Safeguards identification in computer aided HAZOP study by means of multilevel flow modelling

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Multilevel Flow Modelling (MFM) was proposed as a knowledge representation method for Hazard and Operability
    Studies (HAZOPs). MFM reasoning software can facilitate the cause-consequence analysis during the HAZOP analysis of
    whole life cycle of the plant. Recent studies have further confirmed that MFM offers the opportunity to redeploy the
    insights achieved by the HAZOP team to assist an operator dealing with an abnormal event. However, past studies into
    MFM-based HAZOP have been lacking in the specification of the principle. This principle makes MFM possible to determine safeguards for studied hypothetical events. This paper proposes such principle, which further increases the application of computer aids in HAZOP studies. The paper provides an analysis and classification of different types of safeguards on the functional level and introduces the safeguards into MFM methodology. It further presents an MFM-specific barrier function and its reasoning rules. The safeguard representation and reasoning transparency explicitly the relationship between suitable safeguards and hypothetical events given knowledge about the complex interdependencies between process design, equipment design, safety barriers and instrumentation. Based on the principles developed, an existing MFM model of a typical oil and gas process module is extended with explicit safety functions and used as an example for utilizing the specified principle for identification of safeguards. Potential safeguards for the process module are produced as the results.
    Original languageEnglish
    JournalProceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability
    Volume2022
    Issue numberESREL2020 PSAM15
    Number of pages25
    ISSN1748-006X
    DOIs
    Publication statusPublished - 2022
    Event30th European Safety and Reliability Conference and the 15th Probabilistic Safety Assessment and Management Conference - Venice, Italy
    Duration: 1 Nov 20205 Nov 2020
    https://www.esrel2020-psam15.org/

    Conference

    Conference30th European Safety and Reliability Conference and the 15th Probabilistic Safety Assessment and Management Conference
    Country/TerritoryItaly
    CityVenice
    Period01/11/202005/11/2020
    Internet address

    Keywords

    • Artificial intelligence
    • Knowledge representation
    • Knowledge-based reasoning
    • Safety functions
    • Multilevel flow modelling

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