(33m) Risk Warning in Real Time Based on HIRA Studies

A HIRA (Hazard Identification Risk Analysis) study, using the bow-tie methodology, allowed the identification of the major risks of an oil refinery. Maintaining risks at acceptable levels depends on the integrity of the established barriers - including IPLs, i.e., the degradation or unavailability of a barrier can lead to the existence of unacceptable scenarios, classified according to the risk matrix (severity x frequency).
Monitoring the integrity level of the barriers implemented in major risk scenarios allows rapid actions to be taken - repair or mitigation, to ensure acceptable risk levels: for this purpose, a system was implemented that provides a dynamic interface capable of showing the relationship between initiating events, potential consequences and existing barriers, calculating according to their degradation/availability the risk levels that can be classified as tolerable, ALARP and unacceptable.