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

Abstract

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 2O and various Tc-minerals containing reduced tetravalent Tc were used compared to tests in which pertechnetate with heptavalent Tc was used. Here, 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. Finally, 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:
 [1]; ORCiD logo [1];  [1];  [1];  [1];  [1]; ORCiD logo [2];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. USDOE Office of River Protection, Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1425497
Report Number(s):
PNNL-SA-125641
Journal ID: ISSN 0022-3115; PII: S0022311517311261
Grant/Contract Number:
AC05-76RL01830; AC02-05CH11231; AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 503; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

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., 2018. 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. Fri . "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_1425497,
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 = {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 TcO2∙2H2O and various Tc-minerals containing reduced tetravalent Tc were used compared to tests in which pertechnetate with heptavalent Tc was used. Here, 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. Finally, 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 = ,
volume = 503,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2018},
month = {Fri Mar 02 00:00:00 EST 2018}
}

Journal Article:
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