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Layer Of Protection Analysis: Pilotstudie, metodutveckling och tillämpning på ett konventionellt hydrauliskt bromssystem
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2019 (Swedish)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesisAlternative title
Layer Of Protection Analysis: Pilot study, method development and application on a hydraulic braking system (English)
Abstract [en]

Within the safety analysis industry there are a variety of tools used to ensure reliability and security of systems, ranging from mostly qualitative approaches to mostly quantitative. One safety analysis method that lies in between these two is called Layers Of Protection Analysis (LOPA). LOPA is known as a “semi-quantitative” approach that uses a mix of quantitative and qualitative approaches to draw conclusions. In this masters thesis the LOPA approach is demonstrated, in addition to being developed into two alternate LOPA approaches, known as MarkovLOPA and RBDLOPA. These two developed approaches use the concept of Markov chains and Reliability block diagram (RBD) respectively, to extend the applicability of the traditional LOPA methodology. Furthermore, a conventional hydraulic braking system (CHB), which includes ABS/TCS- and ESP functionality was analysed by these three methodologies. The results of the analysis show that in the analysis by LOPA and RBDLOPA 4- and 3 out of 10 scenarios need slight improvements and only 1 scenario for MarkovLOPA. Additionally, the validity of the alternative approaches are analysed by a sensitivity analysis, showing irregularities in the results, leading to the conclusion that further research and development is required prior to industrial applications of the approaches.

Place, publisher, year, edition, pages
2019. , p. 64
Series
UPTEC ES, ISSN 1650-8300 ; 19030
Keywords [en]
LOPA, Layer of protection analysis, conventional hydraulic braking system, PSA, Safety analysis, Markov, Reliability, RBD
Keywords [sv]
LOPA, Säkerhetsanalyser, Markov Kedja, PSA, Layer Of Protection Analysis, Hydrauliskt bromssystem, Tillförlitlighet, RBD
National Category
Probability Theory and Statistics Energy Engineering Reliability and Maintenance
Identifiers
URN: urn:nbn:se:uu:diva-394019OAI: oai:DiVA.org:uu-394019DiVA, id: diva2:1356619
External cooperation
Risk Pilot AB
Educational program
Master Programme in Energy Systems Engineering
Supervisors
Examiners
Available from: 2019-10-09 Created: 2019-10-01 Last updated: 2019-10-09Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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Language
  • de-DE
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  • nn-NB
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  • Other locale
More languages
Output format
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