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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 3 OF 34
Fax: + 44 (0)1642 616447
www.pidesign.co.uk1
REVISION HISTORY
Rev Description
A
Original Issue
B
Revised following Client meeting 16/02/07
C
Actual SIL 2 IPL Data added
D
Environmental and Financial Scenarios added
E
Total LOPA rewrite following decision to store gasoline on the Immingham East
terminal and incorporating PSLG guidelines and C.A. comments on other Simon
Storage terminals.
F
Clients comments incorporated with various Typographical error corrections and
units added.
Page 4 - Simon Competence statements added
Section 3 modified
Section 4 modified
Page 13 - Individual risk modified as per client comments
Section 5.1.1 modified as per client comments
Section 5.1.2 modified as per client comments
Section 5.3.2 modified as per client comment
Section 5.3.8 modified as per client comment
G
Following FSA Stage 3
Section 2.2 Modified: “A mid-range SIL2 protection layer which would close
individual tank-side pipeline fail-safe actuated valves on initiation of that tank’s
high high level switch.”
Section 4.1 Modified: “It was considered that the number of people on-site should
be stated as typically up to 20-30 during the day.”
Section 4.1.3 Modified: “No tertiary containment is available. In the LOPA no
credit has been taken for the Environmental case, Scenario 3.”
Section 5.1.2 Modified: … the jetty line actuated import lines will not close on
activation the fire alarm. However, the actuated tank import valves will close.
(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)
Section 5.3.3 paragraph added: It is considered that this Protection Layer can be
used for all initiating events as all of the gasoline tanks are protected by individual
tank-side valves that will close on activation of the level switch on that particular
tank. Within the scope of this LOPA, a gross misrouting of gasoline into any other
tanks on the terminal has not been considered.”