Reliability data collection for fire protection features

In order to perform probabilistic fire safety analyses, a comprehensive data base is needed including physical characteristics of fire compartments and their inventory, fire occurrence frequencies, technical reliability data for all fire-related equipment, human actions and human error probabilities, etc. For German nuclear power plants, the operational behaviour of different fire protection features has been analysed in order to provide updated reliability data, mainly for technical reliability of active fire protection features. These analyses are based on the examination of reported results of the regular inspection and maintenance programs for nuclear power plants as well as on further observations during the plant operation. Last not least the raw data have to be assessed and statistically treated to be processed for application in a database.