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NKS Programme Area:
NKS-R
Research Area:
Organisation and safety culture
Report Number:
NORD 1990:57
Report Title:
Dependencies, human interactions and uncertainties in probabilistic safety assessment
Activity Acronym:
RAS-470
Authors:
Stefan Hirschberg (edt.)
Abstract:
In the context of Probabilistic Safety Assessment (PSA), three areas were investigated in a 4-year Nordic programme: dependencies with special emphasis on common cause failures,
human interactions and uncertainty aspects. The approach was centered around comparative
analyses in form of Benchmark/Reference Studies and retrospective reviews. Weak points in
available PSAs were identified and recommendations were made aiming at improving
consistency of the PSAs. The sensitivity of PSA-results to basic assumptions was
demonstrated and the sensitivity to data assignment and to choices of methods for analysis
of selected topics was investigated.