New spectral methods of estimating dealy time in reactor noise investigations

Abstract

In experiments using neutron noise methods to estimate delay time in reactor noise investigations, the random processes of two detectors independent of the physical nature of the noise field under investigation are represented by an expression containing a local component, which conveys information on the delay, and a global component, which identically affects both detectors. In cases where the global component is dominant, the abscissa of the mutual correlation function global maximum is equal to zero, and the spectral density function is far from a linear relationship, which makes traditional methods unsuitable for obtaining the delay time. In this paper, two methods are proposed for excluding the global component from the determination in the event of the unfavorable relationship between the components.