On Electrode Polarization of Electrochemical Oxygen Sensor in Liquid Metal Coolants

UDC: 
621.039.564

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The paper considers the main provisions of thermodynamic oxygen activity control in liquid metal coolants by the EMF method by means of a two-electrode electrochemical oxygen sensor with a solid oxygenated electrolyte which is in contact with the coolant and at the same time is a working electrode of the sensor. The sensor EMF is proportional to the oxygen activity logarithm. It has been noted that absorption of metallic impurities and oxides on the electrolyte causes polarization of the working electrode, thus reducing the EMF value and deteriorating the oxygen control accuracy. The polarization process was shown to be multifactorial and localized within the limits of double electric layer that results from the difference in the work functions of the contacting phases. The double layer characteristics are presented. The analytical dependence values were calculated for the electron work function from the solid electrolytes and metal oxides.

References: 
1. Efanov A.D., Kozlov F.A. Ot vybora teplonositelei dlya YaEU k atomnoi energetike KhKhI veka. Izvestiya vuzov. Yadernaya energetika, 2001, no. 2, pp. 99-102.
2. Orlov V.V., Leonov V.N.,Filin A.I. et al. Konstruktsiya reaktorov BREST elektricheskoi moshchnost'yu 300 i 1200 MVt. Sb. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh». Obninsk, GNTs RF-FEI, 1999, vol. 2, pp. 503-510.
3. Dragunov Yu.G., Stepanov V.S.,ZrodnikovA.V. et al. Reaktornyi modul' SVBR-75/100: povyshennaya bezopasnost', transportabel'nost', vozmozhnost' mnogotselevogo primeneniya. Tez. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh». Obninsk, GNTs RF-FEI, 2003, p. 16.
4. Gromov B.F., Orlov Yu.I., Martynov P.N. et al. Problemy tekhnologii tyazhelykh zhidkometallicheskikh teplonositelei (svinets-vismut, svinets). Sb. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh». Obninsk, GNTs RF-FEI, 1999, vol.1, pp. 92-106.
5. Oshkanov N.N., Saraev O.M., Bakanov M.V. et al. 30- letnii opyt ekspluatatsii natrievogo bystrogo reaktora BN-600. Atomnaya energiya, 2010, vol. 108, no. 4, pp. 186-191.
6. Shmatko B.A., Shimkevich A.L. Diagnostika korrozii i kontrol' tekhnologicheskikh protsessov metodami aktivometrii v teplonositele svinets-vismut. Sb. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekh nologiyakh». Obninsk, GNTs RF-FEI, 1999, vol. 2, pp. 741-746.
7. Martynov P.N., Orlov Yu.I. Protsessy shlakoobrazovaniya v svintsovo-vismutovom konture. Preduprezhdenie i likvidatsiya kriticheskikh situatsii. Sb. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh». Obninsk, GNTs RF-FEI, 1999, vol. 2, pp. 608-619.
8. Blokhin V.A., Shimkevich A.L., Musikhin Yu.A. et al. Opyt sozdaniya i ekspluatatsii tverdoelektrolitnykh aktivometrov kisloroda v teplonositele svinets-vismut. Sb. dokl. konf. «Tyazhelye zhidkometallicheskie teplonositeli v yadernykh tekhnologiyakh». Obninsk, GNTs RF-FEI, 1999, vol. 2, pp. 631-635.
9. Martynov P.N., Chernov M.E., Gulevskii V.A. et al. Razrabotka elektrokhimicheskogo datchika kapsul'nogo tipa dlya kontrolya kisloroda v tyazhelom teplonositele. Atomnaya energiya, 2005, vol. 98, no. 5, p. 360.
10. Kozlov F.A., Kuznetsov E.K., Vorob'eva T.A.et al. Elektrokhimicheskaya yacheika dlya izmereniya aktivnosti kisloroda v zhidkom natrii. Atomnaya energiya, 1981, vol. 51, no. 2, pp. 99-101.
11. Kofstad P.K. Nonstoichiometry, diffusion, and electrical conductivity in binary metal oxides. Wiley Interscience, New York-London-Sydney-Toronto,1972.
12. Hladik J. Physics of Electrolytes, London, Academic Press, 1972.
13. Toropov Yu.S. Issledovanie protsessov polucheniya i svoistv tverdykh elektrolitov na osnove ZrO 2. Avtoreferat diss. kand. tech. nauk. Sverdlovsk, 1975.
14. Strelov K.K. Teoreticheskie osnovy tekhnologii ogneupornykh materialov: Uchebnoe posobie dlya vuzov. Moscow, Metallurgiya, 1985, 480 p.
15. Devyatkov N. D., Lyubimov M.L., Rubashev M.A., Berdov G.I., Gavrilov V.N. et al. Termostoikie dielektriki. Moscow, Atomizdat, 1980, 246 p.
16. Iofis N.A., Musikhin Yu.A., Shimkevich A.L. et al. Elektricheskie svoistva fianitov v oblasti 430 – 750 K. Neorganicheskie materialy, 1985, vol. 21, no. 2, p. 330.
17. Musikhin Yu.A., Blokhin V.A., Ievleva Zh.I. Elektricheskie svoistva fianitov v oblasti 300–700 K / Tez. dokl. Mezhotraslevoi konferentsii «Teplofizika-91» (November 12-15, 1991), Sb. tez. dokl. «Ispol'zovanie zhidkikh metallov v narodnom khozyaictve». Obninsk, GNTs RF-FEI, 1993, pp. 121-122.
18. Damaskin B.B., Petrii O.A. Osnovy teoreticheskoi elektrokhimii: Uchebnoe posobie dlya vuzov. Moscow, Vysshaya shkola, 1978, 240 p.
19. Frumkin A.N., Bagotskii V.S., Iofa Z.A.et al. Kinetika elektrodnykh protsescov: Uchebnoe posobie dlya universitetov. Moscow, Moskovskii universitet, 1952, 315 p.
20. Stromberg A.G., Semchenko D.P. Fizicheskaya khimiya: Uchebnik dlya vuzov. 2-e izd., pererab. i dop. Moscow, Vysshaya shkola, 1988, 496 p.
21. Delakhei P. Dvoinoi sloi i kinetika elektrodnykh protsessov/Per. s angl. pod red. A.N. Frumkina. Moscow, Mir, 1967, 352 p.
22. Fridrikhov S.A., Movnin S.M. Fizicheskie osnovy elektronnoi tekhniki: Uchebnik dlya vuzov. Moscow, Vysshaya shkola, 1982, 608 p.
23. Krylov O.V., Kiselev V.F. Adsorbtsiya i kataliz na perekhodnykh metallakh i ikh oksidakh. Moscow, Khimiya, 1981, 288 p.
24. Samsonova G.V. et al. Fiziko-khimicheskie svoistva okislov: Spravochnik. Moscow, Metallurgiya, 1978, 472 p.
25. Shalimova K.V. Fizika poluprovodnikov: Uchebnik dlya vuzov. 3-e izd., pererab. i dop. Moscow, Energoatomizdat, 1985, 392 p.
26. Gorbachev V.V., Spitsyna L.G. Fizika poluprovodnikov i metallov: Uchebnik dlya vuzov. 2-e izd. pererab. i dop. Moscow, Metallurgiya, 1982, 435 p.
27. Samsonova G.V., Fomenko V.S., Podchernyaeva I.A. Emissionnye i adsorbtsionnye svoistva veshchestv i materialov: Spravochnik, Moscow, Atomizdat, 1975, 320 p.
28. Plambeck, J. A. Electroanalytical Chemistry: Basic Principles and Applications, John Wiley & Sons, New York, 1982.

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