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Title: Uranium exchange kinetics in a molten LiCl-KCl/Cd system at 500 °C

Abstract

A dissolution experiment is performed in order to examine the kinetics of uranium isotope equilibration in a molten salt and cadmium system. The salt contains a solute concentration of UCl 3 in LiCl-KCl eutectic and the cadmium contained dissolved uranium at 500 °C. A small piece of high enriched uranium is introduced to the cadmium, which perturbs the equilibrium with respect to the uranium enrichment of the salt and cadmium phases. The series of salt and cadmium samples trace how the enrichment of the two phases reach equilibrium (in the absence of a chemical driving force) over the course of approximately 24 h. Here, a model linking dissolution and isotope exchange kinetics is developed to track the evolution of uranium isotope composition. With the assumption of unaccounted salt mass incurred from the dated sample reporting practice, the model explains the trend of the measured uranium isotope composition well.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1478485
Alternate Identifier(s):
OSTI ID: 1548097
Report Number(s):
[INL/JOU-18-44721-Rev000]
[Journal ID: ISSN 0022-3115]
Grant/Contract Number:  
[AC07-05ID14517; DEAC07-05ID14517]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
[ Journal Volume: 508; Journal Issue: C]; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; pyroprocessing; molten salt; cadmium; exchange current density; uranium; electrorefining

Citation Formats

Yoo, Tae -Sic, Fredrickson, Guy L., and Teske, Gregory M. Uranium exchange kinetics in a molten LiCl-KCl/Cd system at 500 °C. United States: N. p., 2018. Web. doi:10.1016/j.jnucmat.2018.05.059.
Yoo, Tae -Sic, Fredrickson, Guy L., & Teske, Gregory M. Uranium exchange kinetics in a molten LiCl-KCl/Cd system at 500 °C. United States. doi:10.1016/j.jnucmat.2018.05.059.
Yoo, Tae -Sic, Fredrickson, Guy L., and Teske, Gregory M. Thu . "Uranium exchange kinetics in a molten LiCl-KCl/Cd system at 500 °C". United States. doi:10.1016/j.jnucmat.2018.05.059. https://www.osti.gov/servlets/purl/1478485.
@article{osti_1478485,
title = {Uranium exchange kinetics in a molten LiCl-KCl/Cd system at 500 °C},
author = {Yoo, Tae -Sic and Fredrickson, Guy L. and Teske, Gregory M.},
abstractNote = {A dissolution experiment is performed in order to examine the kinetics of uranium isotope equilibration in a molten salt and cadmium system. The salt contains a solute concentration of UCl3 in LiCl-KCl eutectic and the cadmium contained dissolved uranium at 500 °C. A small piece of high enriched uranium is introduced to the cadmium, which perturbs the equilibrium with respect to the uranium enrichment of the salt and cadmium phases. The series of salt and cadmium samples trace how the enrichment of the two phases reach equilibrium (in the absence of a chemical driving force) over the course of approximately 24 h. Here, a model linking dissolution and isotope exchange kinetics is developed to track the evolution of uranium isotope composition. With the assumption of unaccounted salt mass incurred from the dated sample reporting practice, the model explains the trend of the measured uranium isotope composition well.},
doi = {10.1016/j.jnucmat.2018.05.059},
journal = {Journal of Nuclear Materials},
number = [C],
volume = [508],
place = {United States},
year = {2018},
month = {5}
}

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