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Title: Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides

Abstract

This paper presents results of our continuing investigation on the use of nitrogen trifluoride as a fluorination or fluorination/oxidation agent for separating valuable constituents from used nuclear fuels by exploiting the different volatilities of the constituent fission product and actinide fluorides. This article focuses on fission products that do not have volatile fluorides or oxyfluorides at expected operations temperatures. Our thermodynamic calculations show that nitrogen trifluoride has the potential to completely fluorinate fission product oxides to their fluorides. Simultaneous thermogravimetric and differential thermal analyses show that the oxides of cobalt, zirconium, and the lanthanides are fluorinated but do not form volatile fluorides when treated with nitrogen trifluoride at temperatures up to 550°C. Our studies of gadolinium-doped commercial nuclear fuel indicate that nitrogen trifluoride can extract uranium from the non-volatile gadolinium.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1080140
Report Number(s):
PNNL-SA-89166
AF5805000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Fluorine Chemistry, 146:86-97
Additional Journal Information:
Journal Name: Journal of Fluorine Chemistry, 146:86-97
Country of Publication:
United States
Language:
English

Citation Formats

Scheele, Randall D., McNamara, Bruce K., Casella, Andrew M., Kozelisky, Anne E., and Neiner, Doinita. Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides. United States: N. p., 2013. Web. doi:10.1016/j.jfluchem.2012.12.013.
Scheele, Randall D., McNamara, Bruce K., Casella, Andrew M., Kozelisky, Anne E., & Neiner, Doinita. Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides. United States. doi:10.1016/j.jfluchem.2012.12.013.
Scheele, Randall D., McNamara, Bruce K., Casella, Andrew M., Kozelisky, Anne E., and Neiner, Doinita. Fri . "Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides". United States. doi:10.1016/j.jfluchem.2012.12.013.
@article{osti_1080140,
title = {Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides},
author = {Scheele, Randall D. and McNamara, Bruce K. and Casella, Andrew M. and Kozelisky, Anne E. and Neiner, Doinita},
abstractNote = {This paper presents results of our continuing investigation on the use of nitrogen trifluoride as a fluorination or fluorination/oxidation agent for separating valuable constituents from used nuclear fuels by exploiting the different volatilities of the constituent fission product and actinide fluorides. This article focuses on fission products that do not have volatile fluorides or oxyfluorides at expected operations temperatures. Our thermodynamic calculations show that nitrogen trifluoride has the potential to completely fluorinate fission product oxides to their fluorides. Simultaneous thermogravimetric and differential thermal analyses show that the oxides of cobalt, zirconium, and the lanthanides are fluorinated but do not form volatile fluorides when treated with nitrogen trifluoride at temperatures up to 550°C. Our studies of gadolinium-doped commercial nuclear fuel indicate that nitrogen trifluoride can extract uranium from the non-volatile gadolinium.},
doi = {10.1016/j.jfluchem.2012.12.013},
journal = {Journal of Fluorine Chemistry, 146:86-97},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {2}
}