EDN: PNNJUZ
Authors & Affiliations
Mitrofanova O.V., Starovoitov N.A., Pozdeeva I.G.
National Research Nuclear University “MEPhI”, Moscow, Russia
Mitrofanova O.V. – Professor, Dr. Sci. (Tech.).
Starovoitov N.A. – PhD student. Contacts: 31, Kashirskoe sh., Moscow, Russia, 115409. Tel.: +7 (915) 149-42-06; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Pozdeeva I.G. – Associate Prof., Cand. Sci. (Tech.).
Abstract
Experimental studies have been conducted to substantiate a new diagnostic method being developed to prevent the development of vibroresonance phenomena in the dynamic operating modes of marine nuclear power installations. The study of the influence of the features of complex vortex flows on the development of dangerous resonance effects was carried out on the model of an impact swirl flow characteristic of elements of complex nuclear power installations systems. It is established that in the transient modes of operation of nuclear power installations, depending on the pressure drop, three flow modes can be distinguished: subcritical, critical and subcritical. It has been experimentally proved that the realization of swirl flow crisis conditions leads at the initial stage to the formation of an internal spiral-vortex flow structure and energy accumulation, and then to the excitation of natural vibrations of the hydromechanical system. The phenomenon of hysteresis was found, which is expressed in the discrepancy between the dependence of hydraulic losses on the flow rate during an increase and decrease in pressure drop. It is shown that when the flow reaches a supercritical mode, it leads to the excitation of high-intensity acoustic vibrations and the development of vibrational processes. The research results allow us to propose a new method of vibroacoustic control based on online recording of acoustic vibrations in subsonic mode at the initial stage of the development of the flow crisis.
Keywords
nuclear power installations, hydrodynamics, vortex formations, dissipative structures, swirl flow crisis, experimental studies, acoustic oscillations, resonance, hysteresis, diagnostic method
Article Text (PDF, in Russian)
References
- Gadzhiev K.G., Verkhovsky A.E., Urtenov D.S., Gadzhiev D.K. Izuchenie prichin razrusheniya trubok parogeneratorov, vypolnennykh iz titanovykh splavov [Study of the causes of destruction of titanium alloy steam generator tubes]. Mezhdunarodnyy nauchno-issledovatel'skiy zhurnal – International Research Journal, 2020, no. 11–1 (101), pp. 85–91. DOI: https://doi.org/10.23670/IRJ.2020.101.11.013.
- Mitrofanova O.V., Ivlev O.A., Fedorinov A.V. Vliyaniye effektov vikhreobrazovaniya na rabotosposobnost' trubnykh sistem parogeneratorov sudovykh yadernykh energeticheskikh ustanovok [The effect of vortex formation on the operability of pipe systems of steam generators of marine nuclear power installations]. Morskiye intellektual'nyye tekhnologii – Marine intellectual technologies, 2023, no. 4 part 1, pp. 95–102. DOI: 10.37220/MIT.2023.62.4.012.
- Operating experience with nuclear power stations in member states (2021 edition). Produced by the IAEA in Austria July 2021. 1619 p.
- Operating experience with nuclear power stations in member states (2022 edition). Produced by the IAEA in Austria June 2022. 1624 p.
- Operating experience with nuclear power stations in member states (2023 edition). Produced by the IAEA in Austria August 2023. 1526 p.
- Operating experience with nuclear power stations in member states (2024 edition). Produced by the IAEA in Austria August 2024. 1518 p.
- Mitrofanova O.V., Bayramukov A.S., Ivlev O.A., Urtenov D.S., Fedorinov A.V. Issledovaniye vliyaniya vikhrevykh potokov na elementy YAEU [Research of the vortex flows influence on the NPP elements]. Voprosy atomnoy nauki i tekhniki. Seriya: Yaderno-reaktornyye konstanty – Problems of Atomic Science and Technology Series: Nuclear and Reactor Constants, 2021, no. 4, pp. 72–81.
