Neutronic characterization of GFR demonstrator unit

Abstract

The presented paper is related to introduction of the design and neutronic characterization of the start-up core developed for Gas-cooled Fast Reactor (GFR) demonstrator. The Slovak University of Technology in Bratislava joined the project ALLEGRO in last decade as part of the consortium of middle-European institutions. The reactor core is based on the standard and MOX pin type fuel from the first phase of the project. Neutronic characterization is aimed to determine the standard neutronic parameters using conventional computational systems. Results for the heterogeneous and homogenized designs of the fuel region are presented depending on computational code, crosssection library and energy structure.