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Local Fuel – Shoreham Oil Terminal
Gasoline Ship Import – Layers of Protection Analysis
P & I Design Ltd
DOCUMENT NO: LF364002_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: E DATE: 30.07.15
Tel: + 44 (0)1642 617444
PAGE 8 OF 38
Fax: + 44 (0)1642 616447
www.pidesign.co.uk2.3
Definitions and Abbreviations
The following details the definitions and abbreviations used in this document.
ATG
Automatic Tank Gauging
BPCS
Basic Process Control System
BS EN 61511
British Standard – Functional Safety – Safety Instrumented systems for
the process industry sector
CM
Conditional Modifiers
IEF
Initiating Event Frequency
IPL
Independent Protection Layer
LOPA
Layer of Protection Analysis
MOV
Motor operated valve
OFCE
Open Flammable Cloud Explosion
OPRT
Overfill Protection Regulatory Team
PFD
Probability of Failing on Demand
PL
Protection Layer
SCADA
Supervisory Control & Data Acquisition
SIF
Safety Instrumented Function
SIL
Safety integrity level – A numerical number, 1 to 4 stipulating the level
of integrity the system shall perform to, 1 being the lowest 4 the highest
SIS
Safety Instrument System – A SIS comprises of sensors, logic solvers
and final elements
ROSOV
Remotely Operated Shut-Off Valve