Software reliability analysis in probabilistic risk analysis

Jan-Erik Holmberg

Research output: Contribution to journalArticleScientificpeer-review


Probabilistic Risk Analysis (PRA) is a tool which can reveal shortcomings of the NPP design in general. PRA analysts have not had sufficient guiding principles in modelling particular digital components malfunctions. Digital I&C systems are mostly analysed simply and the software reliability estimates are engineering judgments often lacking a proper justification. The OECD/NEA Working Group RISK's task DIGREL develops a taxonomy of failure modes of digital I&C systems. The EU FP7 project HARMONICS develops software reliability estimation method based on an analytic approach and Bayesian belief network.
Original languageEnglish
Pages (from-to)281-291
JournalInternational Journal of Nuclear Safety and Simulation
Issue number4
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed


  • nuclear safety
  • software reliability
  • probabilistic risk analysis
  • Bayesian belief network


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