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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
ISSUE: C DATE: 13.05.16
Tel: + 44 (0)1642 617444
PAGE 21 OF 23
Fax: + 44 (0)1642 616447
www.pidesign.co.ukP & I Design Ltd
PFD - Logic Solver Subsystem Calculation Sheet 1
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
3
3
2
PFD Value Certified
PFD Value Certified
Safety Relay
2.13E-05
PFD Value
3.50E-08
0.99
SFF ( 0 to 1.0 )
0.90
80
Diagnostic Coverage (%)
84.00
2.76E-07
2.50E-08
1.95E-06
1.30E-10
0.99
0.90
2.92E-08
5.79E-11
80.00
84.00
SUB-SYSTEM DATA
24
365
0.0
100
25.0
2.92E-08
2.43E-08
4.86E-09
0
n/a
n/a
n/a
2.20E-05
2.13E-05
Valid
59
A
YES
Diagnostic Coverage (%)
Pilz PNOZ S2
LF364
Local Fuel
Shoreham Terminal
LF364101_CAL
LFS-SIS1
System Architecture
Sub System Item
FAILURE DATA
PFD Value From Certificate
Safe split fraction ( 0 to 1.0 )
Proof Test Interval (days)
FAILURE CALCULATIONS
Total Failures (λ)
Safe Fail Fraction
Total Dangerous Failures (λ
D
)
Calculated Diagnostic Coverage (%)
Mean Time to Repair (hrs)
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
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