Potentiometric Sensor for Real-Time Monitoring of Multivalent Ion Concentrations in Molten Salt Metadata

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Title

  • Main Title Potentiometric Sensor for Real-Time Monitoring of Multivalent Ion Concentrations in Molten Salt

Creator

  • Author: Zink, Peter A.
    Creator Type: Personal
  • Author: Jue, Jan-Fong
    Creator Type: Personal
  • Author: Serrano, Brenda E.
    Creator Type: Personal
  • Author: Fredrickson, Guy L.
    Creator Type: Personal
  • Author: Cowan, Ben F.
    Creator Type: Personal
  • Author: Herrmann, Steven D.
    Creator Type: Personal
  • Author: Li, Shelly X.
    Creator Type: Personal

Contributor

  • Sponsor: United States. National Nuclear Security Administration.
    Contributor Type: Organization
    Contributor Info: DOE - NA

Publisher

  • Name: Idaho National Laboratory
    Place of Publication: Idaho Falls, Idaho
    Additional Info: Idaho National Laboratory (INL)

Date

  • Creation: 2010-07-01

Language

  • English

Description

  • Content Description: Electrorefining of spent metallic nuclear fuel in high temperature molten salt systems is a core technology in pyroprocessing, which in turn plays a critical role in the development of advanced fuel cycle technologies. In electrorefining, spent nuclear fuel is treated electrochemically in order to effect separations between uranium, noble metals, and active metals, which include the transuranics. The accumulation of active metals in a lithium chloride-potassium chloride (LiCl-KCl) eutectic molten salt electrolyte occurs at the expense of the UCl3-oxidant concentration in the electrolyte, which must be periodically replenished. Our interests lie with the accumulation of active metals in the molten salt electrolyte. The real-time monitoring of actinide concentrations in the molten salt electrolyte is highly desirable for controlling electrochemical operations and assuring materials control and accountancy. However, real-time monitoring is not possible with current methods for sampling and chemical analysis. A new solid-state electrochemical sensor is being developed for real-time monitoring of actinide ion concentrations in a molten salt electrorefiner. The ultimate function of the sensor is to monitor plutonium concentrations during electrorefining operations, but in this work gadolinium was employed as a surrogate material for plutonium. In a parametric study, polycrystalline sodium beta double-prime alumina (Na-ß?-alumina) discs and tubes were subject to vapor-phase exchange with gadolinium ions (Gd3+) using a gadolinium chloride salt (GdCl3) as a precursor to produce gadolinium beta double-prime alumina (Gd-ß?-alumina) samples. Electrochemical impedance spectroscopy and microstructural analysis were performed on the ion-exchanged discs to determine the relationship between ion exchange and Gd3+ ion conductivity. The ion-exchanged tubes were configured as potentiometric sensors in order to monitor real-time Gd3+ ion concentrations in mixtures of gadolinium chloride (GdCl3) in LiCl-KCl eutectic molten salts through measurement of the potential difference between a reference and working electrode.

Subject

  • Keyword: Fuel Cycle
  • Keyword: Electrolytes
  • Keyword: Gadolinium Ions
  • Keyword: Actinide
  • Keyword: Multivalent
  • Keyword: Eutectics
  • STI Subject Categories: 98 Nuclear Disarmament, Safeguards, And Physical Protection
  • Keyword: Pyroprocessing
  • Keyword: Uranium Actinide
  • Keyword: Gadolinium Chlorides
  • Keyword: Spectroscopy
  • Keyword: Ion Exchange
  • Keyword: Plutonium
  • Keyword: Electrorefining
  • Keyword: Ceramic
  • Keyword: Actinides
  • Keyword: Sampling
  • STI Subject Categories: 11 Nuclear Fuel Cycle And Fuel Materials
  • Keyword: Nuclear Fuels
  • Keyword: Gadolinium
  • Keyword: Safeguards
  • Keyword: Chemical Analysis
  • Keyword: Chlorides
  • Keyword: Monitoring
  • Keyword: Sodium
  • Keyword: Molten Salts
  • Keyword: Lithium
  • Keyword: Sensor

Source

  • Conference: INMM 51st Annual Meeting,Baltimore, MD USA,07/11/2010,07/15/2010

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: INL/CON-10-17752
  • Grant Number: DE-AC07-05ID14517
  • Office of Scientific & Technical Information Report Number: 1000527
  • Archival Resource Key: ark:/67531/metadc830792
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