Emergency Systems Survivability Analysis (ESSA)
The objective of the ESSA is to identify those systems that are essential for the preservation of human life following any major accidental event and necessary to maintain life support on the installation.
ESSA shall systematically assess the capability of the identified emergency systems to operate as intended during emergency conditions, i.e. fire, toxic gas release, explosion, etc. Findings of QRA and other safety studies, to be carried out as part of the present project scope, shall be utilized in the assessment.
The ESSA shall consider the following systems, as minimum, as part of present scope:
- Emergency Shutdown Systems
- Emergency depressurisation systems
- Fire and gas detection systems
- Platform Alarms
- Active Fire protection systems and Equipments
- Vent Fire Snuffing Equipment
- Passive Fire Protection System
- Egress to sea and Life Saving Appliances (LSAs)
- UPS and Emergency power
- NavAids and Communication
- Signs and lighting
The ESSA shall aim to demonstrate that the emergency systems identified above will function following all identified major accidental events, and that all reasonable design features have been incorporated to meet this need as far as is practicable. The vulnerability and survivability of the identified systems following an accident event shall also be assessed.
The overall approach to the ESSA is summarised as follows:
- Develop a definition for Safety Critical (i.e. emergency) systems
- Identify all Major Accident Hazard (MAH) events and their ability to impair the identified safety systems required during an emergency
- Identify all emergency systems (according to the above definition of safety criticality) presently in operation on the platform, their function, constituent parts and locations
- For each MAH, determine which emergency systems are required for prevention of that accident and which systems are required to prevent escalation
- Determine the vulnerability of each of the emergency systems in the accident events they are designed to mitigate
- Determine the redundancy or duplication of emergency system components or alternative systems
- Complete the emergency systems assessment in the light of the above analysis
Emergency Systems Survivability Analysis (ESSA)
The objective of the ESSA is to identify those systems that are essential for the preservation of human life following any major accidental event and necessary to maintain life support on the installation.
ESSA shall systematically assess the capability of the identified emergency systems to operate as intended during emergency conditions, i.e. fire, toxic gas release, explosion, etc. Findings of QRA and other safety studies, to be carried out as part of the present project scope, shall be utilized in the assessment.
The ESSA shall consider the following systems, as minimum, as part of present scope:
- Emergency Shutdown Systems
- Emergency depressurisation systems
- Fire and gas detection systems
- Platform Alarms
- Active Fire protection systems and Equipments
- Vent Fire Snuffing Equipment
- Passive Fire Protection System
- Egress to sea and Life Saving Appliances (LSAs)
- UPS and Emergency power
- NavAids and Communication
- Signs and lighting
The ESSA shall aim to demonstrate that the emergency systems identified above will function following all identified major accidental events, and that all reasonable design features have been incorporated to meet this need as far as is practicable. The vulnerability and survivability of the identified systems following an accident event shall also be assessed.
The overall approach to the ESSA is summarised as follows:
- Develop a definition for Safety Critical (i.e. emergency) systems
- Identify all Major Accident Hazard (MAH) events and their ability to impair the identified safety systems required during an emergency
- Identify all emergency systems (according to the above definition of safety criticality) presently in operation on the platform, their function, constituent parts and locations
- For each MAH, determine which emergency systems are required for prevention of that accident and which systems are required to prevent escalation
- Determine the vulnerability of each of the emergency systems in the accident events they are designed to mitigate
- Determine the redundancy or duplication of emergency system components or alternative systems
- Complete the emergency systems assessment in the light of the above analysis