Development of Upgraded Full-Core 3D Diffusion Models for the Pickering Stations

Abstract

This paper describes a methodology used to model Pickering reactors with the Reactor Physics toolset currently in use at OPG stations, which includes the Reactor Physics Industry Standard Toolset (RFSP-IST/WIMS-IST/DRAGON-IST) and the fuel management code SORO.Detailed geometries were modeled in DRAGON-IST with devices and structures that extended into the reflector region and incremental properties were calculated for reactivity devices, guide tubes and structural materials based on the engineering drawings.