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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 21 OF 34
Fax: + 44 (0)1642 616447
www.pidesign.co.ukleak tests the hose and restarts the import to the new tank. The operator attends the tank as
before to confirm that the import starts.
At the end of the import, the ship will stop automatically having completed the export of its
cargo. There will be contact between the tank-side, jetty operator and the ship to confirm the
completion of the import. Once the import is complete the ship will stop its pumps and
isolate the ships manifold. The jetty hose will be cleared of product into the import line and
isolated. The hoses will then be disconnected. The jetty line to the hose-pit will then be
pigged clear. There is a maximum amount of 50 m
3
that will be sent to the tank during this
operation.
No tank to tank transfers are routinely carried out. If a tank is to be taken out of service then
any transfer is carried out under management procedures.
ATG Alarms via VTW System
Topping Off Alert (Facility available, set 60 minutes from predicted finish time)
Normal Fill Level Alert (Set at 95% at present)
High Level Alarm (Set at 96% at present)
The normal fill level alert and high alarms are purely audible alarms within the control room
and transmitted through the radio system.
Other alarms
There is an independent high high level switch and shutdown system which closes the
Automated Shutdown valve on the receiving tank inlet. The activation of the switch is
transmitted to a control room annunciator and repeated to the radio system. (Set at 97% at
present)
(For tank 561 = 6931mm, time to overfill after high high level activated: 5.4 minutes)
(For tank 564 = 8662mm, time to overfill after high high level activated: 9.9 minutes)
(For tank 568 = 8662mm, time to overfill after high high level activated: 9.9 minutes)
Power Failure
In the event of a site wide power failure the terminal operator will contact the jetty to stop
transfer.
The VTW, annunciator and radio base station are powered by a UPS. Level monitoring on
tanks will fail. The high high level switches will activate and the shutdown valves will close.