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NKS-R Level 3 PSA seminar

20th January 2015, ÅF, Frösundaleden 2, 169 99 Solna, Sweden



The objective of this seminar is to present and discuss the progress of the NPSAG/NKS Level 3 Probabilistic Safety Assessment Project and to receive feedback from participants for future and ongoing tasks.



Interest in Level 3 off-site consequence probabilistic safety assessment (PSA) has increased in the Nordic region, which is consistent with renewed interest in Level 3 PSA throughout the world. The goal of the project is to assess the capabilities and applications of Level 3 PSA in order to further understanding of the influences and impacts of off-site consequences, mitigative actions, and to indicate any potential impacts on Level 1 and particularly Level 2 PSA to consider when performing Level 3 PSA. The project is in its second year, and is co-financed by NKS, NPSAG and SAFIR (Finnish research on NPP safety), and is being performed by a consortium of Risk consultancies including Lloyd's Register Consulting, Risk Pilot, ÅF, and VTT. The project is planned to continue through 2015 with the final result of the project being a guidance document on Level 3 PSA that will portray Nordic perspectives on the subject.

Findings from the project focusing on the progress achieved during the second year of the project was presented during the seminar.


About 20 participants attended the seminar. Participants included people from the working group and stakeholders, including the authorities. 


Meeting topics 

  • Review of first year activities
    • Industrial survey
    • Appropriate risk metrics
    • Regulations, guides and standards
  • Finnish Level 3 PSA pilot study
  • Swedish Level 3 PSA pilot study
  • Progress on Level 3 PSA guidance document
  • Group discussion


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