TY - GEN
T1 - A safety-based resilience quantification framework for safety critical systems
AU - Santhosh, T. V.
AU - Patelli, Edoardo
AU - Gopika, V.
N1 - Publisher Copyright:
© 2022 ESREL2022 Organizers. Published by Research Publishing, Singapore.
PY - 2022/8/28
Y1 - 2022/8/28
N2 - 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.
AB - 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.
KW - critical infrastructure
KW - human factors
KW - nuclear power plant
KW - reliability
KW - resilience
KW - safety
UR - http://www.scopus.com/inward/record.url?scp=85208276991&partnerID=8YFLogxK
U2 - 10.3850/978-981-18-5183-4_S08-05-444-cd
DO - 10.3850/978-981-18-5183-4_S08-05-444-cd
M3 - Conference contribution book
AN - SCOPUS:85208276991
SN - 9789811851834
T3 - Proceedings of the 32nd European Safety and Reliability Conference, ESREL 2022 - Understanding and Managing Risk and Reliability for a Sustainable Future
SP - 2215
EP - 2222
BT - Proceedings of the 32nd European Safety and Reliability Conference, ESREL 2022 - Understanding and Managing Risk and Reliability for a Sustainable Future
A2 - Leva, Maria Chiara
A2 - Patelli, Edoardo
A2 - Podofillini, Luca
A2 - Wilson, Simon
CY - Singapore
T2 - 32nd European Safety and Reliability Conference, ESREL 2022
Y2 - 28 August 2022 through 1 September 2022
ER -