- Mitrofanova O.V., Fedorinov A.V. Modelirovaniye gidrodinamiki i teploobmena v kanalakh parogeneriruyushchikh sistem sudovykh yadernykh energeticheskikh ustanovok integral'nogo tipa [Modeling of hydro dynamics and heat transfer in channels of steam generating systems of ship nuclear power installations of an integral type]. Teplofizika vysokih temperature – High Temperature, 2023. vol. 61, no. 4, pp. 625–631. DOI: 10.31857/S0040364423040117.
- Mitrofanova O.V., Ivlev O.A. Aktual'nyye teplofizicheskiye issledovaniya v tselyakh sovershenstvovaniya sudovykh yadernykh energeticheskikh ustanovok [Current thermophysical research in order to improve shipboard nuclear power in stallations]. Morskiye intellektual'nyye tekhnologii – Marine intellectual technologies, 2023, no. 4, part 1, pp. 85–94. DOI: 10.37220/MIT.2023.62.4.011.
- Arkadov G.V., Pavlenko V.I., Slepov M.T. Vibroakustika v prilozheniyakh k reaktornoy ustanovke VVER-1200[Vibroacoustics in applications to the WWER-1200 reactor]. Moscow, Nauka Publ., 2018. 469 p.
- Proskuryakov K.N. The digital acoustic model of a pres surized water reactor. Therm. Eng., 2021, vol. 68, no. 9. pp. 673–678. DOI: 10.1134/S0040601521090068.
- Proskuryakov K.N., Anikeev A.V., Afshar E. Verification of a Reactor’s Digital Acoustic Model in the Startup and Nominal Operation Modes of NPPs Equipped with VVER Reactors. Therm. Eng., 2021, vol. 68, no. 11, pp. 834–840. DOI: https://doi.org/10.1134/S0040601521100049.
- Mitrofanova O.V., Starovoitov N.A. Issledovaniye akusticheskikh i rezonansnykh yavleniy v paroproizvodyashchikh sistemakh sudovykh YAEU [Study of acoustic and resonant phenomena in steam-generating systems of marine nuclear power plant]. Teplovyye protsessy v tekhnike – Thermal Processes in Engineering, 2024, vol. 16, no. 7, pp. 334–343. Available at: https://tptmai.ru/publications.php?ID=182789 (accessed 07.08.2025).
- Mitrofanova O.V., Pozdeeva I.G., Starovoitov N.A. Eksperimental'nyye issledovaniya ustoychivoy formy vikhrevoy struktury zakruchennogo techeniya [Experimental investigations of the stable form of the vortex structure of a swirling flow]. Inzhenerno-fizicheskiy zhurnal – Engineering Physics Journal, 2025, vol. 98, no. 1, pp. 218–228.
- Pozdeeva I.G. Issledovanie gidrodinamiki i mekhanizmov generatsii akusticheskikh kolebanii v slozhnykh vikhrevykh techeniyakh. Dis. kand. tekh. nauk [Study of hydrodynamics and mechanisms of acoustic oscillation generation in complex vortex flows. Diss. cand. tech. sci.]. Moscow: NRNU MEPhI, 2019. 117 p.
- Mitrofanova O.V. On the Structural Similarity of Stable Forms of Spiral-Vortex Motion. J. Eng. Phys. Thermophy, 2017, vol. 90, no. 5, pp. 1119–1130. DOI: https://doi.org/10.1007/s10891-017-1666-y.
- Novikov I.I., Skobelkin V.I., Abramovich G.N., Klyachko L.A. Zakonomernost' raskhoda zhidkosti v zakruchennom potoke (effekt maksimal'nogo raskhoda zakruchennogo potoka zhidkosti) [Regularity of fluid flow rate in a swirling flow (the effect of the maximum flow rate of a swirling fluid flow)]. Discovery No. 389, 1990.
- Novikov I.I. Termodinamika spinodaley i fazovykh perekhodov [Thermodynamics of spinodals and phase transitions]. Moscow, Mashinostroenie Publ., 1984. 592 p.
UDC 532.5:534.6:621.039:629.561.5
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2025, no. 3, 3:15
