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Immingham Storage Co Ltd - East Terminal
Gasoline Storage Tanks Overfill Safety Instrument System - Functional Safety Assessment Stage 2/3
P & I Design Ltd
DOCUMENT NO: SI277016_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
ISSUE: D DATE: 25.04.13
Tel: + 44 (0)1642 617444
PAGE 14 OF 33
Fax: + 44 (0)1642 616447
www.pidesign.co.ukThe SRS contains a description of the SIS process output actions and criteria for successful
operation.
The SRS contains a description of the functional relationships between process inputs and
outputs.
The SRS contains a description of the requirements to de-energise to trip
The SRS contains a description of the requirements for reset after a shutdown.
The SRS contains a comment that the allowable spurious trip rate will be approved by
Immingham Storage Company East after the spurious trip calculations are complete
The SRS contains the failure modes and desired response of the SIS
The SRS contains a description of the requirements for reset after a shutdown. There are no
specific requirements for start-up and shutdown of the SIS.
The SRS contains details of interfaces between the SIS and the BPCS
There is only a single mode of operation of the plant and the SRS reflects this.