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

Luksic, Steven A.; Kim, Dong Sang; Um, Wooyong; Wang, Guohui; Schweiger, Michael J.; Soderquist, Chuck Z.; Lukens, Wayne; Kruger, Albert A.

doi:10.1016/J.JNUCMAT.2018.02.019

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

Abstract

© 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:

Luksic, Steven A. ^[1];

^[1]; Um, Wooyong ^[1]; Wang, Guohui ^[1]; Schweiger, Michael J. ^[1]; Soderquist, Chuck Z. ^[1];

^[2]; Kruger, Albert A. ^[3]

Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
USDOE Office of River Protection, Richland, WA (United States)

Publication Date:: 2018-03-02

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); SC-22.1 USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division

OSTI Identifier:: 1425497

Alternate Identifier(s):: OSTI ID: 1436676; OSTI ID: 1548661

Report Number(s):: PNNL-SA-125641
Journal ID: ISSN 0022-3115; PII: S0022311517311261; TRN: US1802122

Grant/Contract Number:: AC05-76RL01830; AC02-05CH11231; AC02-76SF00515

Resource Type:: 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.

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                    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.  https://doi.org/10.1016/J.JNUCMAT.2018.02.019

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                    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.  https://doi.org/10.1016/J.JNUCMAT.2018.02.019.  https://www.osti.gov/servlets/purl/1425497.

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@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 = {© 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       = ,

  volume       = 503,

  place        = {United States},

  year         = {2018},

  month        = {3}

}

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Figure 1: Tc-trevorite from Fe(OH)₂ by SEM

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