Approaches to estimate pipe failure rates for risk-informed in-service applications at nuclear power plants

Otso Cronvall, Arja Saarenheimo, Kaisa Simola, Heli Talja

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

    Abstract

    Piping failure frequencies are needed e.g. for quantifying initiating event frequencies in probabilistic safety assessments (PSA), and for the application of quantitative risk-informed in-service inspection methodology. The paper summaries different approaches to estimate failure frequencies of piping at nuclear power plants (NPPs). These approaches are the use of structural reliability models, statistical estimation from operating experience data and the use of expert judgement for probability statements based on e.g. deterministic analyses. We illustrate the use of these approaches with a simple example. Further we discuss what kind of input data is needed and evaluate their availability.
    Original languageEnglish
    Title of host publicationProceedings of the 25th ESReDA Seminar
    Number of pages13
    Publication statusPublished - 2003
    MoE publication typeA4 Article in a conference publication
    EventESReDA 25th Seminar: Lifetime Management of Structures - Paris, France
    Duration: 17 Nov 200319 Nov 2003

    Seminar

    SeminarESReDA 25th Seminar
    CountryFrance
    CityParis
    Period17/11/0319/11/03

    Keywords

    • risk analysis
    • RI-ISI
    • probability
    • fracture mechanics
    • database
    • analysis code
    • NPP
    • piping

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