Emergency System Survivability Analysis ( ESSA)
The objective of the ESSA is to verify/validate the design of the primary containment components (tanks, vessels, heat exchangers, equipment piping and pipelines) can survive the severe consequences that might be expected during a Major Accident Event (MAE), and which would constitute significant escalation. Their survivability needs to be supported/improved by the presence of other Emergency Systems, such as Passive Fire Protection, ESD, Blowdown/Relief Systems, Fire Suppression Systems, etc. that ensures that the potential for further loss of containment during a MAE is minimised for sufficient time to assure that personnel can safety escape and/or evacuate. In case that survivability criteria for any from assessed Emergency Systems are not met the recommendation shall be raised to improve such system response to MAE conditions.
Key features
- Identify the Major Accident Hazards\Events (MAH\MAE) associated with the hazardous facility
- Summarise the Safety Critical Elements (SCE) whose correct functioning is essential for the control and mitigation of the consequences of an emergency (Emergency Systems)
- Assess the vulnerability of these selected Emergency Systems to all Major Accident Events associated with the facility
- Verify whether the assessed Emergency System is configured to ‘fail safe’ in the event of a MAE
- Verify whether is there any redundancy (duplication of components) within the assessed Emergency System or alternative systems that are available and remain unimpaired by the MAE.
- Outline the survivability requirements, to ensure that the Emergency System remains effective for as long as it is required to fulfil its function
- Recommend corrective actions in cases where the required Emergency System survivability is not fully proven
Benefits
- Enhanced Safety: By thoroughly analysing emergency systems, ESSA helps identify vulnerabilities and improve overall safety for personnel and assets
- Regulatory Compliance: Many industries have strict regulations regarding emergency preparedness. ESSA helps organizations meet or exceed these requirements
- Risk Reduction: Through systematic analysis, ESSA helps minimize the risk of catastrophic failures during emergencies.
- Cost Efficiency: While implementing ESSA may require upfront investment, it can lead to long-term cost savings by preventing costly accidents or system failures
- Improved System Design: Insights from ESSA can inform better design choices for future systems or upgrades to existing ones
- Increased Reliability: By identifying potential failure modes, ESSA contributes to improving the overall reliability of emergency systems.
- Better Emergency Preparedness: ESSA helps organizations develop more effective emergency response plans based on a thorough understanding of their systems' capabilities and limitations
- Confidence in Critical Operations: For industries dealing with high-risk operations, ESSA provides greater confidence in the ability to handle emergencies