4. Bow tie quantification
4.1 Principle of quantification
Quantifying a bowtie, the aim of which is to estimate the probabilities of occurrence of hazardous phenomena, requires first assessing those of the dreaded event. This is followed by assigning failure probabilities to the mitigation/protection barriers listed in the event tree, in order to deduce the probabilities of the hazardous phenomena.
Quantifying a bowtie involves three main steps (figure 16 ):
1. evaluation of the frequency of occurrence of the feared event, either "directly" by referring to...
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Bow tie quantification
Limits to bow-tie quantification
Bibliography
Standards and norms
- Analyse par arbre de panne (AAP) - NF EN 61025 -
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 (Ministerial Order of September 29, 2005 on the assessment and consideration of the probability of occurrence, the kinetics and intensity of effects...
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