The WIMS-E module W-SPECTROX

W-SPECTROX is a new module in the WIMS-E reactor physics calculational scheme. Its function is to calculate collision probabilities for an approximate model of a fuel cluster, consisting of an average fuel pin, clad and coolant, surrounded by a bulk moderator. Its application is therefore aimed primarily at AGR (or similar) assembly calculations. Within WIMS-E, the smearing module W-SMEAR is used to generate the simple model that is input to W-SPECTROX and in general, the flux solution module W-PIP is then used to generate fluxes typical of the flux, can, coolant and moderator regions of the problem. These fluxes are used to condense the energy group structure of the problem and/or to perform a spatial smearing of the rings of fuel pins. By choosing an appropriate condensation and smearing, computing times can be much reduced in a subsequent more detailed spatial solution of the problem. This report describes where the new module fits into WIMS-E and how to use it. (author)