5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Safety Organization and Safety Measures for the Installation of LHC Experiments at CERN Marc Tavlet, GLIMOS / ALICE CERN, Switzerland, Europe ☺

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Safety Organization and Safety Measures for the Installation of LHC Experiments at CERN Outline:  Safety Organization  Safety Teams  Procedures for personnel (and visitors)  Procedures for the work  However, accidents do happen…  Conclusions ?

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15,

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15,

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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 = CERN’s law in mater of safety commission/sapoco42/index.html DG / CEO PH Dept Head Tech. Coord. / GLIMOS Project Leader Project Engineer Draftsmen, technicians, users…

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Experimental Area Manager (EAM) = TSO Work-Package Eng. Work-Package Supervisors Workers, technicians, users… BUT, Safety Organisation for LHC Experiment Installations Technical Coordinator / GLIMOS Project Leaders Project Engineers Designers, technicians, users… Overall responsibility of the Experiment ( PH Department ) Installation under the responsibility of TS Department + RSO, FGSO + Safety Coordinator

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005  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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005  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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Procedure prior the start of work at experimental areas Safety Coordinator E.A.M. PPSPS V.I.C. W-P. A.M. W-P. Eng. initiates check A.O.C. ( + Fire Permit ) Glimos

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Display of safety documents + procedure at the place of work

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 Review of Accidents during ALICE installation PlaceDeptEventVictimDamage SXL2PHMachining in the workshop (2 X)hands0 SXL2PHFall from a 80 cm platformbassin 0 SXL2 PHFall against a machinelip0 SXL2TS Break and fall of a hinge from a high doornohinge SX-2TSOverhead cranenomajor UX-25TSOverhead cranes (2 X)nominor UX-25PH+TS Break of a tie-rod of dipolenotie-rod UX-25PH+TSScaffolding into the dipolenoscaffolding

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005  No precise written procedure; + Procedure not followed: - Modification of attachment point. + Modification of safety switches. - Crane hook went into crane frame. The overhead-crane accident:

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005  Precise procedure was written; + Procedure exclude the use of the steel scaffolding  Staff ignored the interdiction.  Consequence  (fortunately, no one injured) The scaffolding accident:

5 th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005 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