Abstract
Risk follow-up aims at analysis of operational events from their risk point of view using probabilistic safety assessment (PSA) as the basis. Risk follow-up provides additional insight to operational experience feedback compared to deterministic event analysis. Even though this application of PSA is internationally widely spread and tried out for more than a decade at many nuclear power plants, there are several problematic issues in the performance of a retrospective risk analysis 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 this topic. The main development needs were seen in the handling of CCF and the reference levels for result presentation. CCF events can be difficult to assess due to possibilities to interpret the event differently. Therefore a sensitivity study with varying assumptions is recommended as a general approach. Reference levels for indicators are proposed based on the survey of criteria used internationally. The paper summarizes the results.
| Original language | English |
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| Title of host publication | Proceedings of PSAM 10 |
| Subtitle of host publication | International Probabilistic Safety Assessment & Management Conference, 7–11 June 2010, Seattle, Washington, USA |
| Publisher | International Association of Probabilistic Safety Assessment and Management IAPSAM |
| Pages | 337-348 |
| ISBN (Print) | 978-1-4507-1556-0 |
| Publication status | Published - 2010 |
| MoE publication type | A4 Article in a conference publication |
| Event | 10th International Probabilistic Safety Assessment & Management Conference, PSAM 10 - Seattle, United States Duration: 7 Jun 2010 → 11 Jun 2010 |
Conference
| Conference | 10th International Probabilistic Safety Assessment & Management Conference, PSAM 10 |
|---|---|
| Abbreviated title | PSAM 10 |
| Country/Territory | United States |
| City | Seattle |
| Period | 7/06/10 → 11/06/10 |
Keywords
- PSA
- risk follow-up
- PSA application
- CCF