Prof. Dr. Marko Čepin received his B.Sc., M.Sc. and Ph.D. degrees from the University of Ljubljana, Slovenia, in 1992, 1995 and 1999, respectively. He was employed at Jožef Stefan Institute in the years from 1992 to 2009. He was invited to Polytechnic University of Valencia in the year 2001. He is a president of Nuclear Society of Slovenia (2010-2014, 2014-2018). He is a professor at the Faculty of Electrical Engineering, University of Ljubljana since 2009. His research interests include energy engineering, power plants and reliability of power systems.Prof. Ing. Radim Briš, Ph.D. is research worker and university full professor in applied mathematics and technical cybernetics at the VŠB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Department of Applied Mathematics, senior researcher in applied statistics and operational research at the Centrum Excelence IT4Innovations, VŠB-Technical University of Ostrava, team leader for the Stochastic reliability modelling and risk management group. He currently works as Vice-President of European Safety and Reliability Association, and is member of ESRA Management Board. Previously he spent one year as invited research professor at the Université de Technologie de Troyes, Laboratoire de modélisation et de Sureté des Systemes, France. He also spent 5 years in the position of Vice-Dean of the Faculty of Electrical Engineering and Computer Science, VŠB TU Ostrava.