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Title: Spectroscopic and physicochemical measurements for on-line monitoring of used nuclear fuel separation processes

Abstract

Separation processes for used nuclear fuel are often complicated and challenging due to the high constraints in purity of the products and safeguards of the process streams. In order to achieve a safe, secure and efficient separation process, the liquid streams in the separation process require close monitoring. Due to the high radiation environment, sampling of the materials is difficult. Availability of a detection technique that is remote, non-destructive and can avoid time-delay caused by retrieving samples would be beneficial and could minimize the exposure to personnel and provide material accountancy to avoid diversion (non-proliferation). For example, Ultra Violet (UV), Visible (Vis), Near-Infrared (NIR) and Raman spectroscopy that detect and quantify elements present in used nuclear fuel, e.g. lanthanides, actinides and molecules such as nitrate, can be used. In this work, we have carried out NIR and Raman spectroscopy to study aqueous solutions composed of different concentrations of nitric acid, sodium nitrate, and neodymium at varied temperatures. A chemometric model for online monitoring based on the PLS-Toolbox (MATLAB) software has been developed and validated to provide chemical composition of process streams based on spectroscopic data. In conclusion, both of our NIR and Raman spectra were useful for H{sup +} andmore » NO{sub 3} prediction, and only NIR was helpful for the Nd{sup 3+} prediction.« less

Authors:
;  [1]; ;  [2]
  1. Department of Chemical Engineering and Material Science, University of California, 916 Engineering Tower, Irvine, CA 92697-2575 (United States)
  2. Pacific Northwest National Laboratory, PO BOX 999, Richland, CA 99352 (United States)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
22264133
Resource Type:
Conference
Resource Relation:
Conference: GLOBAL 2013: International Nuclear Fuel Cycle Conference - Nuclear Energy at a Crossroads, Salt Lake City, UT (United States), 29 Sep - 3 Oct 2013; Other Information: Country of input: France; 9 refs.; Related Information: In: Proceedings of GLOBAL 2013: International Nuclear Fuel Cycle Conference - Nuclear Energy at a Crossroads| 1633 p.
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; ACTINIDES; AQUEOUS SOLUTIONS; CHEMICAL COMPOSITION; COMPUTER CODES; CONCENTRATION RATIO; FORECASTING; NEODYMIUM; NEODYMIUM IONS; NITRIC ACID; NITROGEN OXIDES; NUCLEAR FUELS; RAMAN SPECTRA; RAMAN SPECTROSCOPY; SEPARATION PROCESSES; SODIUM NITRATES

Citation Formats

Nee, Ko, Nilsson, M., Bryan, S., and Levitskaia, T. Spectroscopic and physicochemical measurements for on-line monitoring of used nuclear fuel separation processes. United States: N. p., 2013. Web.
Nee, Ko, Nilsson, M., Bryan, S., & Levitskaia, T. Spectroscopic and physicochemical measurements for on-line monitoring of used nuclear fuel separation processes. United States.
Nee, Ko, Nilsson, M., Bryan, S., and Levitskaia, T. Mon . "Spectroscopic and physicochemical measurements for on-line monitoring of used nuclear fuel separation processes". United States.
@article{osti_22264133,
title = {Spectroscopic and physicochemical measurements for on-line monitoring of used nuclear fuel separation processes},
author = {Nee, Ko and Nilsson, M. and Bryan, S. and Levitskaia, T.},
abstractNote = {Separation processes for used nuclear fuel are often complicated and challenging due to the high constraints in purity of the products and safeguards of the process streams. In order to achieve a safe, secure and efficient separation process, the liquid streams in the separation process require close monitoring. Due to the high radiation environment, sampling of the materials is difficult. Availability of a detection technique that is remote, non-destructive and can avoid time-delay caused by retrieving samples would be beneficial and could minimize the exposure to personnel and provide material accountancy to avoid diversion (non-proliferation). For example, Ultra Violet (UV), Visible (Vis), Near-Infrared (NIR) and Raman spectroscopy that detect and quantify elements present in used nuclear fuel, e.g. lanthanides, actinides and molecules such as nitrate, can be used. In this work, we have carried out NIR and Raman spectroscopy to study aqueous solutions composed of different concentrations of nitric acid, sodium nitrate, and neodymium at varied temperatures. A chemometric model for online monitoring based on the PLS-Toolbox (MATLAB) software has been developed and validated to provide chemical composition of process streams based on spectroscopic data. In conclusion, both of our NIR and Raman spectra were useful for H{sup +} and NO{sub 3} prediction, and only NIR was helpful for the Nd{sup 3+} prediction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {7}
}

Conference:
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