EDN: EMDOFR
Authors & Affiliations
Zagorulko Yu.I., Ganichev N.S., Ilicheva N.S., Konovalov M.A., Chibisova A.S., Surin V.I.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Zagorulko Yu.I. – Leading Researcher, Cand. Sci. (Tech.). Contacts: 1, pl. Bondarenko, Obninsk, Kaluga region, Russia, 249033. Tel.: +7 (484) 399-70-00 (add. 80-84); e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Ganichev N.S. – Head of Laboratory.
Ilicheva N.S. – Leading Researcher, Cand. Sci. (Chem.).
Konovalov M.A. – Researcher.
Chibisova A.S. – Chemical Research Engineer.
Surin V.I. – Research Engineer.
Abstract
Simulation of carbon thermodynamic activity distribution FR’s sodium coolant indispensable for reliable prediction of carbon mass-transfer direction and intensity between reactors equipment structural materials, as well as for characterization of carbon activity control devices.
An equilibrium form of carbon occurs in sodium coolant in two-phase state: carbon soluted in sodium and particulate phase, while carbon terminal solubility in sodium even at sodium highest temperature in primary circuit is approximately one order of magnitude less as compared with carbon total content in the coolant. Phase transitions in carbon-sodium system (processes of carbon dissolution and crystallization) might be suspected as being responsible for carbon thermodynamic activity distribution in the primary circuit in dependence on hydrodynamic regimes of particles dissolution and their dwelling time in particular temperature zone of the circuit.
In the article are discussed characteristics of carbon particulate phase in sodium coolant flow and calculated estimation of the carbon particles dwelling time in the circuits simulated FR’s primary circuit. It is demonstrated that the effect of carbon particles dissolution in sodium coolant flow could be regarded as negligible. It is demonstrated experimentally that concentration of carbon, dissolved in sodium coolant, approximately corresponds to carbon saturation concentration at temperature of circuit low-temperature zone. At that, carbon activity distribution follows sodium circuit temperature distribution being unit value at law-temperature circuit zone.
Keywords
fast reactor, carbon-bearing impurities, carbon thermodynamic activity, carbon particulate phase, materials carburization, equilibrium tabs
Article Text (PDF, in Russian)
References
- Zagorulko Yu.I., Kozlov F.A., Vorobyova T.A. Issledovaniya temperaturnoy i kontsentratsionnoy zavisimosti termodinamicheskoy aktivnosti ugleroda v natrii [Studies of the temperature and concentration dependence of the thermodynamic activity of carbon in sodium]. Preprint FEI-2416 – Preprint IPPE-2146. Obninsk 1996. 24 p.
- Longson B., Thorley A.W. Solubility of carbon in sodium. J. appl. Chem., 1979, vol. 20, pp. 372–379.
- Zagorulko Yu.I., Kozlov F.A. The measurement of diffusive mobility of carbon in sodium. Proc. of the Third Int. Conf. Liquid Metal Engineering and Technology. Oxford, April 9–19, 1984. London: BNE, 1985. Vol. 2, p. 225.
- Zagorulko Yu.I., Vorobyova T.A. Fiziko-khimicheskie aspekty kontrolya termodinamicheskoy aktivnosti ugleroda v reaktorakh tipa BN [Physic-chemical aspects of monitoring the thermodynamic activity of carbon in FR’s reactors]. Materialy konferentsii “Teplofizicheskie eksperimental'nye i raschetno-teoreticheskie issledovaniya v obosnovanie kharakteristik i bezopasnosti yadernykh reaktorov” [Proc. of the Conference “Thermophysical experimental and theoretical calculations to substantiate the characteristics and safety of nuclear reactors”]. Obninsk, October 19–21, 2011. Vol. 2, pp. 313–321.
- Zagorulko Yu.I., Alekseev V.V. Povedenie vzvesey v natrii [Behavior of suspensions in sodium]. Obzor OB-109. Obninsk, IPPE, 1980. 86 p.
- Dutina D., Simpson J.L., Young R.C. Determination of impurities in a sodium system cold traps. Proc. of the Int. Conf. on Sodium Technology and Large Fast Reactors Design. Nov. 7–8, 1968. ANL-7520, Part I, p. 441.
- Aerov M.E., Todes O.M. Gidravlicheskie i teplovye osnovy raboty apparatov so statsionarnym i kipyashchim zernistym sloem [Hydraulic and thermal principles of operation of devices with stationary and boiling granular layer]. Leningrad, Khimiya Publ., 1968. 307 p.
- Zagorulko Yu.I., Ganichev N.S., Konovalov M.A. Issledovanie kinetiki rastvoreniya grafita v laminarnykh potokakh natriya [Study of dissolution kinetics graphite in laminar sodium flows]. Voprosy atomnoy nauki i tekhniki. Seriya: Yaderno-reaktornye konstanty – Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2018, issue 5, pp. 149–155.
- Gibillaro L.G. Residence time distributions in regions of continuous flow systems. Chem. Eng. Sci., 1979, vol. 34, no. 5, pp. 697–702.
- McCown J.J., Bagnall C. Carbon in sodium. A status review of the U.S.A. R and D work. Proc. of Specialists Meeting on Carbon in Sodium. Harwell, UK, November 27–30, 1997. IWGR/33. Summary Report. Vienna, IAEA Publ., 1980. Pp. 66–74.
- Zagorulko Yu.I., Koltukhovsky A.G., Kovalev Yu.P. Primenenie metoda ROS pri ekspluatatsionnom opredelenii termodinamicheskoy aktivnosti ugleroda v 1 konture reaktora BN-600 [Application of the equilibrium tabs method in the operational determination of the thermodynamic activity of carbon in the first circuit of the FR-600 reactor]. Konferentsya “Aktual'nye problemy atomnoy nauki i tekhniki. Opyt ekspluatatsii Beloyarskoy AES i perspektivy razvitiya atomnoy energetiki” [Proc. of the Conf. “Current problems of atomic science and technology. Operating experience of the Beloyarsk NPP and prospects for the development of nuclear energy”]. Zarechny, April 22–24, 1984, pp. 1–8.
- Kozlov E.A., Zagorulko Yu.I., Kovaliov Yu.P., Ullmann H., Rettig D. Die Bestimmung der thermody-namischen Kohlenstoffaktivitet in flussigen natrium mit einer Diffusionssonde mit Wustit-schicht und einer Festelekrolyt-Gasmesszelle. Kernenergie, 1984, Band 27, Heft 3, pp. 1–5.
- Tomilin I.A. Termodinamika rastvorov ugleroda i azota v splavakh zheleza. Dis. doct. khim. nauk [Thermodynamics of carbon and nitrogen solutions in iron alloys. Diss. doct. chem. sci.]. Moscow, 1975. 370 p.
UDC 621.039.534.63
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2026, no. 1, 1:18
