PSAM 16 Conference Paper Overview
Welcome to the PSAM 16 Conference paper and speaker overview page.
Lead Author: Anders Olsson Co-author(s): Francesco Di Dedda (francesco.didedda@vysusgroup.com)
Lovisa Nordlöf (lovisa.nordlof@okg.uniper.energy)
| Availability and reliability analysis of Independent Core Cooling at Oskarshamn 3 |
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| In unit 3 at Oskarshamn NPP an independent core cooling function has been installed (OBH). Besides incorporating the OBH function in the PSA, an analysis has also been performed of its availability and reliability. As the OBH function is designed to operate during long time periods and under severe conditions, the mission time was extended to 72 hours. Even though a “standard PSA” is supposed to be a realistic assessment, compromise is necessary in terms of the assumptions and simplifications, which may or may not contribute to the results of the PSA. Such assumptions and simplifications are of course an important aspect of the uncertainties. When a single system or function is analysed, the importance of these may be more significant. A crucial part of the analysis was therefore to identify and reduce embedded conservatisms in the PSA. As a prolonged mission time was studied, another important aspect covered in the analysis was the repair of failed components. As the analysis covered both power operation mode and shutdown, different conditions for conducting repair were considered. The presentation will focus on challenges encountered and how they were handled including how the results were evaluated, i.e. was it possible to demonstrate that the OBH function is as reliable as expected. |
Paper AN79 Preview
Author and Presentation Info
Lead Author Name: Anders Olsson (anders.olsson@vysusgroup.com)
Bio: Anders Olsson holds a master’s degree in Mechanical Engineering and has since 1995 been working in the nuclear industry. He started at ABB Atom where he mainly performed various thermal hydraulic analysis and worked with structural verification. Since 1999 his main focus has been Probabilistic Risk Assessment where he now has extensive experience in PSA Level 1 and 2 for all operating modes including Human Reliability Analysis. He also holds a position as Vice President in Vysus Group with responsibility for the operation of the nuclear consultancy in Sweden.
Country: Sweden
Company: Vysus Group
Job Title: Vice President Nuclear
Bio: Anders Olsson holds a master’s degree in Mechanical Engineering and has since 1995 been working in the nuclear industry. He started at ABB Atom where he mainly performed various thermal hydraulic analysis and worked with structural verification. Since 1999 his main focus has been Probabilistic Risk Assessment where he now has extensive experience in PSA Level 1 and 2 for all operating modes including Human Reliability Analysis. He also holds a position as Vice President in Vysus Group with responsibility for the operation of the nuclear consultancy in Sweden.
Country: Sweden
Company: Vysus Group
Job Title: Vice President Nuclear