The meeting was devoted to developing and applying PSA based methods for complementary assessment of NPPs’ robustness against the impact of extreme events. The problematic issues raised during the previous technical meeting in 2014 were thoroughly discussed. Mainly following type of issues were covered: uncertainty in the phenomena of severe accidents and hazards, combination of extreme hazards, multi-unit effects, screening methodology and others. For each of the issue the status and problematic aspects were discussed. During the discussions the experience and knowledge of experts as well as materials of 2014 technical meeting have been used. As a result of the meeting a list of recommendations with possible problem solutions and/or request for additional investigations was developed for IAEA. The draft report developed during the meeting was presented to IAEA nuclear safety assessment section and NSAT (nuclear safety action team) representatives. During the closing briefing it was decided to present developed report for international community review and later develop it up to the level of IAEA publication (TECDOC or Safety Report).
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