Lazarenko Alexander P. Head of the Software Development Department NRC «Kurchatov Institute» Lazarenko_AP@nrcki.ruConstant Support for Calculations of Thermal Neutron Reactors of the VVER Type 3/27/2026 2026 - #01 Current issues in nuclear energy Kalugin M.A. Lazarenko A.P. Lizorkin M.P. Semchenkov Yu.M. Shkarovsky D.A.