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Title: Thermodynamic evaluation of LiCl-KCl-PuCl 3 system

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1397872
Grant/Contract Number:
13–4908
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 695; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:31:22; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Zhou, Wentao, and Zhang, Jinsuo. Thermodynamic evaluation of LiCl-KCl-PuCl 3 system. Netherlands: N. p., 2017. Web. doi:10.1016/j.jallcom.2016.11.092.
Zhou, Wentao, & Zhang, Jinsuo. Thermodynamic evaluation of LiCl-KCl-PuCl 3 system. Netherlands. doi:10.1016/j.jallcom.2016.11.092.
Zhou, Wentao, and Zhang, Jinsuo. Wed . "Thermodynamic evaluation of LiCl-KCl-PuCl 3 system". Netherlands. doi:10.1016/j.jallcom.2016.11.092.
@article{osti_1397872,
title = {Thermodynamic evaluation of LiCl-KCl-PuCl 3 system},
author = {Zhou, Wentao and Zhang, Jinsuo},
abstractNote = {},
doi = {10.1016/j.jallcom.2016.11.092},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 695,
place = {Netherlands},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jallcom.2016.11.092

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • Equilibrium diagrams for the binary systems PuCl/sub 3/-LiCl and PuCl/ sub 3/-NaCl were studied over the temperature range 100 to 825 deg by thermal and differential thermal analysis techniques. A single eutetic was observed in each system with no evidence of solid solution or compound formation. The eutectic occurred at 461 deg C and 28 mole% PuCl/sub 3/ in the PuCl/sub 3/-LiCl system and at 453 deg C and 36 mole% PuCl/sub 3/ in the PuCl/sub 3/-NaCl system. The melting points of LiCl, NaCl and PuCl/sub 3/ in equilibrium with an atmosphere of anhydrous HCl were 607 plus or minusmore » 2 deg , 802 plus or minus 2 deg and 767 plus or minus 2 deg C, respectively. Within experimental error, the same values were obtained for the melting points of these salts under vacuum. (auth)« less
  • KCl solution at various compositions are reported. (auth)
  • Key electrochemical properties affecting pyroprocessing of nuclear fuel were examined in four eutectic melts using using Eu3+/2+ as a representative probe. We report the electrochemical and spectroelectrochemical behavior of EuCl3 in four molten salt eutectics (3 LiCl – NaCl, 3 LiCl – 2 KCl, LiCl – RbCl and 3 LiCl – 2 CsCl) at 873 K. Cyclic voltammetry was used to determine the redox potential for Eu3+/2+ and the applied potentials for spectroelectrochemistry. Single step chronoabsorptometry and thin-layer spectroelectrochemistry were used to obtain the number of electrons transferred, redox potentials and diffusion coefficients for Eu3+ in each eutectic melt. Themore » redox potentials determined by thin-layer spectroelectrochemistry were extremely close to those obtained using cyclic voltammetry. The redox potential for Eu3+/2+ was most positive in the 3 LiCl - NaCl melt, showed a negative shift in the 3 LiCl - 2 KCl melt, and was the most negative in the LiCl - RbCl and 3 LiCl - 2 CsCl eutectics. The diffusion coefficient for Eu3+ followed this same trend; it was the largest in the 3 LiCl - NaCl melt and the smallest in the LiCl - RbCl and 3 LiCl - 2 CsCl melts. The basic one-electron reversible electron transfer for Eu3+/2+ was not changed by melt composition.« less
  • Here we report the effect of changing the eutectic melt composition on the electrochemical properties of europium(III) chloride under pyroprocessing conditions. The number of electrons transferred, redox potentials and diffusion coefficients were determined using various electrochemical and spectroelectrochemical techniques in four different eutectic mixtures (3 LiCl - NaCl, 3 LiCl - 2 KCl, 3 LiCl - RbCl, and 3 LiCl - 2 CsCl) while varying the temperature of the melt. It was determined that Eu3+ undergoes a one electron reduction to Eu2+ in each melt at all temperatures evaluated. Within all the melts a positive shift in the redox potentialmore » as well as an increase in the diffusion coefficient for Eu3+ was observed as the temperature increased. Also observed was a positive shift in the redox potential and increase in the diffusion coefficient for Eu3+ as the weighted average of the cationic radii for the melt decreased.« less