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 Sept 201926 Sept 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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