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Title: Relative impact of H 2 O and O 2 in the oxidation of UO 2 powders from 50 to 300 °C

Abstract

Here, we studied the reaction of water and molecular oxygen with stoichiometric uranium dioxide (i.e. UO 2) powder at elevated temperature by high-resolution x-ray photoelectron spectroscopy (XPS), infrared (IR) spectroscopy, powder x-ray diffraction (XRD), and scanning electron microscopy (SEM). We observed and quatified oxidation resulting from the dissociative chemisorption of the adsorbing molecules and subsequent incorporation into the oxide lattice. Molecular oxygen was found to be a stronger oxidation agent than water at elevated temperatures but not at ambient.

Authors:
 [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1416493
Alternate Identifier(s):
OSTI ID: 1549268
Report Number(s):
LLNL-JRNL-732898
Journal ID: ISSN 0022-3115; TRN: US1800939
Grant/Contract Number:  
AC52-07NA27344; LL15-U_Surface_Oxidation-NDD3B
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 496; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY

Citation Formats

Donald, Scott B., Davisson, M. Lee, Dai, Zurong, Roberts, Sarah K., and Nelson, Art J. Relative impact of H 2 O and O 2 in the oxidation of UO 2 powders from 50 to 300 °C. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.10.014.
Donald, Scott B., Davisson, M. Lee, Dai, Zurong, Roberts, Sarah K., & Nelson, Art J. Relative impact of H 2 O and O 2 in the oxidation of UO 2 powders from 50 to 300 °C. United States. doi:10.1016/j.jnucmat.2017.10.014.
Donald, Scott B., Davisson, M. Lee, Dai, Zurong, Roberts, Sarah K., and Nelson, Art J. Wed . "Relative impact of H 2 O and O 2 in the oxidation of UO 2 powders from 50 to 300 °C". United States. doi:10.1016/j.jnucmat.2017.10.014. https://www.osti.gov/servlets/purl/1416493.
@article{osti_1416493,
title = {Relative impact of H 2 O and O 2 in the oxidation of UO 2 powders from 50 to 300 °C},
author = {Donald, Scott B. and Davisson, M. Lee and Dai, Zurong and Roberts, Sarah K. and Nelson, Art J.},
abstractNote = {Here, we studied the reaction of water and molecular oxygen with stoichiometric uranium dioxide (i.e. UO2) powder at elevated temperature by high-resolution x-ray photoelectron spectroscopy (XPS), infrared (IR) spectroscopy, powder x-ray diffraction (XRD), and scanning electron microscopy (SEM). We observed and quatified oxidation resulting from the dissociative chemisorption of the adsorbing molecules and subsequent incorporation into the oxide lattice. Molecular oxygen was found to be a stronger oxidation agent than water at elevated temperatures but not at ambient.},
doi = {10.1016/j.jnucmat.2017.10.014},
journal = {Journal of Nuclear Materials},
number = C,
volume = 496,
place = {United States},
year = {2017},
month = {10}
}

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