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Reliability Model of a Safety System with an Imperfect Tester

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Current Trends in Reliability, Availability, Maintainability and Safety

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

High reliability digital systems designed for safety applications employ external or built in test and surveillance systems. The overall reliability is determined by the combined reliability of the safety system and that of the testing system. In this study we derive an expression for the overall system unavailability using Markov model and from that derive an approximate formula that could be used in fault tree analysis of larger systems. The approximate expression is validated by numerical case studies as applied to solid state voting logic with online fine impulse testing system (SLFIT) used in the shutdown system of a nuclear reactor.

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References

  1. Ramakrishnan M, John Arul A, Bhuvana V, Nagraj CP (2008) Reliability analysis of shutdown system, PFBR/66300/DN/1012

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  2. Ebeling CE (2000) Reliability and maintainability engineering. Tata McGraw-Hill Edition, New Delhi

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  3. Isograph Reliability Workbench 10.2. http://www.isograph.com/software/reliability-workbench/

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Acknowledgments

The author acknowledges the encouragement and guidance received from Director RDG and Director IGCAR.

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Authors and Affiliations

  1. IGCAR, 107 CDO Building, Kalpakkam, 603102, India

    Pramod Kumar Sharma

  2. IGCAR, 111H CDO Building, Kalpakkam, 603102, India

    A. John Arul

Authors
  1. Pramod Kumar Sharma
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  2. A. John Arul
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Corresponding author

Correspondence to Pramod Kumar Sharma .

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Editors and Affiliations

  1. Operation and Maintenance Engineering, Luleå, Sweden

    Uday Kumar

  2. Operation and Maintenance Engineering, Luleå, Sweden

    Alireza Ahmadi

  3. ATOM, University College, Haugesund, Norway

    Ajit Kumar Verma

  4. Bhabha Atomic Research Centre, Research Reactor Services Division, Mumbai, India

    Prabhakar Varde

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© 2016 Springer International Publishing Switzerland

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Sharma, P.K., John Arul, A. (2016). Reliability Model of a Safety System with an Imperfect Tester. In: Kumar, U., Ahmadi, A., Verma, A., Varde, P. (eds) Current Trends in Reliability, Availability, Maintainability and Safety. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-23597-4_37

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  • DOI: https://doi.org/10.1007/978-3-319-23597-4_37

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-23596-7

  • Online ISBN: 978-3-319-23597-4

  • eBook Packages: EngineeringEngineering (R0)

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