Pseudo-Isotopes Generation for the 235U and 238U Depletion Chains

Abstract

We will discuss in details the method used to generate the properties of the pseudo-isotopes for the 235U and 238U depletion chains. Using physical considerations, we derive a simple relation for the time and space dependence of the cross section, decay constant and fission yields for the pseudo-isotopes. The effect of the creation of these pseudo-isotopes and of the elimination of 243Am, 242Am, 241Am and 237Np on the critically of a thermal power reactor are also investigated.