neutron diffusion codeCode System GEFEST-M 9/10/2025 2025 - #03 Modelling processes at nuclear facilities Boldyrev A.M. Seleznev E.F. Lyapin E.P. Tuchkov A.M. Stolyarov S.G. Gaitanov Y.S. Chernyshov I.Y. Peregudov A.A. Semenov M.Y. Tormyshev I.V. Averchenkova E.P. Mishin V.A. Panova D.V. Losev V.V.