Threshold-Based Approach

Escalation thresholds are widely used as a baseline approach to the assessment of the hazard posed by domino scenarios. These should be intended as conservative values of physical effects (thermal radiation, maximum overpressure, etc.) below which the escalation is deemed not credible. The present section deals with this preliminary approach to domino hazard assessment, revising the values provided in the literature for escalation thresholds and providing suggested values based on recent results obtained in the revision of past accident data and in the modeling of equipment damage.