28 / 69
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 28 OF 34
Fax: + 44 (0)1642 616447
www.pidesign.co.ukOther causes not assessed in detail as their contribution is significantly lower than causes 1
through 3.
Cause
Description
Notes
4
Valve failure (or
passing) on a route
where import is not
expected.
All routes have at least two isolation valves with
automated tank inlet valves. Probability of this failure
leading to an overfill is very low compared to other
initiating events.
6
Changes in the filling
rate due to changing
operations on other
tanks.
Not considered as an issue, as only one tank is filled at a
time. The maximum quoted rate for a ship import is
250te/hr (333m
3
/hr)
7
Failure to terminate
filling at the ship on
request from terminal
The ship operators and ISCo operations are monitoring
the transfer and will normally stop at the required parcel
quantity. Contact is made with the ship operations to
warn that the tank is reaching its required quantity. The
ship is highly unlikely to export more than the
contracted quantity.