| Popis: |
The paper is concerned with the stability criterion in the point reactor kinetics model when it is excited by Gaussian reactivity white noise in the presence of delayed neutrons. This criterion has been established by Behringer (Ann. Nucl. Energy18, 397, 1991) where the Wiener-Hermite Functional method, and in particular with respect to the stability problem, the Fokker-Planck method, have been applied. The stability parameter introduced there has appeared in two mathematically different forms. The present work shows numerically, by a six-group treatment of the delayed neutrons, that these two forms are equivalent. The one-group form of the stability parameter, when the delayed neutron data are a priori condensed into one group, exhibits a very good approximation in comparison with the exact results. |
