Open AccessComputer modeling of acoustic standing waves in the coolant of nuclear power plants
Author(s) -
K. N. Proskuryakov,
A. V. Anikeev,
E. Afshar
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1421/1/012041
Subject(s) - coolant , vibration , sound power , acoustics , mechanics , compressible flow , compressibility , flow (mathematics) , physics , engineering , mechanical engineering , sound (geography)
In nuclear power plants (NPPs), the dynamic interactions of the coolant with the structures are among the main factors determining the dynamic loads on the equipments, its service life and reliability. The most hazardous is the resonant interaction of vibrations of the equipment with acoustic standing waves (ASW) that arise in accidental conditions. It is pointed out that the study of accident conditions on a full-scale object model is not possible and, accordingly, the development of adequate computer models to simulate the conditions is of prime importance. The analysis of acoustic systems with single-phase and two-phase fluid media is based on the theory of elastic wave propagation in liquids and gases. The analysis is based on the equations of fluid state, equations of motion, continuity equation and the equation expressing the law of conservation of energy. It is shown that in view of the unity of the differential equations of acoustic and electrical systems, the study of the propagation of the volume flow rate of one-dimensional pulsating flow of a compressible single-phase or two-phase fluid in the acoustic system can be replaced by the study of the propagation of electric current in the lines of electrical circuits. The paper presents an acoustic scheme of the NPP coolant circuit formed by acoustic elements considering their inherent thermal-hydraulic and geometric parameters. It is shown that the results of calculations of the frequencies of the ASW are confirmed by the measurements carried out at the NPP.