A model driven approach for early assessment of defense in depth capabilities of complex sociotechnical systems

Nikolaos Papakonstantinou, Teemu Tommila, Bryan O'Halloran, Jarmo Alanen, Douglas L. Van Bossuyt

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

    4 Citations (Scopus)

    Abstract

    Defense in Depth (DiD) is a key design principle helping to improve the safety of complex systems in domains like nuclear power, oil and gas, and mining. DiD affects the basic design of the system because it contains requirements for isolation, diversity and safety divisions. If the DiD assessment happens late in the design process, there is a risk of costly redesign and project delays. To avoid this issue, this paper refines a set of early DiD assessment design rules and proposes a model-driven methodology for early assessment of the implementation of the DiD capabilities of a complex system design. The topology of the different design aspects of the system under study (mechanical, electrical, human factors, and others) and the dependencies between system elements are captured in a High Level Interdisciplinary Model (HLIM) that also holds DiD specific attributes. The resulting system model is assessed against the proposed set of DiD rules and requirements, and then it can be improved according to the results. The methodology is applied to a case study of an early nuclear power plant model of a spent fuel pool cooling system. The proof-of-concept software tool developed for early DiD assessment and presented in this paper is able to identify undesired dependencies between system elements of redundant systems, of different defense lines and other DiD related weaknesses. This provides practitioners with insights into potential vulnerabilities in the design and enables focused redesign to address the identified problems early in the design process.
    Original languageEnglish
    Title of host publicationASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
    Subtitle of host publication37th Computers and Information in Engineering Conference
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Number of pages10
    Volume1
    ISBN (Print)978-0-7918-5811-0
    DOIs
    Publication statusPublished - 1 Jan 2017
    MoE publication typeA4 Article in a conference publication
    Event13th ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications - Cleveland, United States
    Duration: 6 Aug 20179 Aug 2017
    Conference number: 13

    Conference

    Conference13th ASME/IEEE International Conference on Mechatronic and Embedded Systems and Applications
    Abbreviated titleIDETC/CIE 2017
    Country/TerritoryUnited States
    CityCleveland
    Period6/08/179/08/17

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