Glossary
LOPA method evolutions

Couche de protection; layer of protection

This concept encompasses prevention, mitigation and protection barriers.

Danger; hazard

Potential source of damage ( IEC 61511 :2017 ).

Risk; risk

Combination of the probability of damage and its severity ( IEC 61511 :2017 ).

Accident scenario; scenario

A sequence of events leading from an initiating event to a (major) accident, whose sequence and logical links are derived from the risk analysis. In general, several scenarios can lead to the same hazardous event, which can result in a (major) accident (definition...