Timed model checking of fault-tolerant nuclear I&C systems

Igor Buzhinsky, Antti Pakonen

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

Abstract

Certain safety-critical systems, such as nuclear instrumentation and control (I&C) systems, must be ensured to be correct. One of the approaches of doing this is formal verification and, in particular, model checking, which thoroughly examines the state space of the formal model of the system. To make model checking computationally feasible, many simplifying assumptions, often referred to as abstractions, are made. One of such abstractions is the assumption of discrete time. However, when I&C systems are considered working in the real world, where communication delays and failures are possible, this assumption becomes less realistic, calling for the need for richer formalisms.In this paper, using timed automata, we extend our previous model checking approach for nuclear I&C systems to account for continuous time. We apply our approach to a reactor protection system case study and show that continuous-time verification is in general feasible, although proving the satisfaction of certain system properties still remains a computational challenge.
Original languageEnglish
Title of host publicationProceedings of 18th IEEE International Conference on Industrial Informatics, INDIN 2020
PublisherIEEE Institute of Electrical and Electronic Engineers
Pages159-164
Number of pages6
Publication statusPublished - 20 Jul 2020
MoE publication typeA4 Article in a conference publication
Event18th IEEE International Conference on Industrial Informatics, INDIN 2020: Online - Virtual, Warwick, United Kingdom
Duration: 20 Jul 202023 Jul 2020

Conference

Conference18th IEEE International Conference on Industrial Informatics, INDIN 2020
Abbreviated titleINDIN 2020
CountryUnited Kingdom
CityWarwick
Period20/07/2023/07/20

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