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Simon Storage Ltd – Immingham East Terminal
Gasoline Import – Layers of Protection Analysis
P & I Design Ltd
DOCUMENT NO: SI057001_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
Tel: + 44 (0)1642 617444
Fax: + 44 (0)1642 616447
www.pidesign.co.ukAppendix 3
Operator Reliability
Simon Storage Operator Reliability Survey
Historical critical error data
Errors during routine operations
Seal
Sands
ISCO
West
ISCO
East
Tyne Riverside TOTAL
N
o.
ship imports in last 10 years
3840 8185 1956 1110
853
15944
N
o.
pipeline imports (from external sites) in last 10
years
10920 12025 1119 1070 3804
28938
N
o.
tank-to-tank transfers in last 10 years
3650 5365 1874 2349 1255
14493
Errors during emergency response
Seal
Sands
ISCO
West
ISCO
East
Tyne Riverside TOTAL
As a result of operator error during imports/tank
transfers:
N
o.
release events (from pipelines/hoses)
0
3
3
0
0
6
N
o.
times product sent to wrong tank
1
0
0
1
5
7
N
o.
tank overfill events (HLA went off)
2
1
1
1
0
5
N
o.
tank over-top events (product release)
0
1
0
0
0
1
N
o.
failures to respond correctly when:
1
1
HISTORICAL DATA (1998 - 2008)
Error
probability
(based on
historical
data)
HISTORICAL DATA (1998 - 2008)
Error
probability
(based on
historical
data)
8
1.35E-04
1
1
4
6.74E-05
Error
: N
o.
imports/tank transfers in which operator
failed to rig up transfer line correctly
1
2
3
Error:
N
o.
transfers in which supervisor/2
nd
operator
failed to identify operator’s error (inadequate check
or check not carried out).
Includes failures to check
all aspects of the system set-up, not just rigging of
transfer line)
0
2
0
Error:
Product was released
0
0
0
Error:
HLA was activated
0
0
1
*Note - very
small data set
makes
following
figures
unreliable
0
0
1
5.26E-02
0
0
0
0.00E+00