SSWP6 General Vision

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S_at_S-WP6- General Vision

• A.Fulfaro
• Paris Workshop 14\03\03

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-General objectives of the Presentation

• To give evidence of the FIN Safety methodological
  approach
• To correlate it with the aim of the project
• To underline the objectives of the applicative
  tool developed in the project
• To evaluate the input\output data expected in
  terms of cost and alternative design solutions
• using the tool (impact on breakdown structure)

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Safety FIN methodological approach

• To apply the As low as Reasonably practicable
  Principle
• To comply with national Health and safety
  legislation
• To make appropriate use of standards or when such
  standards
• do not exist then an acceptable cost effective
  standards is to be
• contrived reducing safety risk
• To apply a safety management system to ensure
  that health
• and safety hazards are identified, assessed and
  controlled

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Safety case       
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Main relevant Hazards

• 1. Loss of the propulsion
• 2.      Loss of electrical production
• 3.      Loss of the HVAC system
• 4.      Hardware/software
• 5.      Explosion of a pressure capacity
• 6.      Loss of integrity of under pressure pipes
  and/or pipes carrying hazardous substances
• 7.    Fire/smoke
• 8.      Risks associated with seamanship
  activities
• 9.  Risks of crews intoxication
• 10.  Risks concerning machines containing rolling
  equipment
• 11.  Risks related to electrical or energy
  discharges
• 12.  Risks related to materials
• 13.  Collision
• 14.  Flooding
• 15.  Relevant environmental effects
• 16.  Abandoning of ship.

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Safety Case Output Design measure proposition
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Safety Case Output 2 Mitigation measures\Impact
on design
Hazard
Top event
Most Likely causes
Potential Consequences
Risk Evaluation
Laws and Reg. applicable to mitigate risk
Risk control Measures
Residual risk
Mitigation measures Impact on Design
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Relevant Mitigation Measures

• When necessary, reduction measures were
  identified during the PHA process. However, it
  could be necessary to achieve a trade-off between
  solutions to analyse the expected effectiveness
  of each alternatives. Mishap risk mitigation is
  an iterative process that culminates when a
  residual risk has been reduced to a level
  acceptable to the appropriate authority.
•  
• Two major reduction axes are available 
•  
•       Reduction (elimination) of the hazardous
  condition occurrence (i.e. improvement of the
  failure tolerance whenever possible),
•       Implementation of protective devices to
  reduce (eliminate) associated consequences.
•  
• Among the Safety solutions usually proposed as
  mitigation measures one or more of  the following
  could be selected
•  
•       design hazards out
•       incorporate safety devices
•       provide warning devices
•       develop procedures and training
•  
• In order to complete the process, in some cases a
  verification of the mitigation measure through
  appropriate analysis, testing or inspection may
  be required to confirm the acceptability of the
  residual risk.

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Impact on Cost

• One critical point in the previous process
• is to evaluate the real impact on Cost
• One Scope of S_at_S project
• Development and application of a formalised
  safety methodology for design for safety of HSC
  taking into account the impact on costs
• seems to consider as relevant this aspect

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S_at_SIntegrated Tool
Tool relationship between risk and cost with a
well defined model For risk, functions and topics
adressed
WP1 Risk of Collision and grounding (risk)
To Navigate Safety of high speed (function)
Human factor\Level of automation\Manoeuvrability\E
nvironmental Condition (topics)
WP2Ship Motion risk Model for ship
motion (Function)
HF\Foundering\Structure ( Topics)
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S_at_SIntegrated Tool (2)
WP3 Foundering Structural Integrity of
the Hull girder Material properties\Structura
l strenght\building and repair cost
WP4 Containment of Damage and Fire
Safety and security of the ship
Structural insulation\Active\passive firefighting
system fire zone partition
WP5 Integration of the methodology and
validation with the current laws and
regulation
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S_at_SIntegrated Tool (3)
WP5
The system under study was a generic HSC
subdivited into 8 systems Crew General
arrengement Hull form Payload Safety
system Structure Operation Machinery
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Using the Tool
The Tool will be applied at different levels of
Design (see next Slide)in order to give the
right assessment of the critical risk parameters
evaluating their impact on the breakdown
structure at eight level as proposed in the WP5
(see for example Hull in the next slides) The
design will be modified in accordance with the
calculated level of risk and with the possible
alternative solution which could be applied on
board (the modification will involve the relavant
part of the breakdown structureHull or Machinery
for example ) A cost evaluation will guide the
final decision The goal is to optimize the Design
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Design Methodology Phases

