Spectral methods for delay time estimation in reactor noise studies

In reactor-noise studies when determining various fields (neutron, temperature, acoustic) sometimes it is necessary to evaluate the delay of one random process towards another. Spectral transformations used for isolation of the information on delay when calculating coolant flow rate using different physical fields are considered. From the unified viewpoint the principles of developing the optimal and suboptimal spectral methods from which conventional method of mutual correlation function follows are given. 17 refs.; 2 figs