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

This article discusses the safety organization and measures implemented during the installation of LHC experiments at CERN. It covers safety teams, procedures for personnel, and safety measures for the work. The article also emphasizes the occurrence of accidents and suggests ways to reduce accidents through improved supervision and communication.

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

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

  2. Outline: Safety Organization Safety Teams Procedures for personnel (and visitors) Procedures for the work However, accidents do happen… Conclusions ? Safety Organizationand Safety Measures for the Installation ofLHC Experiments at CERN

  3. http://alice.web.cern.ch/Alice/Engineering/pictures/alices2.gifhttp://alice.web.cern.ch/Alice/Engineering/pictures/alices2.gif

  4. http://maridor.home.cern.ch/maridor/pic_alice/LAYOUT_2K/lay_out.htmlhttp://maridor.home.cern.ch/maridor/pic_alice/LAYOUT_2K/lay_out.html

  5. 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 = CERN’s law in mater of safety http://safety-commission.web.cern.ch/safety-commission/sapoco42/index.html Safety Organization at CERN,according to SAPOCO/42 DG / CEO PH Dept Head Tech. Coord. / GLIMOS Project Leader Project Engineer Draftsmen, technicians, users…

  6. 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…

  7. 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 Safety Team / Design

  8. 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 Examples of Engineering Designs for better Safety in the Detector

  9. 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 Safety Team / Installation

  10. 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 … Examples of measures taken for better Safety during Installation

  11. 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 Procedure for Staff-Members

  12. 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 Rules for Visitors

  13. PPSPS V.I.C. 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

  14. Display of safety documents+ procedure at the place of work

  15. Review of Accidentsduring ALICE installation

  16. 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.

  17. The scaffolding accident: • Precise procedure was written; + Procedure exclude the use of the steel scaffolding • Staff ignored the interdiction. • Consequence  (fortunately, no one injured)

  18. 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 ? Conclusions

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