LF364002_RPT_E - Brighton LOPA Review

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Local Fuel UK Ltd – 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
Tel: + 44 (0)1642 617444
Fax: + 44 (0)1642 616447
Appendix 2
EPC Modifier APOA
Assessed
Affect
EPC Modifier APOA
Assessed
Affect
EPC Modifier APOA
Assessed
Affect
F 0.003 31 1.2 0.8 1.16 33 1.15 0.5 1.075 n/a n/a n/a 3.74E-03
Incorrect Routing. The
operator line-up to
selected tank and
walks the selected
route.
Restore or shift a
system to original
or new state
following
procedures with
some checking
Low
Workforce
Moral
High Affect
taken for
terminal
personnel
A poor or
hostile
environment
(below 75%
of health or
life
threatening
severity
Moderate
affect taken
for poor
weather
conditions
E 0.02 31 1.2 0.8 1.16 3 10 0.2 2.8 n/a n/a n/a 6.50E-02
Operator Cross Check
Routine, highly
practiced, rapid
task involving
relatively low level
of skill
Low
Workforce
Moral
High Affect
taken for
terminal
personnel
and due to
generic
task
selected
A low signal
to noise
ratio
Low affect
due to type
of
operation.
G 0.0004 31 1.2 0.8 1.16 33 1.15 0.5 1.075 3 10 0.5 5.5 2.74E-03
Incorrect Dip. - The
operator and surveyor
dip the tank together.
They prepare for the dip
by applying paste to the
weight to show level of
water in tank (if any).
They also apply paste
to the area of the dip
where they are
expecting to see the
gasoline level in the
tank. The operation is
routine and carried out
regularly.
Completely
familiar, well
designed, highly
practiced, routine
task occurring
several times per
hour, performed to
highest possible
standards by
highly motivated,
highly-trained and
experienced
person, totally
aware of
implications of
failure, with time to
correcr potential
error, but without
the benefit of
significant job aids.
Low
Workforce
Moral
High Affect
taken for
terminal
personnel
and due to
generic
task
selected
A poor or
hostile
environment
(below 75%
of health or
life
threatening
severity
Moderate
affect taken
for poor
weather
conditions
A low signal
to noise
ratio
Moderate
affect due
to operation
being
carried out
on top of
tank in
possible
poor light
conditions.
Manual Task
EPC 1 EPC 2 Proposed
Nominal
Human
Unreliablilty
Generic Task Type
selected
HEART ASSESSMENT
EPC 3
Resultant
Error
Probability