Generation of Microscopic Pseudo Fission-Products Properties

Abstract

Most cell burnup calculations are performed using a microscopic cross section library which contains a rather large number of fission-products, the behavior of these fission-products being dictated by an isotopic depletion chain. Here we will describe a method that can be used to simplify this isotopic depletion chain by lumping fission-products into pseudo-isotopes. We will also discuss how to associate decay rates, production yields and time dependent microscopic cross sections with these pseudo-isotopes.