Abstract
Abstract The relaxation effects associated with the spontaneous fluctuations in the neutron population and in the photon emission in nuclear reactors are studied, based on a space-independent two-energy-group reactor and detector model. The approach is based on the forward Kolmogorov equation and is carried out in a consistent and unified way. The influence of a large number of reactor and detector characteristics on the variance of the cumulative number of signal units, on correlation functions and on power spectra is explicitly given. The influence of gamma radiation on noise measurements with gamma compensated ionization chambers is considered. Other detector types are obtained as special cases of the compensated ionization chamber. Detection of photons, fast neutrons and thermal neutrons is included in the treatment, as are absorption, recoil and fission type detectors. From the results obtained it is suggested that instead of and in addition to the fast neutron detectors previously proposed the more easily realizable photon detectors should be utilized to extract information on the fast group of neutrons in nuclear reactor systems. The utilization of noise measurement techniques for relaxation measurements in non-multiplying media is also suggested.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call