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6. Conclusion
The requirements for MMRI introduced by the Order of October 4, 2010 reinforce those already introduced by the Order of September 29, 2005. This decree, which covers all MMRs and not just MMRIs, requires proof of effectiveness, implementation kinetics, testability and maintainability before an MMR can be selected as part of an accident probability assessment. Although these various criteria were already covered in the context of hazard studies, it has to be admitted that the elements needed to assess the resources deployed to guarantee their durability over time were poorly developed. The requirements relating to MMRI fill this gap by encouraging manufacturers to formalize the actions implemented to combat the aging of these systems, which can lead to a drift in their performance.
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Bibliography
Digital media
Methodological guide for managing and controlling the ageing of instrumented risk control measures (MMRI), July 2011 http://www.uic.fr/plan-modernisation.asp
Guide to instrumented risk control measures – Version dated September 4, 2013
Websites
BADORIS: this access portal groups together summaries of safety devices by type of process equipment and safety function to be ensured, examining the strengths and weaknesses of each of the equipment and techniques identified. http://www.ineris.fr/badoris
Standards and norms
- Sécurité fonctionnelle des systèmes électriques/électroniques/électroniques programmables relatifs à la sécurité - CEI 61508 -
- Sécurité fonctionnelle des systèmes instrumentés de sécurité pour le secteur de l'industrie des procédés continus - CEI 61511 -
Regulations
Arrêté ministériel du 29 septembre 2005 relatif à l'évaluation et à la prise en compte de la probabilité d'occurrence, de la cinétique et de l'intensité des effets et de la gravité des conséquences des accidents potentiels dans les études de dangers des IC soumises à autorisation.
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Association of Measurement, Control and Automation Equipment Operators (EXERA) http://www.exera.com
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