Section
3 Qualitative failure analysis for propulsion, steering and essential
services
3.1 General
3.1.1 A qualitative
risk based failure analysis is to be conducted in accordance with
this Section to assess compliance with the analysis objectives.
3.1.2 The
analysis is to assess the magnitude and consequences of various types
of potential hazards in the design that might lead to failure to fulfil
the analysis objective(s) stated in Pt 5, Ch 23, 3.2 Analysis objectives.
The following are to be considered during the analysis:
-
analysis facilitation;
-
these Rules;
-
relevant statutory
regulations and National Administration criteria;
-
the ship design;
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the intended
ship operation; and
-
the relevant
machinery, equipment and systems.
3.1.3 Those
conducting the analysis and their roles are to be recorded in the
analysis report.
3.1.5 The
analysis is to be documented, see
Pt 5, Ch 23, 1.4 Plans and information 1.4.2, and two reports are to be
submitted:
-
a preliminary
analysis, after the initial arrangements of different compartments
and propulsion and steering arrangements are known, to permit an assessment
of compliance with this Section. This is to include an assessment
of propulsion and steering capability in the event of a failure, fire
or flooding in any compartment casualty; and then
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a final report
on the design, documenting compliance with this Section, that includes
a detailed assessment of machinery and equipment required to provide
propulsion and steering safely and effectively in accordance with
the applicable requirements of Pt 5, Ch 23, 2.1 General 2.1.2.
3.2 Analysis objectives
3.2.1 For
passenger ships having a length of 120 m or more, or having 3 or more
main vertical zones, the analysis is to:
-
assess, identify
and record the effects of failure in propulsion and steering equipment
and systems after a fire casualty or flooding as described in Pt 5, Ch 23, 2.1 General 2.1.1 and Pt 5, Ch 23, 2.1 General 2.1.1.(b); and
-
verify compliance
with Pt 5, Ch 23, 2.1 General 2.1.2) and Pt 5, Ch 23, 2.1 General 2.1.2.(b).
3.2.2 For
other passenger ships, the analysis is to assess, identify and record
the effects of failure in propulsion and steering equipment in any
space.
3.3 Analysis scope
3.3.1 The
analysis is to consider the propulsion and steering machinery, equipment
and other associated systems and equipment which might impair the
availability of propulsion and steering.
3.3.2 To
consider the effects of fire or flooding, the analysis is to address
the installed locations of relevant equipment and systems.
3.3.3 The
analysis is to include assessment of potential common cause failures
and consequential failures when analysing system redundancy intended
to maintain propulsion and/or steering in the event of a failure.
3.3.4 Where
the analysis scope is extended to additionally consider other services
and verify additional compliance with the requirements of Pt 5, Ch 23, 2 Safe return to port and/or Pt 5, Ch 23, 4 Orderly evacuation and abandonment after a casualty, details may be submitted, see
Pt 5, Ch 23, 1.4 Plans and information 1.4.3 and Pt 5, Ch 23, 1.4 Plans and information 1.4.4.
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