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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 26 OF 38
Fax: + 44 (0)1642 616447
www.pidesign.co.ukScenarios 2, 3 & 4
Initiating Event 1
Cause
Description
Notes
No of
events/year
1
Whilst importing
from a ship,
overfill of
Gasoline Tank
due to incorrect
line up.
Operator lines up to an incorrect tank.
There are 10 Imports per year.
(Consideration should be given to incorrect
product introduced by incorrect lineup)
Probability of incorrect line-up: 3.74 x 10
-3
based on HEART Data. (See Appendix 2)
Probability based on historical site date,
for operator making routing error over 5
years Nil (Conservative Total Frequency
using HEART: 10 x .00374 /yr)
0.0374
AND I.E. Modifier 1
Cross Check: Operator attends selected
tank at start of import and confirms that,
whilst the transfer is at a low flowrate,
flow has started to the correct tank. The
start level is recorded on the bulk
movement sheet. (See Note Below)
Probability that operator fails to act on not
seeing a flow commence 0.065 based on
HEART Data. Probability based on
historical site date, for operator making
cross check error over 5 years Nil
Conservative probability assumed = 0.1
0.1
Overall Frequency of Initiating Event :
(0.0374) x (1 x 10
-1
)
= 3.74 x 10
-3
/year