Modelling software failures of digital I&C in probabilistic safety analyses

Mariana Jockenhövel-Barttfeld, Ola Bäckström, Jan-Erik Holmberg, Markus Porthin, Andre Taurines, Tero Tyrväinen

    Research output: Contribution to journalArticleScientificpeer-review


    Digital instrumentation and control systems (I&C) are appearing as upgrades in older nuclear power plants (NPPs) and are commonplace in new NPPs. To assess the risk of NPP operation and to determine the risk impact of digital system upgrades on NPPs, quantifiable reliability models are needed along with data for digital systems that are suitable for using in existing probabilistic safety assessments (PSA). This paper presents a methodology for the consideration of software failures of I&C systems in nuclear PSA context. Evidence of operational data of the digital system platform TELEPERMr XS (TXS) developed at AREVA GmbH is considered in the software failure probability quantification process.
    Original languageEnglish
    Pages (from-to)151-158
    Journalatw - International Journal for Nuclear Power
    Issue number3
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed


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