Formalized Search Strategies for Human Risk Contributions: A Framework for Further Development

Jens Rasmussen, O. M. Pedersen

    Research output: Book/ReportReportResearch

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    For risk management, the results of a probabilistic risk analysis (PRA) as well as the underlying assumptions can be used as references in a closed-loop risk control; and the analyses of operational experiences as a means of feedback. In this context, the need for explicit definition and documentation of the PRA coverage, including the search strategies applied, is discussed and aids are proposed such as plant description in terms of a formal abstraction hierarchy and use of cause-consequence-charts for the documentation of not only the results of PRA but also of its coverage. Typical human risk contributions are described on the basis of general plant design features relevant for risk and accident analysis. With this background, search strategies for human risk contributions are treated: Under the designation "work analysis", procedures for the analysis of familiar, well trained, planned tasks are proposed. Strategies for identifying human risk contributions outside this category are outlined.
    Original languageEnglish
    Place of PublicationRoskilde
    PublisherRisø National Laboratory
    Number of pages32
    ISBN (Print)87-55-00865-8
    Publication statusPublished - 1982


    • Risø-M-2351
    • Failure mode analysis
    • Human factors
    • Industrial plants
    • Nuclear power plants
    • Probability
    • Risk analysis


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