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Hortal J.,CSN Nuclear Safety Council | Izquierdo J.M.,CSN Nuclear Safety Council | Queral C.,Technical University of Madrid | Ibanez L.,Technical University of Madrid
10th International Conference on Probabilistic Safety Assessment and Management 2010, PSAM 2010 | Year: 2010

Exceedance frequencies of selected safety limits are used in the SMAP methodology as suitable risk indicators for the assessment of safety margins. Calculation of exceedance frequencies as proposed by SMAP is based on the consideration of the accident sequences composing the so called Risk Space, an extension of the classical PSA event trees. The contribution of each sequence to the exceedance frequency of a specified limit results from an uncertainty analysis, usually supported by the use of best estimate plant simulation codes. The Damage Domain approach is presented as an adequate method to perform the uncertainty analysis, especially suited for those sequences where some events occur at uncertain times. This approach has been proposed by CSN in the context of the application exercise SM2A and has been used to develop the analysis of selected scenarios of loss of Component Cooling and/or Service Water as a contribution of CSN to SM2A. Source

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