Major Accident Hazard Assessment
Major Accident Hazard (MAH) assessment focuses on the identification, analysis, and control of events that have the potential to cause severe consequences beyond the plant boundary, including multiple fatalities, environmental damage, and large-scale asset loss.
Overview and Objectives of Major Accident Hazard (MAH) Assessment
Major Accident Hazard (MAH) Assessment focuses on identifying, analyzing, and controlling events that could result in severe consequences beyond the plant boundary, including multiple fatalities, significant environmental damage, and large-scale asset loss.
MAH studies are typically required for high-hazard facilities such as refineries, petrochemical plants, and chemical processing units where large inventories of hazardous materials present substantial off-site risk.
The primary objective of an MAH assessment is to demonstrate that:
- Major accident scenarios have been systematically identified
- Effective prevention and mitigation measures are in place
- The likelihood and consequences of catastrophic events are reduced to tolerable levels
- Regulatory and corporate safety requirements are satisfied
Key Components of an MAH Assessment
A comprehensive MAH assessment generally includes:
Identification of credible major accident scenarios
Evaluation of preventive and mitigative safety barriers
Integration of findings from HAZOP, LOPA, and QRA studies
Emergency response planning and escalation analysis
Demonstration of risk tolerability and regulatory compliance
This structured approach ensures that facilities managing hazardous materials maintain robust controls to prevent catastrophic incidents and protect people, the environment, and assets.