A safety-based resilience quantification framework for safety critical systems

T. V. Santhosh, Edoardo Patelli, V. Gopika

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Resilience is a concept that, of late, has attracted significant interest in almost every field of science and engineering. Although a large number of definitions to resilience exists, they are associate by criticism on ambiguous definitions, vague performance metrics, and unrealistic applications. In addition, evaluation methods to quantify resilience of critical systems are still missing at large. In principle, systems are expected to be restored from many options to regain the performance upon a disruptive event, and each recovery path has its own success probability, a global resilience metric to a critical system having such many recovery options can be defined. However, it is practically impossible to demonstrate through acceptable risk derived from the traditional risk analysis covering all maximum credible events. It is highly likely that the unknown threats challenge the safety at certain point in time during operation. Hence, for safety critical systems the performance-resilience alone cannot be the primary objective, instead system must also satisfy the safety-resilience objective. This paper presents a safety-based resilience quantification framework for safety critical systems. This approach not only assess the system from performance-resilience perspective but also integrates the safety element into the quantification of global resilience metric. The proposed approach has been applied to a case study of nuclear power plant and global resilience metric with and without the safety aspect has been computed.

Original languageEnglish
Title of host publicationProceedings of the 32nd European Safety and Reliability Conference, ESREL 2022 - Understanding and Managing Risk and Reliability for a Sustainable Future
EditorsMaria Chiara Leva, Edoardo Patelli, Luca Podofillini, Simon Wilson
Place of PublicationSingapore
Pages2215-2222
Number of pages8
DOIs
Publication statusPublished - 28 Aug 2022
Event32nd European Safety and Reliability Conference, ESREL 2022 - Dublin, Ireland
Duration: 28 Aug 20221 Sept 2022

Publication series

NameProceedings of the 32nd European Safety and Reliability Conference, ESREL 2022 - Understanding and Managing Risk and Reliability for a Sustainable Future

Conference

Conference32nd European Safety and Reliability Conference, ESREL 2022
Country/TerritoryIreland
CityDublin
Period28/08/221/09/22

Keywords

  • critical infrastructure
  • human factors
  • nuclear power plant
  • reliability
  • resilience
  • safety

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