Effect of Damping Parameters on Seismic Analysis of Nuclear Reactor Coolant Loop

The Rayleigh damping parameters and its effect on the seismic analysis for the nuclear power plant reactor coolant loop are studied in this paper. Using the same model and other input parameters, three groups of Rayleigh damping parameters are used to calculate the seismic response of the reactor coolant loop. Typical support loads in the results are selected and analyzed. With the increasing of the natural frequency and effective mass of high frequency of the reactor coolant loop model, greater value of damping parameter has great effect on the calculation results.