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dc.contributor.authorJigar, Abraham Almaw
dc.contributor.authorLiu, Yiliu
dc.contributor.authorLundteigen, Mary Ann
dc.date.accessioned2016-08-12T07:16:19Z
dc.date.accessioned2016-08-25T12:43:23Z
dc.date.available2016-08-12T07:16:19Z
dc.date.available2016-08-25T12:43:23Z
dc.date.issued2016
dc.identifier.citationReliability Engineering & System Safety 2016, 156:15-23nb_NO
dc.identifier.issn0951-8320
dc.identifier.urihttp://hdl.handle.net/11250/2401770
dc.description.abstractSafety-instrumented systems are used in industries to prevent the development of a process upset into an accident. For most processes, the desired response in the case of a process upset is to shutdown the process, and most safety-instrumented systems are designed so that this state is achieved in response to also specific item failures or loss of power. The side-effect of such fail-safe design may be that the safety-instrumented system is prone to spurious activation, meaning that the normal operation of the process may be interrupted in an untimely manner. In the design of a safety-instrumented system, it is therefore important to quantify the rate of spurious activation and to check the need for additional measures to ensure a stable as well as safe operation of the process. Unfortunately, weaknesses have been identified in formulas for spurious trip rate, and the aim of this paper is to present a further development of currently available analytical formulas. The paper builds the new formulas on a thorough discussion of the concepts of spurious activation, failure classification, and failure propagation in a safety-instrumented system. The proposed formulas are compared with existing ones for selected architectures, and some conclusions are drawn.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.subjectSpurious activation; Spurious operation; Spurious trip rate (STR); Safety-instrumented system (SIS); Systematic failure; Common cause failure (CCF)nb_NO
dc.titleSpurious activation analysis of safety-instrumented systemsnb_NO
dc.typeJournal articlenb_NO
dc.typePreprintnb_NO
dc.date.updated2016-08-12T07:16:19Z
dc.source.pagenumber15-23nb_NO
dc.source.volume156nb_NO
dc.source.journalReliability Engineering & System Safetynb_NO
dc.identifier.doi10.1016/j.ress.2016.06.015
dc.identifier.cristin1372282
dc.description.localcode© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/nb_NO


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