Coupling Model Checking and PSA: A Case Study

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


Performing exhaustive model checking for a digital instrumentation and control (I&C) system, when both hardware failures and the detailed functionality of the I&C system are considered, can be challenging due to scalability issues. In our previous work, we have proposed a coupling approach where the model checking analysis is restricted to a limited set of postulated hardware failures based on probabilistic safety assessment (PSA) results, potentially improving scalability of model checking. Based on the pilot case study using a small example system, the coupling approach should scale quite well to larger systems. In this paper, we study the applicability of the coupling approach by performing a case study using a more complex example system, based on a fictitious reference model of a boiling water nuclear reactor. Compared to unrestricted model checking analysis, the computation times decreased considerably when the analysis was restricted. Still, the overall process for introducing the failures requires a lot of manual labor, and needs to be automated.
Original languageEnglish
Title of host publicationProceedings of the 29th European Safety and Reliability Conference, ESREL 2019
EditorsMichael Beer, Enrico Zio
PublisherEuropean Safety and Reliability Association (ESRA)
Number of pages8
ISBN (Electronic)978-981-11-2724-3
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication
Event29th European Safety and Reliability Conference, ESREL 2019 - Welfenschloss, Hannover, Germany
Duration: 22 Sep 201926 Sep 2019


Conference29th European Safety and Reliability Conference, ESREL 2019
Internet address


  • Model checking
  • PSA
  • Digital I&C
  • Hardware failure
  • Verification
  • Scalability

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