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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
ISSUE: G DATE: 29.06.12
Tel: + 44 (0)1642 617444
PAGE 22 OF 34
Fax: + 44 (0)1642 616447
www.pidesign.co.uk5.2
Ship Import
Gasoline is imported from a ship in packages of up to 8,000 m
3
, although the ship could be
carrying more. The amount to be imported is transmitted to the site management and the
client’s surveyor. The management team check the receiving tank to confirm level in the
tank and ullage available. The import operation is carried out under operational procedures
with radio contact between the ship and the terminal operator. Any problems with the
operation are advised and the operation is stopped.
5.3
LOPA Review
5.3.1 Enabling Events Gasoline Import
Grade of Product
Super Unleaded
Premium UL
Gasoline
Gasoline
Number of Import Operations per year
6
12
Average quantity transferred
2267m
3
8000m
3
Number of Tanks
1
2
Maximum flowrate
250Te/hr
250Te/hr
333.3 m
3
/hr
333.3 m
3
/hr
Total time transfer occurs
40.8 hrs/yr
288 hrs/yr
Time transferring to 1 tank
40.8 hrs/yr
144 hrs/yr
Fraction of year transferring to a tank
(40.8/8760)
(144/8760)
= 0.0047
= 0.0164
Fraction of year transferring any individual tank
(0
.0047 + 0.0164) = 0.0211