LF364002_RPT_E - Brighton LOPA Review

Local Fuel – Shoreham Oil Terminal

Gasoline Ship Import – Layers of Protection Analysis

P & I Design Ltd

DOCUMENT NO: LF364002_RPT

2 Reed Street, Thornaby, UK, TS17 7AF

ISSUE: E DATE: 30.07.15

Tel: + 44 (0)1642 617444

PAGE 22 OF 38

Fax: + 44 (0)1642 616447

5.3.2

Initiating Event Likelihood (Ref. PSLG Guidelines, Appendix 2, Clauses 55-57)

Initiating events were determined using a demand tree. The meeting considered a number

of events that could lead to the scenario considered and the following events were detailed.

Overfill of tank

Three of the initiating events were identified as the controlling factors in a possible

overfill:

Incorrect Routing on import

Incorrect Ullage in receipt tank. (Not enough ullage to take full import quantity)

Failure of ATG (Sticks or reads low)

Initiating events 4 & 5 were not considered as credible and the frequency of the event in

I.E. 6 was considered so low as to be negligible.

Failure of ATG

whilst filling

(I.E. 3)

Incorrect

Routing on

import (I.E. 1)

Incorrect

Ullage in

receipt tank

(I.E. 2)

Valve failure

(or passing)

(I.E. 4)

Changes in

filling rate (I.E.

Failure of ship

operator to terminate

import (I.E. 6)