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Title: Oxidation kinetics for conversion of U 3O 8 to ε-UO 3 with NO 2

Abstract

The oxidation kinetics of U 3O 8 powder to ε-UO 3 in an NO 2 environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250°C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO 3 polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1408674
Alternate Identifier(s):
OSTI ID: 1419346
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 490; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY

Citation Formats

Johnson, J. A., Rawn, C. J., Spencer, B. B., Meisner, R. A., and Del Cul, G. D. Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.03.048.
Johnson, J. A., Rawn, C. J., Spencer, B. B., Meisner, R. A., & Del Cul, G. D. Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2. United States. doi:10.1016/j.jnucmat.2017.03.048.
Johnson, J. A., Rawn, C. J., Spencer, B. B., Meisner, R. A., and Del Cul, G. D. Tue . "Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2". United States. doi:10.1016/j.jnucmat.2017.03.048. https://www.osti.gov/servlets/purl/1408674.
@article{osti_1408674,
title = {Oxidation kinetics for conversion of U3O8 to ε-UO3 with NO2},
author = {Johnson, J. A. and Rawn, C. J. and Spencer, B. B. and Meisner, R. A. and Del Cul, G. D.},
abstractNote = {The oxidation kinetics of U3O8 powder to ε-UO3 in an NO2 environment was measured by in situ x-ray diffraction (XRD). Experiments were performed at temperatures of 195, 210, 235, and 250°C using a custom designed and fabricated sample isolation stage. Data were refined to quantify phase fractions using a newly proposed structure for the ε-UO3 polymorph. The kinetics data were modeled using a shrinking core approach. A proposed two-step reaction process is presented based on the developed models.},
doi = {10.1016/j.jnucmat.2017.03.048},
journal = {Journal of Nuclear Materials},
number = C,
volume = 490,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
}

Journal Article:
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