Dynamic Response of the WWER 1000/320 Reactor on the Pressure Pulsations Generated by Main Circulation Pumps

Dynamic response of all PWR reactors is generated by the turbulent pressure pulsations (TPP) in the boundary layer on the surface of core barrel and acoustic pressure pulsations (APP) generated by main circulation pumps (MCP). While TPP have character of the white noise in the frequency range 〈0; 35〉 Hz, APP generate discrete set of frequencies called revolution and blade frequencies. The rotor revolutions of individual MCPs are slightly different and are changing as the operation conditions are changing. It results in the varying beat character of reactor vibrations. Results of numerical simulations and experimental measurements are presented.Copyright © 2009 by ASME