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Title: Laser-Induced Breakdown Spectroscopy (LIBS) Measurement of Uranium in Molten Salt

Abstract

In this current study, the molten salt aerosol–laser-induced breakdown spectroscopy (LIBS) system was used to measure the uranium (U) content in a ternary UCl 3 –LiCl–KCl salt to investigate and assess a near real-time analytical approach for material safeguards and accountability. Experiments were conducted using five different U concentrations to determine the analytical figures of merit for the system with respect to U. In the analysis, three U lines were used to develop univariate calibration curves at the 367.01 nm, 385.96 nm, and 387.10 nm lines. The 367.01 nm line had the lowest limit of detection (LOD) of 0.065 wt% U. The 385.96 nm line had the best root mean square error of cross-validation (RMSECV) of 0.20 wt% U. In addition to the univariate calibration approach, a multivariate partial least squares (PLS) model was developed to further analyze the data. Using partial least squares (PLS) modeling, an RMSECV of 0.085 wt% U was determined. The RMSECV from the multivariate approach was significantly better than the univariate case and the PLS model is recommended for future LIBS analysis. Overall, the aerosol-LIBS system performed well in monitoring the U concentration and it is expected that the system could be used to quantitatively determine the U compositions withinmore » the normal operational concentrations of U in pyroprocessing molten salts.« less

Authors:
 [1];  [1]
  1. Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1454641
Resource Type:
Published Article
Journal Name:
Applied Spectroscopy
Additional Journal Information:
Journal Name: Applied Spectroscopy Journal Volume: 72 Journal Issue: 7; Journal ID: ISSN 0003-7028
Publisher:
SAGE Publications
Country of Publication:
United States
Language:
English

Citation Formats

Williams, Ammon, and Phongikaroon, Supathorn. Laser-Induced Breakdown Spectroscopy (LIBS) Measurement of Uranium in Molten Salt. United States: N. p., 2018. Web. doi:10.1177/0003702818760311.
Williams, Ammon, & Phongikaroon, Supathorn. Laser-Induced Breakdown Spectroscopy (LIBS) Measurement of Uranium in Molten Salt. United States. doi:https://doi.org/10.1177/0003702818760311
Williams, Ammon, and Phongikaroon, Supathorn. Mon . "Laser-Induced Breakdown Spectroscopy (LIBS) Measurement of Uranium in Molten Salt". United States. doi:https://doi.org/10.1177/0003702818760311.
@article{osti_1454641,
title = {Laser-Induced Breakdown Spectroscopy (LIBS) Measurement of Uranium in Molten Salt},
author = {Williams, Ammon and Phongikaroon, Supathorn},
abstractNote = {In this current study, the molten salt aerosol–laser-induced breakdown spectroscopy (LIBS) system was used to measure the uranium (U) content in a ternary UCl 3 –LiCl–KCl salt to investigate and assess a near real-time analytical approach for material safeguards and accountability. Experiments were conducted using five different U concentrations to determine the analytical figures of merit for the system with respect to U. In the analysis, three U lines were used to develop univariate calibration curves at the 367.01 nm, 385.96 nm, and 387.10 nm lines. The 367.01 nm line had the lowest limit of detection (LOD) of 0.065 wt% U. The 385.96 nm line had the best root mean square error of cross-validation (RMSECV) of 0.20 wt% U. In addition to the univariate calibration approach, a multivariate partial least squares (PLS) model was developed to further analyze the data. Using partial least squares (PLS) modeling, an RMSECV of 0.085 wt% U was determined. The RMSECV from the multivariate approach was significantly better than the univariate case and the PLS model is recommended for future LIBS analysis. Overall, the aerosol-LIBS system performed well in monitoring the U concentration and it is expected that the system could be used to quantitatively determine the U compositions within the normal operational concentrations of U in pyroprocessing molten salts.},
doi = {10.1177/0003702818760311},
journal = {Applied Spectroscopy},
number = 7,
volume = 72,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1177/0003702818760311

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