TY JOUR TI DEVELOPMENT OF MODELS, ALGORITHMS AND PROGRAM COMPLEX FOR SOLUTION OF PROBLEMS IN RISK ESTIMATE AT NUCLEAR POWER PLANTS AT BEYOND-DESIGN PLANT FAILURES KW probabilistic analysis of safety KW deterministic analysis of safety KW risk estimate KW NPP KW beyond-design failures KW neuron flow density KW emission of thermal neurons sources JO Bulletin of Bryansk state technical university AU Andreev, V.V. AU Berberova, M.A. AU Zolotarev, O.V. AU Chuenko, V.V. AU Karpushin, E.V. AU D'yachkov, D.V. AU Suvorov, A.V. PY 2020 IS 2020 PB Bryansk State Technical University