• four phases summarised as follows
• 1.Preliminary Design
• 2.Basic Design
• 3.Functional design
• 4.Detailed Design

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1.Preliminary Design

• Phase of Feasability in which the main ship
  characteristics function of what is realizable
  are defined taking into account also the Owners
  request

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1.Key Parameters (KP)

• Loading Capacity
• Velocity
• Autonomy
• Than If there is a specific request
• High Comfort ( which could influence for example
  the level of Noise on board)

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1. MOP (Management of Performances)

• Alternative Design solutions are evaluated in
  order to define the optimal configuration

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2.Basic Design

• General project is defined with is own
  dimensional and functional characteristics
  such
• Dimensions of the Ship (KP.ship geometry)
• Preliminary General Displacement
  (KP.autonomy/speed linked to fuel on board)
• Oss Autonomy is connected with payload which is
  generally fixed .
• Preliminary General arrangment Plan (KP.
  Displacement linked to the systems
  architecture.The variables are ship dimension
  and number of deck)

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Basic Design 2

• Preliminary Arrangement (for Engine room for
  istance). (KP. speed (tempi di imbarco e sbarco)
  and safety (escape routes, life savings..)
• Preliminary layout drawings (for Propulsion
  system for istance). (K.P. architecture of
  systems (type of engine with its own technical
  characteristics)
• Midship section. (K.P. Cost, Type of material)

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Key factors

• Dimensions
• Velocity
• Power
• General Arrangement

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3.Functional design

• A more complete level of detail in which for
  example the general arrangment of Engine room
  contains all the systems described in detail (if
  we consider the cooling system the pumps with
  their loading capacity or the piping with their
  size are described for example)
• Structural drawings are ready for Register
  approval
• (during Basic Design only Midship section is
  ready for approval for istance)
• There are no informations about the real location
  of all the systems with their own components on
  board

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4.Detailed Design

• All the Drawings will be completed by evaluating
  the sequence of cutting and welding or the right
  piping design for example (Structural Drawings)
• the so called Coordinate Plans (Detailed
  Drawings of pipes,cables..) are completed in
  order to define the exact position on board of
  all the equipment and to evaluate (for istance)
  if there are space interference among systems,
  piping,equipment and so on

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MDV 1200 Table of Contents

• General
• Hull Structure
• Propulsion Plant
• Electric Plant
• Command and Surveillance
• Auxiliary Systems
• Outfit and Furnishing

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General

• Ships main characteristics are described like
  dimensions, number of passengers\crew\cars,
  deadweight (max), maximum continuous\service
  speed,average fuel consumption, propulsion
  description,environmental conditions
• Project general concepts are described (see tech
  specif.)
• Deadweight capacity,tank capacity,weight
  list,performances (speed, seakeeping) noise
  levels, vibration and vibration
  strengthenings,Stability and pre-selected Test
  \Trials informations are given

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Hull

• Informations about
• Scantling,Materials,welding and structural
  connections
• Externall shell Plating
• Watertight bulkheads
• Decks\superstructures
• Foundations
• are given

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Propulsion Plant

• General informations
• Informations about Propulsion Units,Transmission
  and Propulsion System, Propulsion Support
  Systems, PMS, Sea Water system,Fuel oil system
  and so on
• are given

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Electrical Plant

• General
• Electric system configuration
• Protection and Distribution System
• Electric motors and Starters
• Electric Cables
• Generators
• Accumulator Battery
• Power Distribution System
• Lighting System

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Conclusion

• The Tool should be used first of all during
• the Basic Design phase
• and then
• in the other Design phases to
• evaluate the alternative design Solutions