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Title: Comparative chemical and structural analyses of two uranium dioxide fuel pellets

Abstract

Here, a comparative investigation of the trace element, U and Pb isotopic compositions, and structural attributes of two uranium dioxide fuel pellets was conducted for nuclear forensic applications. One fuel pellet consists of natural UO 2 (0.71% 235U), while the other contains enriched UO 2 (3.98% 235U). Numerous impurities, including transition metals, lanthanides, and main group elements were detected in both fuel pellets with total trace element contents that vary between 9.77 and 11.37 μg/g. The relative abundances of the transition metal impurities in the natural UO 2 fuel pellet are linked to the source U ore and provide important insights into its provenance. X-ray fluorescence spectroscopy was utilized to investigate and compare the macro-(cm)-scale distribution of impurities within each of the fuel pellets. In addition, structural properties of the fuel pellets were examined using powder X-ray diffraction (PXRD) and Raman and infrared spectroscopy. Differences in the intensity of the T2 g U-O stretching vibrational mode were observed in the Raman spectra of the fuel pellets. Lastly, Pb isotope ratios were investigated to potentially differentiate between the natural and enriched UO 2 samples and are linked to the process history of these materials.

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [2];  [2]
  1. Univ. of Notre Dame, IN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Notre Dame, IN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1502528
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 518; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Nuclear forensics; UO2 fuel; Transition metals; Uranium deposits; Pb isotopes

Citation Formats

Spano, Tyler L., Simonetti, Antonio, Corcoran, Loretta, Smith, Philip A., Lewis, Stefanie R., and Burns, Peter C. Comparative chemical and structural analyses of two uranium dioxide fuel pellets. United States: N. p., 2019. Web. doi:10.1016/j.jnucmat.2019.02.038.
Spano, Tyler L., Simonetti, Antonio, Corcoran, Loretta, Smith, Philip A., Lewis, Stefanie R., & Burns, Peter C. Comparative chemical and structural analyses of two uranium dioxide fuel pellets. United States. doi:10.1016/j.jnucmat.2019.02.038.
Spano, Tyler L., Simonetti, Antonio, Corcoran, Loretta, Smith, Philip A., Lewis, Stefanie R., and Burns, Peter C. Thu . "Comparative chemical and structural analyses of two uranium dioxide fuel pellets". United States. doi:10.1016/j.jnucmat.2019.02.038.
@article{osti_1502528,
title = {Comparative chemical and structural analyses of two uranium dioxide fuel pellets},
author = {Spano, Tyler L. and Simonetti, Antonio and Corcoran, Loretta and Smith, Philip A. and Lewis, Stefanie R. and Burns, Peter C.},
abstractNote = {Here, a comparative investigation of the trace element, U and Pb isotopic compositions, and structural attributes of two uranium dioxide fuel pellets was conducted for nuclear forensic applications. One fuel pellet consists of natural UO2 (0.71% 235U), while the other contains enriched UO2 (3.98% 235U). Numerous impurities, including transition metals, lanthanides, and main group elements were detected in both fuel pellets with total trace element contents that vary between 9.77 and 11.37 μg/g. The relative abundances of the transition metal impurities in the natural UO2 fuel pellet are linked to the source U ore and provide important insights into its provenance. X-ray fluorescence spectroscopy was utilized to investigate and compare the macro-(cm)-scale distribution of impurities within each of the fuel pellets. In addition, structural properties of the fuel pellets were examined using powder X-ray diffraction (PXRD) and Raman and infrared spectroscopy. Differences in the intensity of the T2g U-O stretching vibrational mode were observed in the Raman spectra of the fuel pellets. Lastly, Pb isotope ratios were investigated to potentially differentiate between the natural and enriched UO2 samples and are linked to the process history of these materials.},
doi = {10.1016/j.jnucmat.2019.02.038},
journal = {Journal of Nuclear Materials},
number = C,
volume = 518,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
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This content will become publicly available on February 28, 2020
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