TY - JOUR
T1 - Quantitative analysis of trivalent uranium and lanthanides in a molten chloride by absorption spectrophotometry
AU - Fujii, Toshiyuki
AU - Uda, Takeshi
AU - Fukasawa, Kazuhito
AU - Uehara, Akihiro
AU - Sato, Nobuaki
AU - Nagai, Takayuki
AU - Kinoshita, Kensuke
AU - Koyama, Tadafumi
AU - Yamana, Hajimu
N1 - Funding Information:
Acknowledgments Parts of this study are the results of ‘‘Development of metal fuel cycle technology for closing FBR fuel cycle’’ entrusted to CRIEPI by the Ministry of Education, Culture, Sports, Science and Technology (MEXT).
PY - 2013/4
Y1 - 2013/4
N2 - As an analytical application for pyrochemical reprocessing using molten salts, quantitative analysis of uranium and lanthanides by UV/Vis/NIR absorption spectrophotometry was performed. Electronic absorption spectra of LiCl-KCl eutectic at 773 K including trivalent uranium and eight rare earth elements (Y, La, Ce, Pr, Nd, Sm, Eu, and Gd as fission product elements) were measured in the wavenumber region of 4,500-33,000 cm-1. The composition of the solutes was simulated for a reductive extraction condition in a pyroreprocessing process for spent nuclear fuels, that is, about 2 wt% U and 0.1-2 wt% rare earth elements. Since U(III) possesses strong absorption bands due to f-d transitions, an optical quartz cell with short light path length of 1 mm was adopted in the analysis. The quantitative analysis of trivalent U, Nd, Pr, and Sm was possible with their f-f transition intensities in the NIR region. The analytical results agree with the prepared concentrations within 2σ experimental uncertainties.
AB - As an analytical application for pyrochemical reprocessing using molten salts, quantitative analysis of uranium and lanthanides by UV/Vis/NIR absorption spectrophotometry was performed. Electronic absorption spectra of LiCl-KCl eutectic at 773 K including trivalent uranium and eight rare earth elements (Y, La, Ce, Pr, Nd, Sm, Eu, and Gd as fission product elements) were measured in the wavenumber region of 4,500-33,000 cm-1. The composition of the solutes was simulated for a reductive extraction condition in a pyroreprocessing process for spent nuclear fuels, that is, about 2 wt% U and 0.1-2 wt% rare earth elements. Since U(III) possesses strong absorption bands due to f-d transitions, an optical quartz cell with short light path length of 1 mm was adopted in the analysis. The quantitative analysis of trivalent U, Nd, Pr, and Sm was possible with their f-f transition intensities in the NIR region. The analytical results agree with the prepared concentrations within 2σ experimental uncertainties.
KW - Absorption spectrophotometry
KW - Chloride
KW - Lanthanide
KW - Molten salt
KW - Pyroreprocessing
KW - Uranium
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U2 - 10.1007/s10967-012-2008-3
DO - 10.1007/s10967-012-2008-3
M3 - Article
AN - SCOPUS:84884212602
VL - 296
SP - 255
EP - 259
JO - Journal of Radioanalytical and Nuclear Chemistry
JF - Journal of Radioanalytical and Nuclear Chemistry
SN - 0022-4081
IS - 1
ER -
