced as different species in a representative low activity waste simulant. The glass saw an increase in Tc-99 retention when TcO 2 ∙2H 2 O and various Tc-minerals containing reduced tetravalent Tc were used compared to tests in which pertechnetate with heptavalent Tc was used. We postulate that the increase of Tc retention is likely caused by different reaction paths for Tc incorporation into glass during early stages of melting, rather than the low volatility of reduced tetravalent Tc compounds, which has been a generally accepted idea. Additional studies are needed to clarify the exact mechanisms relevant to the effect of reduced Tc compounds on Tc incorporation into or volatilization from the glass melt.
Authors:
; ORCiD logo ; ; ; ; ; ORCiD logo ;
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 503; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
SC-22.1 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
Country of Publication:
United States
Language:
English
OSTI Identifier:
1436676

Luksic, Steven A., Kim, Dong-Sang, Um, Wooyong, Wang, Guohui, Schweiger, Michael J., Soderquist, Chuck Z., Lukens, Wayne, and Kruger, Albert A.. Effect of Technetium-99 sources on its retention in low activity waste glass. United States: N. p., Web. doi:10.1016/j.jnucmat.2018.02.019.
Luksic, Steven A., Kim, Dong-Sang, Um, Wooyong, Wang, Guohui, Schweiger, Michael J., Soderquist, Chuck Z., Lukens, Wayne, & Kruger, Albert A.. Effect of Technetium-99 sources on its retention in low activity waste glass. United States. doi:10.1016/j.jnucmat.2018.02.019.
Luksic, Steven A., Kim, Dong-Sang, Um, Wooyong, Wang, Guohui, Schweiger, Michael J., Soderquist, Chuck Z., Lukens, Wayne, and Kruger, Albert A.. 2018. "Effect of Technetium-99 sources on its retention in low activity waste glass". United States. doi:10.1016/j.jnucmat.2018.02.019.
@article{osti_1436676,
title = {Effect of Technetium-99 sources on its retention in low activity waste glass},
author = {Luksic, Steven A. and Kim, Dong-Sang and Um, Wooyong and Wang, Guohui and Schweiger, Michael J. and Soderquist, Chuck Z. and Lukens, Wayne and Kruger, Albert A.},
abstractNote = {© 2018 Small-scale crucible melting tests on simulated waste glass were performed with technetium-99 (Tc-99) introduced as different species in a representative low activity waste simulant. The glass saw an increase in Tc-99 retention when TcO 2 ∙2H 2 O and various Tc-minerals containing reduced tetravalent Tc were used compared to tests in which pertechnetate with heptavalent Tc was used. We postulate that the increase of Tc retention is likely caused by different reaction paths for Tc incorporation into glass during early stages of melting, rather than the low volatility of reduced tetravalent Tc compounds, which has been a generally accepted idea. Additional studies are needed to clarify the exact mechanisms relevant to the effect of reduced Tc compounds on Tc incorporation into or volatilization from the glass melt.},
doi = {10.1016/j.jnucmat.2018.02.019},
journal = {Journal of Nuclear Materials},
number = C,
volume = 503,
place = {United States},
year = {2018},
month = {5}
}