RBMK core model for computational tracking of 60Co production at the Leningradskaya nuclear power plant

Commercial production of 60 Co is being conducted at the Leningradskaya nuclear power plant by irradiating 59 Co in special facilities loading into an RBMK core (in all four units). The computational means used to determine the activity of cobalt in the irradiation setups and to decide when to extract them are described. The particularities of the computational model used for the core, which takes account of the reloading of the fuel assemblies and irradiation setups during fuel burnup, are described.