Safety Critical Element Management Manual

SCE group PS015SCE group title

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Shell EP 2009.9009 SCE Management Manual
POSITION PAPER 130[shell verification]

SCE group PS015
SCE group title Collision Avoidance Systems
Radar system to detect marine traffic on a potential collision course with the installation for movement monitoring,
assessment and warning.
To avoid ship collision bypassing or drifting vessels with the installation Fixed radar system on installation offshore Facility Radar systems installed on the offshore standby vessels
At system level
SCE group SD001
SCE group title Emergency Shutdown System
ESD System to take action during an incident to safely shutdown the process.
To achieve safe shutdown, of plant and equipment, to prevent or mitigate the consequences of the release of a Major Hazard Anemometers for wind speed and direction Meteorological sensors for air temperature, air humidity, atmospheric pressure, cloud height and visibility Wave sensors and current speed and direction sensors
At system level
SCE group PS016
SCE group title Metocean Data Gathering Systems
To provide continuous,
accurate, real-time meteorological and oceanographic (Metocean)
data for use in aviation and marine logistics and other offshore operations that maybe affected by adverse weather.
To alert personnel to adverse weather by providing accurate,
continuous, real-time metocean data for decision making when conducting weather sensitive activities to help prevent weather related incidents.
At system level

Safety Critical Element Management Manual
EP 2009-9009
Restricted
46
SCE group listing (continued)
SCE goal
Typical equipment types
Description
Minimum level
SCE group SD002
SCE group title Depressurisation System
Depressurisation System includes all valves for emergency depressurisation of flammable or harmful inventories.
To prevent major escalation during afire incident by
• preventing the rupture of process equipment or pipework which may suffer a decrease in mechanical strength due to the exposure or impact from an external source of heat or fire ensuring a rapid reduction in the size of any hydrocarbon inventor Blowdown valves Pneumatic/hydraulic actuators and local control circuits Any rate-determining elements (e.g. orifice plates) that are essential for the system to achieve its performance requirements
At system level

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