Feasibility study on the integration of PRA methods and model checking

Jussi Lahtinen, Kim Björkman

    Research output: Book/ReportReport

    Abstract

    Digital instrumentation and control (I&C) systems play an important role in the operation of nuclear power plants (NPP). The safety and reliability analysis of such systems is challenging. We have focused on the use of two methods: model checking for verifying the correctness of I&C systems, and fault tree analysis (FTA) in the context of probabilistic risk assessment (PRA). Model checking is a formal method capable of exhaustively analysing system behaviour. Fault tree analysis is a top down approach used for failure analysis. Neither approach can sufficiently analyse situations involving both software design errors and hardware failures. In this paper, we look for different ways to solve this issue and to integrate and couple these two methods to enable more extensive or practical safety analysis of digital I&C systems. We identify several potential integration approaches and analyse their feasibility. We also propose a concrete concept-level coupling approach, and experiment with it in practice using a small example model.
    Original languageEnglish
    PublisherVTT Technical Research Centre of Finland
    Number of pages26
    Publication statusPublished - 2015
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesVTT Research Report
    VolumeVTT-R-04924-15

    Fingerprint

    Fault tree analysis
    Model checking
    Risk assessment
    Formal methods
    Software design
    Reliability analysis
    Nuclear power plants
    Failure analysis
    Concretes
    Hardware
    Experiments

    Keywords

    • probabilistic risk assessment
    • model checking
    • integration
    • nuclear
    • automation

    Cite this

    Lahtinen, J., & Björkman, K. (2015). Feasibility study on the integration of PRA methods and model checking. VTT Technical Research Centre of Finland. VTT Research Report, Vol.. VTT-R-04924-15
    Lahtinen, Jussi ; Björkman, Kim. / Feasibility study on the integration of PRA methods and model checking. VTT Technical Research Centre of Finland, 2015. 26 p. (VTT Research Report, Vol. VTT-R-04924-15).
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    abstract = "Digital instrumentation and control (I&C) systems play an important role in the operation of nuclear power plants (NPP). The safety and reliability analysis of such systems is challenging. We have focused on the use of two methods: model checking for verifying the correctness of I&C systems, and fault tree analysis (FTA) in the context of probabilistic risk assessment (PRA). Model checking is a formal method capable of exhaustively analysing system behaviour. Fault tree analysis is a top down approach used for failure analysis. Neither approach can sufficiently analyse situations involving both software design errors and hardware failures. In this paper, we look for different ways to solve this issue and to integrate and couple these two methods to enable more extensive or practical safety analysis of digital I&C systems. We identify several potential integration approaches and analyse their feasibility. We also propose a concrete concept-level coupling approach, and experiment with it in practice using a small example model.",
    keywords = "probabilistic risk assessment, model checking, integration, nuclear, automation",
    author = "Jussi Lahtinen and Kim Bj{\"o}rkman",
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    Lahtinen, J & Björkman, K 2015, Feasibility study on the integration of PRA methods and model checking. VTT Research Report, vol. VTT-R-04924-15, VTT Technical Research Centre of Finland.

    Feasibility study on the integration of PRA methods and model checking. / Lahtinen, Jussi; Björkman, Kim.

    VTT Technical Research Centre of Finland, 2015. 26 p. (VTT Research Report, Vol. VTT-R-04924-15).

    Research output: Book/ReportReport

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    AB - Digital instrumentation and control (I&C) systems play an important role in the operation of nuclear power plants (NPP). The safety and reliability analysis of such systems is challenging. We have focused on the use of two methods: model checking for verifying the correctness of I&C systems, and fault tree analysis (FTA) in the context of probabilistic risk assessment (PRA). Model checking is a formal method capable of exhaustively analysing system behaviour. Fault tree analysis is a top down approach used for failure analysis. Neither approach can sufficiently analyse situations involving both software design errors and hardware failures. In this paper, we look for different ways to solve this issue and to integrate and couple these two methods to enable more extensive or practical safety analysis of digital I&C systems. We identify several potential integration approaches and analyse their feasibility. We also propose a concrete concept-level coupling approach, and experiment with it in practice using a small example model.

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    Lahtinen J, Björkman K. Feasibility study on the integration of PRA methods and model checking. VTT Technical Research Centre of Finland, 2015. 26 p. (VTT Research Report, Vol. VTT-R-04924-15).