Mišániková Martina, diploma thesis at the Technical University in Zvolen, Faculty of Wood Sciences and Technology, Fire Protection and Safety. Diploma thesis, Risk assessment with the operation of the selected category B enterprise; thesis supervisor doc. Ing. Andrea Majlingová, PhD., Zvolen 2019, 67 p.This thesis is focused on explanation of issues in the area of major industrial accidents prevention, specific analyzes in risk assessment and risk assessment in category A and B. In a diploma thesis on a particular category B enterprise, we will assess the risks associated with its operation and, based on the model situation in ALOHA and TEREX and qualitative methods, compare the results and assess the risks.