EDN: YDJRCU
Authors & Affiliations
Sadovnichiy R.P., Askhadullin R.Sh., Lotov V.S., Dvoretskiy S.V.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Sadovnichy R.P. – Senior Researcher, Thermophysicist. Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, 249033. Tel.: +7 (484) 399-70-00 (add. 42-77); e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Askhadullin R.Sh. – Head of Department, Cand. Sci. (Tech.), Associate Professor.
Lotov V.S. – Research Engineer.
Dvoretsky S.V. – Research Engineer.
Abstract
This article presents the results of the development of a reference calibration unit for measuring channels and sensors of thermodynamic oxygen activity in heavy liquid metal coolants. A method is considered for reproducing the thermodynamic activity of oxygen in the fuel cell using calibration gas mixtures. This method is based on the reaction of hydrogen gas with oxygen dissolved in a coolant, during which water vapor is formed and the level of oxygen activity in the fuel cell changes. It is proposed to supply a moistened hydrogen vapor gas mixture to the reaction chamber, where the thermodynamic activity level will be adjusted depending on the ratio of the volume concentrations of water vapor and hydrogen. The results of experiments on regulating the level of thermodynamic activity oxygen in a calibration unit by the calibration gas mixtures method are presented, and it is shown that measurements carried out using sensors of thermodynamic oxygen activity have a high convergence with the level of thermodynamic activity reproduced in the reaction chamber. The use of the developed reference calibration unit makes it possible to increase the accuracy of reproducing the thermodynamic activity of the medium compared to the previously used method of reproducing media with a known oxygen content using chemical reagents and makes it possible to establish any level of oxygen thermodynamic activity in the range from 1 to 10–6.
Keywords
oxygen activity sensors, reference electrode, heavy liquid metal coolants, lead melt, thermodynamic activity of oxygen, steam-chloride gas mixtures, equilibrium level, reaction capacity, partial pressure, verification
Article Text (PDF, in Russian)
References
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UDC 621.039.534.6
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2025, no. 4, 4:18
