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For nuclear power plants fire events are of high safety significance since they have the potential to damage more than one redundant safety train simultaneously. Within the frame of the recently started second series of periodic safety reviews, a probabilistic fire risk assessment has to be performed in addition to the deterministic analysis. Therefore, realistic fire occurrence frequencies as well as appropriate validated fire models and simulation codes are needed. All these complex issues require internationally harmonized activities to gain consistent, reliable and traceable information as well as to reduce the costs. Presently, three international activities are ongoing: the OECD-FIRE project with the goal to establish a quality assured and consistent international fire event database, and two further activities. In the frame of one of these fire models and computer codes shall be evaluated and validated based on real scale experiments under as far as possible realistic boundary conditions in order to support their extended use for decision making. The other one aims on analyzing fire induced electric failures of safety related systems and components. The objectives of the international co-operations and the first results are presented.

Current international activities to increase fire protection knowledge for nuclear power plants