Effect Of Selected Factors On The Safety Integrity Level (SIL)

• Main Authors: Stanisław Młynarski, Robert Pilch, Grzegorz Kaczor, Maksymilian Smolnik, Maciej Szkoda, Jan Szybka
• Format: Article
• Language: English
• Published: Sciendo 2015-11-01
• Series: Journal of KONBiN
• Subjects: safety; safety integrity levels (sil); reliability-wise configuration; repair time; bezpieczeństwo; poziomy nienaruszalności sil; struktura niezawodnościowa; czas odnowy
• Online Access: https://doi.org/10.1515/jok-2015-0042

The presented paper concerns the functional safety problems of technical systems. The characteristics of safety assessment, described in IEC 61508 standard are an introduction to the problems associated with the methodology of the calculation of Safety Integrity Levels (SIL). The parameters obtained from reliability indicators, were calculated for the purpose of assessing the impact of repair time for the elements of a given system on the SIL. The calculated values of failure rate and the probability of dangerous failure show the sensitivity of the system at different time to repair values for various reliability-wise configurations. The indicators characterizing the safety level, calculated of the system with no repair time are the basis for demonstrating the influence of repair on the safety integrity level.