Performance of solid electrolyte oxygen sensor with solid and liquid reference electrode for liquid metal

Adhi, Pribadi Mumpuni; Kondo, Masatoshi; Takahashi, Masayuki

doi:10.1016/j.snb.2016.10.003

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…Alternative options for reference electrodes are: Air/metal (Pt) [ 43 , 44 ] or perovskite oxide e.g., Lanthanum Strontium Manganite (LSM) and Lanthanum Strontium Manganite-Gadolinium Doped Ceria (LSM-GDC) [ 45 , 46 ]; Solid metal/metal oxide mixtures e.g., Fe/Fe 3 O 4 [ 47 , 48 , 49 , 50 ], Cu/Cu 2 O [ 51 ]. …”

Section: Discussionmentioning

confidence: 99%

Electrochemical Sensors for Controlling Oxygen Content and Corrosion Processes in Lead-Bismuth Eutectic Coolant—State of the Art

Orlov

Bogachev

Mereshchenko

et al. 2023

Sensors

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Controlling oxygen content in the primary circuit of nuclear reactors is one of the key tasks needed to ensure the safe operation of nuclear power plants where lead-bismuth eutectic alloy (LBE) is used as a coolant. If the oxygen concentration is low, active corrosion of structural materials takes place; upon increase in oxygen content, slag accumulates due to the formation of lead oxide. The generally accepted method of measuring the oxygen content in LBE is currently potentiometry. The sensors for measuring oxygen activity (electrochemical oxygen sensors) are galvanic cells with two electrodes (lead-bismuth coolant serves as working electrode) separated by a solid electrolyte. Control of corrosion and slag accumulation processes in circuits exploring LBE as a coolant is also based on data obtained by electrochemical oxygen sensors. The disadvantages of this approach are the low efficiency and low sensitivity of control. The alternative, Impedance Spectroscopy (EIS) Sensors, are proposed for Real-Time Corrosion Monitoring in LBE system. Currently their applicability in static LBE at temperatures up to 600 °C is shown.

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Section: Discussionmentioning

confidence: 99%

Electrochemical Sensors for Controlling Oxygen Content and Corrosion Processes in Lead-Bismuth Eutectic Coolant—State of the Art

Orlov

Bogachev

Mereshchenko

et al. 2023

Sensors

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show abstract

“…Magnesia Stabilized Zirconia (MSZ) is used as a solid electrolyte material with Fe/Fe3O4 for reference electrodes. Details of how to make oxygen sensors have been described in the paper in the previous paper [11].…”

Section: Structure and Oxygen Sensor Working Principlementioning

confidence: 99%

“…The oxidation reaction of Fe in the Fe/Fe3O4 reference electrode in equilibrium state can be written as (s) 2(g) 3 4(s) (11) by using the Sieverts law the activity in Fe can be determined by Equation (7). Thus, the oxygen activity in the reference electrode can be calculated by equation…”

Section: Structure and Oxygen Sensor Working Principlementioning

confidence: 99%

“…A good reference electrode must have a small impedance so that the sensor has a fast response time [10]. Comparison of the performance of sensors using Fe/Fe3O4 and Bi/Bi2O3 as reference electrodes has been carried out in previous studies on static conditions [11,12]. The performance of the sensor using Fe/Fe3O4 shows the time to stabilize the sensor which is shorter than Bi/Bi2O3.…”

Section: Introduction mentioning

confidence: 99%

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Measurement of Oxygen Concentration in Static and Flowing Liquid Pb-Bi by Using Zirconia Based Sensor

Adhi

Kamal

Muslimin

et al. 2020

ijp

Self Cite

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Liquid Lead-Bismuth Eutectic (LBE) has been proposed as one of the coolant for the Generation IV nuclear reactor. However, the oxygen should be controlled adequately to suppress the corrosion rate of the LBE. A device called oxygen sensor made of zirconia as solid electrolyte has been used to monitor the oxygen concentration online in order to control the oxygen concentration. The principle of this sensor is based on electrochemistry method where the difference oxygen activitiy between reference electrode (RE) and working electrode (in liquid LBE) can make potential difference. The potential difference is measured by electrometer and can be converted into oxygen concentration based on Nernst equation. Iron (Fe)/Magnetite (Fe3O4) was used as material for RE in this study. Measurement of oxygen concentration was conducted at 450 - 600°C for the static condition of LBE and around 390°C for the dynamic condition of flowing LBE. The oxygen concentration for both two experiment conditions were set in oxygen saturated condition of Pb-Bi. The oxygen sensor based on zirconia solid electrolyte with Fe/Fe3O4 as RE can measured the oxygen concentration in liquid LBE. The results showed that the measurement was agreed with the Nernst equation theoretical calculation.

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Pumps and instruments for liquid metal coolant circuits

Gnanasekaran¹

2022

Science and Technology of Liquid Metal Coolants in Nuclear Engineering

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Performance of solid electrolyte oxygen sensor with solid and liquid reference electrode for liquid metal

Cited by 10 publications

References 22 publications

Electrochemical Sensors for Controlling Oxygen Content and Corrosion Processes in Lead-Bismuth Eutectic Coolant—State of the Art

Electrochemical Sensors for Controlling Oxygen Content and Corrosion Processes in Lead-Bismuth Eutectic Coolant—State of the Art

Measurement of Oxygen Concentration in Static and Flowing Liquid Pb-Bi by Using Zirconia Based Sensor

Pumps and instruments for liquid metal coolant circuits

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