2019-4 (33)

Operation of nuclear industry facilities

Article Name10.26583/GNS-2019-04-07
Use CFD Model of WWER-1200 Reactor for Prediction of Fuel Assemblies Vibrations
AuthorsK.N. Proskuryakov1, A.V.Anikeev2, E. Afshar3, D.A. Pisareva4
Address

«National Research University «MPEI», Moscow, Russia

1ORCID ID: 0000-0002-1884-5576

 Wos Researher ID: I-3583-2017

e-mail: proskuriakovkn@mpei.ru

2ORCID ID:0000-0001-6463-2328X

e-mail: Anikeev@mephi.ru

3ORCID ID: 0000-0002-1884-5576

e-mail: afshari@mpei.ru

4ORCID ID:0000-0002-6261-6973

e-mail:pisarevavi@yandex.ru

AbstractThe pare shoes the development cartogram of changes the natural frequencies of coolant pressure oscillation (NFCPO) in the reactor core to predict the conditions of growth the vibrations of fuel assemblies (FA) for WWER-1200. Determination of the average temperature and pressure of the coolant in the core in the nominal mode is carried out by applying the known calculation results obtained using the thermo hydraulic three-dimensional CFD model of the WWER-1200 reactor. It is shown that the coincidence of the NFCPO with the frequency of vibrations of the FA is possible only at certain values of pressure and temperature of the coolant and vibration amplification occurs only in the temperature range corresponding to the bandwidth relative to the detected value of the NFCPO. It is shown that it is possible to increase flexural vibrations of FA-2M at different stages of reactor start-up.
Keywordsfrequency, oscillations, reactor start-up, pressure, coolant, vibrations, wear
LanguageRussian
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