Lanthanum Trifluoride as a Membrane in a Reference Electrode for Use in Certain Molten Fluorides

Bronstein, H. R.; Manning, D.L.

doi:10.1149/1.2404146

Cited by 43 publications

(30 citation statements)

References 13 publications

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“…RE design and materials.-The design of the thermodynamic RE studied in this work uses the LaF 3 ionic membrane introduced by 7 Some simplifications in this design were made, following a similar design to the one reported by Straka.…”

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confidence: 99%

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)

Carotti

Scarlat

2017

J. Electrochem. Soc.

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2LiF-BeF2 (FLiBe) is proposed as coolant for advanced nuclear fission and fusion reactors designs. Electrochemical techniques can be used to answer important research questions about the chemistry, mass transport, and corrosion behavior of FLiBe. The use of electrochemical techniques is predicated upon a thermodynamic reference electrode (RE) for FLiBe. This paper reports the design and characterization of a RE for FLiBe based on the Ni/Ni(II) redox couple, a boron nitride body, and a LaF3 ionic membrane. This electrode, tested in the range of 500°C–600°C shows stability of +/−1 mV for ten hours, good polarizability behavior, and Nernstian behavior. This data is comparable to other RE data reported for other fluoride salt mixtures. This paper also shows that beyond ten hours the RE potential drifts and there is evidence of Ni(II) depletion from the RE. We discuss some of the mechanisms that may cause this drift.

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confidence: 99%

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)

Carotti

Scarlat

2017

J. Electrochem. Soc.

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“…They take advantage of Nernstian behavior of Ni/Ni 2+ red-ox couple [7] and were developed to provide reproducible electrochemical measurements in molten fluoride salt medium. The particular design is similar to the reference electrode reported by H. R. Bronstein et al [8], but the construction was significantly simplified. The RE´s main body is produced from pyrolitic boron nitride, grade HIP, filled with mixture of NiF 2 (1.0 molar solution) with the same carrier melt as the measured one and nickel wire is tightly held by a holder, passed through a nut (both are made from pure nickel metal as well) and immersed into the melt.…”

Section: Reference Electrodementioning

confidence: 76%

Development of Pyrochemical Reprocessing of the Spent Nuclear Fuel and Prospects of Closed Fuel Cycle

Tulackova¹,

Chuchvalcova-Bimova²,

Precek³

et al. 2012

Atom Indo.

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DEVELOPMENT OF PYROCHEMICAL REPROCESSING OF THE SPENT NUCLEAR FUEL AND PROSPECTS OF CLOSED FUEL CYCLE.Molten-Salt Reactor (MSR) is a design of an advanced reactor system from the GEN IV family working in thermal or epithermal neutron spectrum and using thorium or transuranium fuel in the form of molten fluorides. It is based on the experience with the development of the molten-salt reactor technology in the Oak-Ridge National Laboratory in the United States. The MSR fuel cycle with integrated reprocessing represents one of the potential ways both for significant decrease of total amount of radioactive wastes for final deposition and for utilization of nuclear energy for electricity and heat production as effectively as possible. There are two pyrochemical reprocessing techniques studied in NRI Rez plc which are considered to be applied both for reprocessing of already existing spent fuel and for preparation and "on-line" reprocessing of MSR fuel: (i) the Fluoride Volatility Method (FVM), which performs chemical conversion of spent thermal oxide fuel components into fluorides and their consequent separation by means of their different volatility, thermal stability and chemical affinity to various sorbents; and (ii) electrochemical separation of the actinides (Ans) and fission products (FP), represented mainly by lanthanides (Lns), from each other by electrolytic deposition method on solid cathode in molten fluoride media.

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“…The container material should also be resistant to the fluoride salt mixture to prevent contamination. There have been several reports showing the development of various reference electrodes during the MSRE project (Bronstein andManning 1972, Bamberger 1975a). The development can be traced though the following basic designs:…”

Section: Reference Electrodes For Electrochemical Analysismentioning

confidence: 99%

Conceptual Design of Forced Convection Molten Salt Heat Transfer Testing Loop

Sohal¹,

Sabharwall²,

Calderoni³

et al. 2010

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This report develops a proposal to design and construct a forced convection test loop. A detailed test plan will then be conducted to obtain data on heat transfer, thermodynamic, and corrosion characteristics of the molten salts and fluid-solid interaction. In particular, this report outlines an experimental research and development test plan. The most important initial requirement for heat transfer test of molten salt systems is the establishment of reference coolant materials to use in the experiments. An earlier report produced within the same project highlighted how thermophysical properties of the materials that directly impact the heat transfer behavior are strongly correlated to the composition and impurities concentration of the melt. It is therefore essential to establish laboratory techniques that can measure the melt composition, and to develop purification methods that would allow the production of large quantities of coolant with the desired purity. A companion report describes the options available to reach such objectives. In particular, that report outlines an experimental research and development test plan that would include following steps:• Molten salts: The candidate molten salts for investigation will be selected.• Materials of construction: Materials of construction for the test loop, heat exchangers, and fluid-solid corrosion tests in the test loop will also be selected.• Scaling analysis: Scaling analysis to design the test loop will be performed.• Test plan: A comprehensive test plan to include all the tests that are being planned in the short and long term time frame will be developed.• Design the test loop: The forced convection test loop will be designed including extensive mechanical design, instrument selection, data acquisition system, safety requirements, and related precautionary measures.• Fabricate the test loop.

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Lanthanum Trifluoride as a Membrane in a Reference Electrode for Use in Certain Molten Fluorides

Cited by 43 publications

References 13 publications

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)

Development of Pyrochemical Reprocessing of the Spent Nuclear Fuel and Prospects of Closed Fuel Cycle

Conceptual Design of Forced Convection Molten Salt Heat Transfer Testing Loop

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Lanthanum Trifluoride as a Membrane in a Reference Electrode for Use in Certain Molten Fluorides

Cited by 43 publications

References 13 publications

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF2(FLiBe)

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF2(FLiBe)

Development of Pyrochemical Reprocessing of the Spent Nuclear Fuel and Prospects of Closed Fuel Cycle

Conceptual Design of Forced Convection Molten Salt Heat Transfer Testing Loop

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Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)

Characterization of a Thermodynamic Reference Electrode for Molten LiF-BeF₂(FLiBe)