Failure possibilities for nuclear safety assessment by fault tree analysis

Publisher:
Inderscience Publishers
Publication Type:
Journal Article
Citation:
International Journal of Nuclear Knowledge Management, 2011, 5 (2), pp. 162 - 177
Issue Date:
2011-01
Full metadata record
Files in This Item:
Filename Description Size
Thumbnail2010003323OK.pdfPublished Version281.82 kB
Adobe PDF
Fault tree analysis (FTA) is a deductive tool to assess the safety of nuclear power plants. This analysis can only be implemented if all basic events in the tree have their corresponding failure rates. Therefore, safety analysts have to provide those failure rates well in advance. However, it is often difficult to obtain those failure rates due to insufficient data, changing environment or new components. This paper proposes a failure possibility based FTA approach to overcome the limitation of the conventional FTA for nuclear safety assessment. It utilises the concept of failure possibilities to evaluate basic event failure without historical data, fuzzy numbers to map component failure possibilities into mathematical form and defuzzification algorithms to convert fuzzy numbers into component failure rates. A case study on evaluating a typical high pressure core spray system of a boiling water reactor illustrates the applicability of the proposed approach.
Please use this identifier to cite or link to this item: