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Title: Chemical and Isotopic Characterization of Noble Metal Phase from Commercial UO 2 Fuel

Abstract

We report elemental and isotopic analysis for the noble metal fission product phase found in irradiated nuclear fuel. The noble metal phase was isolated from three commercial irradiated UO 2 fuels by chemically dissolving the UO 2 fuel matrix, leaving the noble metal phase as the undissolved residue. Macro amounts of this residue were dissolved using a KOH+KNO 3 fusion and then chemically separated into individual elements for analysis by mass spectrometry. Though the composition of this phase has been previously reported, this work is the most comprehensive chemical analysis of the isolated noble metal phase to date. We report both elemental and isotopic abundances of the five major components of the noble metal phase (Mo, Tc, Ru, Rh, Pd). Additionally, we report a sixth element present in high quantities in this phase, tellurium. Tellurium appears to be an integral component of noble metal particles.

Authors:
 [1];  [2];  [2];  [2];  [3];  [3]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); IB3 Global Solutions, Oak Ridge, TN (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Oregon State Univ., Corvallis, OR (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1543302
Report Number(s):
PNNL-SA-138098
Journal ID: ISSN 0003-2700
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Analytical Chemistry
Additional Journal Information:
Journal Volume: 91; Journal Issue: 10; Journal ID: ISSN 0003-2700
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English

Citation Formats

Pellegrini, Kristi L., Soderquist, Chuck Z., Shen, Steve D., Krogstad, Eirik J., Palmer, Camille J., Gerez, Kyzer R., Buck, Edgar C., Lach, Timothy G., Schwantes, Jon M., and Clark, Richard A. Chemical and Isotopic Characterization of Noble Metal Phase from Commercial UO2 Fuel. United States: N. p., 2019. Web. doi:10.1021/acs.analchem.8b05549.
Pellegrini, Kristi L., Soderquist, Chuck Z., Shen, Steve D., Krogstad, Eirik J., Palmer, Camille J., Gerez, Kyzer R., Buck, Edgar C., Lach, Timothy G., Schwantes, Jon M., & Clark, Richard A. Chemical and Isotopic Characterization of Noble Metal Phase from Commercial UO2 Fuel. United States. doi:10.1021/acs.analchem.8b05549.
Pellegrini, Kristi L., Soderquist, Chuck Z., Shen, Steve D., Krogstad, Eirik J., Palmer, Camille J., Gerez, Kyzer R., Buck, Edgar C., Lach, Timothy G., Schwantes, Jon M., and Clark, Richard A. Thu . "Chemical and Isotopic Characterization of Noble Metal Phase from Commercial UO2 Fuel". United States. doi:10.1021/acs.analchem.8b05549.
@article{osti_1543302,
title = {Chemical and Isotopic Characterization of Noble Metal Phase from Commercial UO2 Fuel},
author = {Pellegrini, Kristi L. and Soderquist, Chuck Z. and Shen, Steve D. and Krogstad, Eirik J. and Palmer, Camille J. and Gerez, Kyzer R. and Buck, Edgar C. and Lach, Timothy G. and Schwantes, Jon M. and Clark, Richard A.},
abstractNote = {We report elemental and isotopic analysis for the noble metal fission product phase found in irradiated nuclear fuel. The noble metal phase was isolated from three commercial irradiated UO2 fuels by chemically dissolving the UO2 fuel matrix, leaving the noble metal phase as the undissolved residue. Macro amounts of this residue were dissolved using a KOH+KNO3 fusion and then chemically separated into individual elements for analysis by mass spectrometry. Though the composition of this phase has been previously reported, this work is the most comprehensive chemical analysis of the isolated noble metal phase to date. We report both elemental and isotopic abundances of the five major components of the noble metal phase (Mo, Tc, Ru, Rh, Pd). Additionally, we report a sixth element present in high quantities in this phase, tellurium. Tellurium appears to be an integral component of noble metal particles.},
doi = {10.1021/acs.analchem.8b05549},
journal = {Analytical Chemistry},
number = 10,
volume = 91,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
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This content will become publicly available on April 25, 2020
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