SILSuite™ | SILClass™ | SILLopa™ | SILHazop™ | SILCalc™ | SILAlarm™ | SILLife™
Layers
of protection analysis tool for:
• Interfacing directly
with HAZOP results
• Achieving on site safety,
societal, asset and environmental risk targets
• Determining the required integrity
level of SIFs
• Single pass assessment to
capture:
– On site safety consequences
– Societal consequences
– Asset loss
– Environmental consequences
• Setting the required target PFD for a
SIF
• Developing optimal SIF designs
• Optimising test and maintenance routines
This application
has been independently third party validated.
The
SILLopa™ ‘front end’ application contains
the following functionality:
Direct import of HAZOP findings from SILHazop™ and bulk import and export
SIF data using spreadsheets.
To undertake
SIL determination using
Layers of Protection Analysis (LOPA)
for a choice of on site safety, economic, environmental and
societal consequences against definable severity targets (up
to five) for each category. Provision for segregating the contribution
made for protective layers and additional mitigation which
is specific to on site safety, societal, environmental and
asset loss.
The ability
to capture the assessment team details for each function along
with actions that are raised. Actions can be emailed directly
from a meeting, if required, and responses managed to aid close
out.
Calculated
target PFD, the SIL band and the type of requirement driver
from an on site safety, societal, environmental or asset loss
perspective.
Optimisation
of the components/elements, selected in the design architecture
for the protective function, with M out of N calculation capability
for initiators, logic solvers and final elements, and calculation
of the Probability of Failure on Demand (PFD) and optimal test/maintenance
regime for the chosen design.
Determine
the ‘beta’ factor for Common Cause/Common Mode
failures and calculate the Safe Failure Fraction and Hardware
Fault Tolerance of elements.
The
independent ‘back end’ database can contain
the following specific data:
• Multiple system creation
• P&ID and Cause & Effect
references
• Multiple database creation
• Equipment/maintenance codes
• Plant lines and Nodes
• The design architecture
for each SIF
• Process deviation analysis
• Safe failure fraction records
• Fluids and Process Data
• Hardware fault tolerance
records
• LOPA worksheets
• The maintenance and testing
data
• PFD and SIL requirements
• Details of pre-alarm settings
• Reliability data for elements
• Comprehensive reporting
facilities
• The SIF configuration/data
• Spreadsheet import and export
facility
The
following three access levels are provided:
1. Administrator
to add users and allocate their passwords.
2. Individual
user level for specified databases to which user access is
granted with full editing capability of any functionality.
3. Read
only access for viewing data and running reports.
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