The developed tool is fully MatLab based and requires a set of input data from a commercial static core simulator. The driving perturbation can be specified both as a perturbation in thermo-hydraulic parameters or directly as a perturbation in macroscopic cross-sections. As output, the 3-dimensional spatial distribution of the noise in coolant density, pressure, enthalpy, inlet velocity, fuel temperature and neutron flux is obtained.
In this work, some results of the noise simulations, performed for the case of a homogeneous perturbation in inlet velocity for a commercial reactor core are shown and discussed. All calculations are performed in 3D node-wise space and frequency domain.