Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA

Jan-Erik Holmberg, Stefan Authén, Abdallah Amri

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

Abstract

To assess the risk of nuclear power plant operation and to determine the risk impact of digital systems, there is a need to quantitatively assess the reliability of the digital systems in a justifiable manner. Due to the many unique attributes of digital systems, a number of modelling and data collection challenges exist, and consensus has not yet been reached. The OECD/NEA CSNI Working Group on Risk Assessment (WGRisk) has set up a task group called DIGREL to develop a taxonomy of failure modes of digital components for the purposes of probabilistic safety assessment (PSA). An activity focused on development of a common failure modes taxonomy is seen as a step towards standardised digital I&C reliability assessment techniques. Needs from PSA will guide the work, meaning e.g. that I&C system and its failures are studied from their functional significance point of view. The taxonomy will be the basis of modelling and quantification efforts. It will also help to define a structure for data collection and to review PSA. DIGREL will take advantage from R&D activities, actual PSA applications as well as experience related to digital systems. The scope of the taxonomy includes both protection and control systems, though primary focus is on protection systems. The taxonomy is divided into hardware and software related failure modes, for which purpose example taxonomies have been collected from the member countries. A representative fictive digital protection system example has been developed to be used as a reference in the demonstration of the taxonomy. With regard to the hardware failure modes taxonomy, the main issue is to define a feasible level of details. Module level, i.e., subcomponents of processing units, seems to be the most appropriate from the PSA modelling point of view. The software failure modes taxonomy is focused on identifying and defining which common cause failures are reasonable to postulate
Original languageEnglish
Title of host publicationProceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference
Subtitle of host publicationPSAM11 ESREL 2012
Pages1887-1894
Volume3
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
Event11th International Probabilistic Safety Assessment and Management Conference and The Annual European Safety and Reliability Conference, PSAM11 & ESREL 2012 - Helsinki, Finland
Duration: 25 Jun 201229 Jun 2012

Conference

Conference11th International Probabilistic Safety Assessment and Management Conference and The Annual European Safety and Reliability Conference, PSAM11 & ESREL 2012
CountryFinland
CityHelsinki
Period25/06/1229/06/12

Fingerprint

Taxonomies
Failure modes
Hardware
Risk assessment
Nuclear power plants
Demonstrations
Control systems
Processing

Keywords

  • PRA
  • PSA
  • digital I&C
  • failure modes taxonomy

Cite this

Holmberg, J-E., Authén, S., & Amri, A. (2012). Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA. In Proceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference: PSAM11 ESREL 2012 (Vol. 3, pp. 1887-1894)
Holmberg, Jan-Erik ; Authén, Stefan ; Amri, Abdallah. / Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA. Proceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference: PSAM11 ESREL 2012. Vol. 3 2012. pp. 1887-1894
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Holmberg, J-E, Authén, S & Amri, A 2012, Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA. in Proceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference: PSAM11 ESREL 2012. vol. 3, pp. 1887-1894, 11th International Probabilistic Safety Assessment and Management Conference and The Annual European Safety and Reliability Conference, PSAM11 & ESREL 2012, Helsinki, Finland, 25/06/12.

Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA. / Holmberg, Jan-Erik; Authén, Stefan; Amri, Abdallah.

Proceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference: PSAM11 ESREL 2012. Vol. 3 2012. p. 1887-1894.

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

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Holmberg J-E, Authén S, Amri A. Development of best practice guidelines on failure modes taxonomy for reliability assessment of digital I&C systems for PSA. In Proceedings of the 11th International Probabilistic Safety Assessment and Management Conference & The Annual European Safety and Reliability Conference: PSAM11 ESREL 2012. Vol. 3. 2012. p. 1887-1894