Method implemented by the IRSN for the evaluation of uncertainties in level 2 PSA. Some examples
E. Raimond, N. Rahni, M. Villermain,
OECD/NEA/CSNI Workshop on evaluation of uncertainties in relation to severe accidents and level 2 PSA, Aix-en-Provence, 7-9 novembre 2005,
Rapport DSR 94
During the last few years, the IRSN has developed a level 2 PSA for French 900 MWe PWRs. The last version of the study has been completed in 2003. This version is going to be updated to take into account hydrogen recombiners installation and modifications envisaged for third decennial visit of these plants.
The objective of this paper is to comment the methodological approach of the IRSN for uncertainties assessment in level 2 PSA, with examples for accident progression event tree and releases assessment.