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Local Fuel – The Shoreham Oil Terminal
Gasoline Import - Safety Instrument System
P & I Design Ltd
DOCUMENT NO: LF364006_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
Tel: + 44 (0)1642 617444
Fax: + 44 (0)1642 616447
www.pidesign.co.ukP & I Design Ltd
PFD - Final Element Subsystem Calculation Sheet 2
www.pidesign.co.ukSheet Title:-
Version 5.8
Project:
Originator:
DSR
Client:
Checked:
DBF
Client Ref:
Approved:
DSR
Document:
Issue:
B
SIS Number:
Date:
09.05.16
Key:
Data Input Cell
Calculation Cell
Results Cell
Element 1
Element 2
Data Type
Data Type
2
3
2
Failure Rate/hr (λ)
PFD Value Certified
Ball Valve
Actuator
0.00E+00
PFD Value
5.00E-07
1.65E-06
SFF ( 0 to 1.0 )
0.90
2.92E-07
Diagnostic Coverage (%)
90
3.34E-07
8.54E-09
2.28E-06
2.28E-09
0.85
0.90
6.26E-07
1.26E-09
46.65
90.00
SUB-SYSTEM DATA
24
365
0.0
100
25.0
6.26E-07
2.92E-07
3.34E-07
0
2360.9
n/a
46.6
1.48E-03
1.46E-03
Valid
59
A
YES
Fault Tolerance Check (BS61508 - 2:2010) has been met?
PFD Total (Perfect Testing)
PFD Total (Imperfect Testing)
SIL achieved (Including Fault Tolerance)
Spurious Trip Rate (years)
FAULT TOLERANCE CHECK
Device Type
LOOP CRITERIA ACHIEVED
Percent of detected failures that have common cause (βD)
Proof Test Coverage (C
PT) -
%
Operational Lifetime of SIF (LT) - years
CALCULATED DATA
Total System Dangerous Failure (λ
D(group)
)
Total System Dangerous Detected Failure (λ
DD(group)
)
Total System Dangerous Undetected Failure (λ
DU(group)
)
Fraction of undetected failures that have a common cause (β)
Channel Downtime (t
CE
)
Voted Group Downtime (t
GE
)
Mean Diagnostic Coverage
Proof Test Interval (days)
Failures - Dangerous, Undetected (λDU)
FAILURE CALCULATIONS
Total Failures (λ)
Safe Fail Fraction
Total Dangerous Failures (λ
D
)
Calculated Diagnostic Coverage (%)
Mean Time to Repair (hrs)
Failures - Dangerous, Detected (λDD)
Pekos Floating Ball Valve
LF364
Local Fuel
Shoreham Terminal
LF364101_CAL
LFS-SIS1
System Architecture
Sub System Item
FAILURE DATA
Failures - Safe, Detected (λSD)
Failures - Safe, Undetected (λSU)