Abstract
AbstractThe first comprehensive study to determine the risk of LWRs by probabilistic methods was the US Reactor Safety Study WASH-1400 in 1975. Similar studies in other countries, e.g. Germany, followed. The methodology starts with the event tree analysis followed by the probabilistic analysis. This is continued by an analysis of the radioactivity release for the different accident sequences. Subsequently meteorological data and models for atmospheric diffusion and aerosol deposition are used to determine the radioactivity concentration and radiation dose to individuals in the areas around the plant. Countermeasures can be taken, e.g. evacuation or relocation, to lower the radioactive exposure of the population. Finally the results of event tree and fault tree analysis for different PWRs and BWRs (presently operating and more recent (future) designs) are presented. In addition, the results of reactor risk studies in the USA (WASH-1400) and in Germany are reported and discussed.KeywordsFailure ProbabilitySafety SystemSteam ExplosionReactor Pressure VesselRisk StudyThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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