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Safety Instrument System
Tank Overfill Protection - Management of Functional Safety
P & I Design Ltd
DOCUMENT NO: SI277102_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: B DATE:10.10.12
Tel: + 44 (0)1642 617444
PAGE 7 OF 22
Fax: + 44 (0)1642 616447
www.pidesign.co.uk7.0
RISK ANALYSIS AND ALLOCATION OF SAFETY FUNCTIONS
Layer of Protection Analysis (LOPA) was used as a technique to establish the initiating
events, and protection layers to establish if further risk reduction was required.
Roles and Responsibilities:
Immingham Storage Ltd:
Agree Scope of LOPA
Provide LOPA team of competent persons in accordance with Management Procedures
Personnel assigned to this phase:
Meeting 1 – 31.01.2007 June 2010 – Tank Overfill Protection LOPA
Immingham Storage Ltd.
Mr C. Newstead
Allan Hall
Paul Jobling
Andy Drayton
P&I Design Ltd:
D.R.Ransome – Consultant
D. S. Regan – Facilitator and Secretary
Roles and Responsibilities:
P&I Design Ltd:
Agree Scope of LOPA
Provide personnel to facilitate and record LOPA study, allocate Safety Functions to SIS (or
other Means of Risk Reduction) and produce report.
The LOPA review Document will be updated to reflect the final SIS calculated figure
Personnel assigned to this phase:
D. S. Regan
D. R. Ransome
LOPA Document Reference – SI057001_.RPT
Note: The LOPA Document is currently at Issue D 08.07.2010. Issue D included an
Environmental Statement. It should be noted that this LOPA was not conducted against PSLG
guidelines, and was not updated in accordance with these guidelines, as the facility, at
present, does not have a gasoline facility.