Safety%20Organization%20and%20Safety%20Measures%20for%20the%20Installation%20of%20LHC%20Experiments%20at%20CERN

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Safety Organizationand Safety Measures for the
Installation ofLHC Experiments at CERN
Marc Tavlet, GLIMOS / ALICE CERN, Switzerland,
Europe ?
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Safety Organizationand Safety Measures for the
Installation ofLHC Experiments at CERN

• Outline
• Safety Organization
• Safety Teams
• Procedures for personnel (and visitors)
• Procedures for the work
• However, accidents do happen
• Conclusions ?

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s/alices2.gif
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http//maridor.home.cern.ch/maridor/pic_alice/LAYO
UT_2K/lay_out.html
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Safety Organization at CERN,according to
SAPOCO/42

• Safety responsibilities follow the managerial
  lines
• This scheme will be follow when the detectors are
  commissioned and the experiments are put into
  operation.
• This scheme is valid outside LHC work-sites. Ex
  Test beam areas.
• SAPOCO/42 CERNs law in mater of safety
  http//safety-commission.web.cern.ch/safety-commis
  sion/sapoco42/index.html

DG / CEO
PH Dept Head

Tech. Coord. / GLIMOS
Project Leader
Project Engineer
Draftsmen, technicians, users
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BUT, Safety Organisation for LHC Experiment
Installations
Overall responsibility of the Experiment ( PH
Department )
Installation under the responsibility of
TS Department

Experimental Area Manager (EAM) TSO
Technical Coordinator / GLIMOS
RSO, FGSO
Work-Package Eng.
Project Leaders
Safety Coordinator
Work-Package Supervisors
Project Engineers
Designers, technicians, users
Workers, technicians, users
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Safety Team / Design

• GLIMOS Group Leader in Matter of
  Safety, accountable to the PH Department
  Head, responsible for the overall safety of the
  Expt.
• FGSO Flammable Gas Safety Officer
• RSO Radiation Safety Officer
• INB link-person (French legislation / Nuclear
  Installations)
• Safety Coordinators professionals who help the
  Glimos, EAM and any supervisor
• Experts of the Safety Commission

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Examples of Engineering Designs for better Safety
in the Detector

• Use of halogen-free flame-retardant cables
  (IS-23)
• Use of halogen-free flame-retardant materials
  (IS-41)
• Halogen-free Printed Circuit Boards wherever
  possible
• Avoid Polystyrene, Nylon (PVC is forbidden !)
• Metallic pipes for cooling instead of plastic
  ones
• Silicone rubber to replace EPDM
• Non-flammable gas mixtures
• Sniffer N2 inertion systems
• Safe switch-off of LV-PS in case of power failure
• Grounding of all LV- and HV-PS
• Fix ladders and platforms for better access

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Safety Team / Installation

• GLIMOS Group Leader in Matter of Safety
• TSOs Territorial Safety Officers
• EAM Experimental-Area Manager
• Safety Coordinators professionals who help the
  Glimos and the EAM
• Team for First-Aid (in any building)
• Fire-Fighters of the Safety Commission
• Inspectors of the Safety Commission

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Examples of measures taken for better Safety
during Installation

• Fire detection already operational
• Escape routes identified
• Priority to collective equipment vs personal ones
• Enforce wearing personal protective equipment as
  well
• Use scaffoldings (mounted by trained people)
  instead of ladders
• Any platform higher than 80cm must have
  protection barriers plinths
• Adapted ladders and platforms to access strange
  devices

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Procedure for Staff-Members

• Safety Training for any new-comer
• specific training on the spot by Glimos
  supervisor
• specific training according to activities
  (welding, lifting, work at height, )
• Access rights (for specific areas - ?)
• Safety equipment
• - standard
• specific

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Rules for Visitors

• Visitors must be accompanied by a trained guide
• Max 12 visitors/guide on surface
• Max 7 visitors/guide underground
• Visitors must wear comfortable shoes helmet
• Specific training (incl. Safety) for guides
• Dedicated visit circuits for guided tours

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Procedure prior the start of work at experimental
areas
A.O.C.
( Fire Permit )
W-P. Eng.
E.A.M.
Safety Coordinator
W-P. A.M.
Glimos
initiates
check
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Display of safety documents procedure at the
place of work
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Review of Accidents during ALICE installation
Place Dept Event Victim Damage
SXL2 PH Machining in the workshop (2 X) hands 0
SXL2 PH Fall from a 80 cm platform bassin 0
SXL2 PH Fall against a machine lip 0
SXL2 TS Break and fall of a hinge from a high door no hinge
SX-2 TS Overhead crane no major
UX-25 TS Overhead cranes (2 X) no minor
UX-25 PHTS Break of a tie-rod of dipole no tie-rod
UX-25 PHTS Scaffolding into the dipole no scaffolding

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The overhead-crane accident

• No precise written procedure
• Procedure not followed
• - Modification of attachment point.
• Modification of safety switches.
• - Crane hook went into crane frame.

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The scaffolding accident

• Precise procedure was written
• Procedure exclude the use of the steel
  scaffolding
• Staff ignored the interdiction.
• Consequence ?
• (fortunately, no one injured)

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Conclusions

• We do have
• a safety plan, a safety team,
• safety procedures for personnel,
• safety training adapted to places and activities,
• safety procedures, including safety visits for
  work.
• However, accident do happen !
• Ways to reduce accident occurrence
• More supervision on the spot,
• TALK to people (team spirit)
• any good idea ?