Abstract
Abstract
Probabilistic Safety Assessments (PSAs) in Germany have primarily been conducted in the framework of Periodic Safety Reviews (PSRs). For some time, PSAs following the recommendations given by the reviewer with the final statement in the 1st PSR have been submitted and reviewed, like the probabilistic analyses of internal fires as well as Low Power and Shutdown States. From the very beginning, the review of the adequateness of the common cause failures (CCF) treatment represented a key element in the respective regulatory procedures – given the large impact on the results depending on the CCF assessment. In this paper, our experiences and insights from the reviewing procedures in the course of time are described – also addressing background and objectives as well as working programme and results with reference to reviewer's CCF projects. Finally, possible ways and procedures are presented related to a further development in CCF treatment in PSAs according to practical requests.