2016-2(19)

Operation of nuclear industry facilities

Article NameIdentification of Acoustic Standing Waves in the First Circuit PWER-440 in Startup Mode
AuthorsK.N. Proskuryakov* A.I. Fedorov**, M.V. Zaporozhets*, G.Y. Volkov*
Address

* National Research University «MPEI»,
Krasnokazarmennaya 14, Moscow, Russia 111250

** Novovoronezh NPP the branch of JSC Rosenergoatom Concern, Novovoronezh, Russia 396072
e-mail: ProskuriakovKN@mpei.ru

AbstractBACKGROUND An acoustic model of the coolant in primary circuit of Novovoronezh NPP PWER-440 unit №3 is worked out. The special program of measuring the pressure fluctuations at reactor start up is carried out. The methods of calculating the acoustic characteristics of the coolant in the primary circuit equipment are developed. RESULTS The results of calculation of acoustic standing waves for 18 start-up stages are presented. A comparison of calculation results of acoustic standing waves (ASW) frequencies with auto power spectrum density (APSD) signals from the pressure pulsation sensors has been done. The satisfactory agreements of results ASW calculation frequencies with measured data are obtained. Pressure compensator shows itself as Helmholtz resonator which resonance frequency depends on the level of the coolant.
Keywordsstanding waves, vibration, vibro-acoustic resonance, Helmholtz resonator
LanguageRussian
References

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