Risk-based evaluation of the emergency power supply in nuclear power plants

摘要

At the example of the level 1+ probablistic safety analysis of a german boiling water reactor the loss of power supply event sequence is reagrded. The contribution of the event to the overall hazardous states is assessed. The weak points and the improvement potential of the emergency supply unit is investigated and discussed. Based on that the possible consequences for maintenance and the test strategy are demonstrated while keeping in mind, that the safety state of the plant must not be worsened.