Nuclear Technology · 1978 · 20 citations · 1 references
Natural SciencesChemical EngineeringChemistryAnalytical ChemistryElectrochemistryInstrumentationElectroanalytical ChemistryElectrochemical CellsElectrochemical DetectionElectrochemical SensorsElectrode MaterialsReference ElectrodesElectrochemical Gas SensorsElectrochemical MeasurementsFlange TechnologyOxygen SensingOxygen SensorsReference Electrode ConstructionReference Electrode DesignReference Electrode Materials
The results obtained from ~4000 h of operation of an electrochemical oxygen meter developed at General Electric Company for measuring oxygen activities in liquid sodium are described. In the present design, a small ceramic cup (ThO2 with 7 to 8 wt% Y2O3) has been brazed to a metal tube that is inserted into the liquid sodium via a standard sodium flange. The reference electrode used in the present deisgn consists of In/In2O3. Several meters were tested in a flowing sodium system, where the oxygen concentrations were controlled by a cold trap. At 500°C, the oxygen electromotive force (emf) output can be expressed aswhere T is the cold-trap temperature in K. The temperature coefficient of the meters can be expressed as
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Calibration Stability of Oxygen Meters for LMFBR Sodium Systems
J.M. McKee, D.R. Vissers, P.A. Nelson et al. · Nuclear Technology · 1974 · 22 citations