Development of methods for risk follow-up and handling of CCF events in PSA applications
2010 (English)In: Proc. of PSAM 10 — International Probabilistic Safety Assessment & Management Conference, 7–11 June 2010, Seattle, Washington, USA, IAPSAM — International Association of Probabilistic Safety Assessment and Management, International Association for Probabilistic Safety Assessment and Management , 2010, 53- p.Conference paper (Refereed)
Risk follow-up aims at analysis of operational events from their risk point of view usingprobabilistic safety assessment (PSA) as the basis. Risk follow-up provides additional insight tooperational experience feedback compared to deterministic event analysis. Even though thisapplication of PSA is internationally widely spread and tried out for more than a decade at manynuclear power plants, there are several problematic issues in the performance of a retrospective riskanalysis as well as in the interpretation of the results.An R&D project sponsored by the Nordic PSA group (NPSAG) has focused on selected issues in thistopic. The main development needs were seen in the handling of CCF and the reference levels forresult presentation. CCF events can be difficult to assess due to possibilities to interpret the eventdifferently. Therefore a sensitivity study with varying assumptions is recommended as a generalapproach. Reference levels for indicators are proposed based on the survey of criteria usedinternationally. The paper summarizes the results.
Place, publisher, year, edition, pages
International Association for Probabilistic Safety Assessment and Management , 2010. 53- p.
PPSA, risk follow-up, PSA application, CCF
Probability Theory and Statistics
IdentifiersURN: urn:nbn:se:kth:diva-77626ISBN: 978-1-4507-1556-0OAI: oai:DiVA.org:kth-77626DiVA: diva2:491865
PSAM 10 — International Probabilistic Safety Assessment & Management Conference
QC 201204102012-02-072012-02-072012-04-10Bibliographically approved