The level-1 results of 14 probabilistic safety assessments (PSA) for 8 pressurized water reactors (PWR) and 6 boiling water reactors (BWR) were evaluated with respect to accident initiators, reliability data, scope and extent of operator actions, plant hazard states, scope and extent of accident management (AM) measures, system and safety function unavailabilities, and core damage states. In general, the largest impacts on the results and on their uncertainties were observed for human errors, common cause failures and initiator frequencies for LOCAs.