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Title: Waste form evaluation for RECl 3 and REO x fission products separated from used electrochemical salt

Abstract

The work presented here is based off the concept that the rare earth chloride (RECl3) fission products mixture within the used electrorefiner (ER) salt can be selectively removed as RECl3 (not yet demonstrated) or precipitated out as REOCl through oxygen sparging (has been demonstrated). This paper presents data showing the feasibility of immobilizing a mixture of RECl3’s at 10 mass% into a TeO2-PbO glass and it shows that this same mixture of RECl3’s can be oxidized to REOCl at 300°C and then to REOx by 1200°C. When the REOx mixture is heated at temperatures >1200°C, the ratios of REOx’s change. The mixture of REOx was then immobilized in a LABS glass at a high loading of 60 mass%. Both the TeO2-PbO glass and LABS glass systems show good chemical durability. The advantages and disadvantages of tellurite and LABS glasses are compared.

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1422291
Report Number(s):
PNNL-SA-124232
Journal ID: ISSN 0149-1970; 830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Progress in Nuclear Energy
Additional Journal Information:
Journal Volume: 104; Journal Issue: C; Journal ID: ISSN 0149-1970
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Riley, Brian J., Pierce, David A., Crum, Jarrod V., Williams, Benjamin D., Snyder, Michelle M. V., and Peterson, Jacob A. Waste form evaluation for RECl 3 and REO x fission products separated from used electrochemical salt. United States: N. p., 2018. Web. doi:10.1016/j.pnucene.2017.09.005.
Riley, Brian J., Pierce, David A., Crum, Jarrod V., Williams, Benjamin D., Snyder, Michelle M. V., & Peterson, Jacob A. Waste form evaluation for RECl 3 and REO x fission products separated from used electrochemical salt. United States. doi:10.1016/j.pnucene.2017.09.005.
Riley, Brian J., Pierce, David A., Crum, Jarrod V., Williams, Benjamin D., Snyder, Michelle M. V., and Peterson, Jacob A. Sun . "Waste form evaluation for RECl 3 and REO x fission products separated from used electrochemical salt". United States. doi:10.1016/j.pnucene.2017.09.005.
@article{osti_1422291,
title = {Waste form evaluation for RECl 3 and REO x fission products separated from used electrochemical salt},
author = {Riley, Brian J. and Pierce, David A. and Crum, Jarrod V. and Williams, Benjamin D. and Snyder, Michelle M. V. and Peterson, Jacob A.},
abstractNote = {The work presented here is based off the concept that the rare earth chloride (RECl3) fission products mixture within the used electrorefiner (ER) salt can be selectively removed as RECl3 (not yet demonstrated) or precipitated out as REOCl through oxygen sparging (has been demonstrated). This paper presents data showing the feasibility of immobilizing a mixture of RECl3’s at 10 mass% into a TeO2-PbO glass and it shows that this same mixture of RECl3’s can be oxidized to REOCl at 300°C and then to REOx by 1200°C. When the REOx mixture is heated at temperatures >1200°C, the ratios of REOx’s change. The mixture of REOx was then immobilized in a LABS glass at a high loading of 60 mass%. Both the TeO2-PbO glass and LABS glass systems show good chemical durability. The advantages and disadvantages of tellurite and LABS glasses are compared.},
doi = {10.1016/j.pnucene.2017.09.005},
journal = {Progress in Nuclear Energy},
issn = {0149-1970},
number = C,
volume = 104,
place = {United States},
year = {2018},
month = {4}
}