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2 Journal of Polish Safety and Reliability Association

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Risk analysis of external hydrological hazards with flooding potential for a German nuclear reference site

Röwekamp M., Gänssmantel G., Peschke J., Strack C., Utschick M.

Journal of Polish Safety and Reliability Association

2018

Vol. 9, No. 3

65--74

Probabilistic Safety Analyses (PSA) are a supplementary analytical tool used worldwide more and more in order to quantitatively assess the effect of hazards on the overall result regarding the safety of industrial installations, in particular nuclear power plants. In that way PSA provides a reliable basis for decisions on the necessity and the benefits of safety improvements. In the recent past, the existing methods and tools with respect to determining the site-specific risk of nuclear power plants have been comprehensively extended and further enhanced. The focus of extending the existing PSA methods was on external hydrological hazards with flooding potential. For systematically considering hydrological hazards within PSA a systematic approach has been developed. The paper demonstrates the extended approach in the example of a nuclear power plant site with different flooding risks.

Operating Experience with Hydrological External Hazards and Their Potential Safety Significance

Röwekamp M., Gänssmantel G., Strack C.

Journal of Polish Safety and Reliability Association

2017

Vol. 8, No. 1

111--117

The nuclear accidents of Fukushima in March 2011 have indicated the significance of external hazards for nuclear installations safety. One lesson learned from post-Fukushima investigations worldwide is that the operating experience from external hazards, even if these did not pose any significant harm to the affected plant, do represent important precursors, which should be taken into account in deterministic as well as probabilistic safety assessment. This paper provides an overview on the significance of events or event combinations involving hydrological external hazards. Some more recent examples of events from hydrological external hazards and their potential safety significance for nuclear power plants are discussed.