MODIG - Modelling the reliability of digital I&C in modern nuclear power plants

Ola Bäckström, Jan-Erik Holmberg, Markus Porthin, Tero Tyrväinen

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

Abstract

The Nordic R&D project MODIG (MODelling of DIGital I&C) aims to get a consensus approach for a reliability analysis of a plant design with digital I&C. The relevant part of the project for this paper is software failure probability quantification. To be able to define relevant software failure modes the I&C system needs to be split into a number of entities. The software entities are basically system software and application software. The system software can be further split into the run time environment and communication software. The failure modes applicable for each type of software differ. The approach to estimate the probability for various software failure modes is also discussed. System software failure probability estimate should be based on operational experience. Also the probability that an application software causes a fatal failure of the processor (crash) could be estimated based on operational experience. Non-fatal failures (functional failure without processor crash) for application software has to be treated differently, as sufficient operational data is not available. The non-fatal failure probability is suggested to be estimated based on an analytical approach using metrics of complexity and verification and validation.
Original languageEnglish
Title of host publicationPSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management
PublisherInternational Association of Probabilistic Safety Assessment and Management IAPSAM
Publication statusPublished - 2016
MoE publication typeA4 Article in a conference publication
Event13th International Conference on Probabilistic Safety Assessment and Management - Sheraton Grande Walkerhill, Seoul, Korea, Republic of
Duration: 2 Oct 20167 Oct 2016
Conference number: 13

Conference

Conference13th International Conference on Probabilistic Safety Assessment and Management
Abbreviated titlePSAM 13
CountryKorea, Republic of
CitySeoul
Period2/10/167/10/16

Fingerprint

Nuclear power plants
Application programs
Failure modes
Computer systems
Reliability analysis
Communication

Keywords

  • digital I&C
  • probabilistic risk assessment
  • reliability

Cite this

Bäckström, O., Holmberg, J-E., Porthin, M., & Tyrväinen, T. (2016). MODIG - Modelling the reliability of digital I&C in modern nuclear power plants. In PSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management International Association of Probabilistic Safety Assessment and Management IAPSAM.
Bäckström, Ola ; Holmberg, Jan-Erik ; Porthin, Markus ; Tyrväinen, Tero. / MODIG - Modelling the reliability of digital I&C in modern nuclear power plants. PSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management. International Association of Probabilistic Safety Assessment and Management IAPSAM, 2016.
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Bäckström, O, Holmberg, J-E, Porthin, M & Tyrväinen, T 2016, MODIG - Modelling the reliability of digital I&C in modern nuclear power plants. in PSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management. International Association of Probabilistic Safety Assessment and Management IAPSAM, 13th International Conference on Probabilistic Safety Assessment and Management, Seoul, Korea, Republic of, 2/10/16.

MODIG - Modelling the reliability of digital I&C in modern nuclear power plants. / Bäckström, Ola; Holmberg, Jan-Erik; Porthin, Markus; Tyrväinen, Tero.

PSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management. International Association of Probabilistic Safety Assessment and Management IAPSAM, 2016.

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

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Bäckström O, Holmberg J-E, Porthin M, Tyrväinen T. MODIG - Modelling the reliability of digital I&C in modern nuclear power plants. In PSAM 13, 13th International Conference on Probabilistic Safety Assessment and Management. International Association of Probabilistic Safety Assessment and Management IAPSAM. 2016