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Risk Assessment Form to be completed in conjunction with the explanatory notes Officer responsible for assessing the Risk: Date Risk assessed: Task description: K.Tilley, M. Hughes. 12/03/2008 Interlock, Measurement & Soak tests of Q1,Q2,Q3,D1 Dipole Magnetic Fields Operation Description Hazard Environment Working Radiation with Number Exposed E V P Duration Likelih ood of injury L 3 0.5 day 1 1 0 Existing controls Severit y of injury S Risk LxS New control measures required Urgency of action 1 1 Film badge. Prior to working on magnets. Rados. Maintain distance from synchrotron. Cleaning of any contamination on hands etc immediately after expt. Environment Slips, trips and falls – due to cabling. 3 1 0 0.5 day 2 Environment Crane use 3 1 0 0.5 day 1 Cabling carefully laid out in cabin. 1 3 6 Remove any clutter before work starts – ensure clear access and exit ways available Prior to working on magnets 2 2 Be aware of crane activity. Make aware of presence. Prior to and during working on magnets. Electrical Electric shock 3 1 0 0.5 day 2 AC & electrical connections signed off. Interlocks checked. Two people required to be present whilst magnet observations made. (two mgt people or 1mgt + tgt people). Crew should be informed not to allow access if only 1 person in synch. 3 6 Avoid bus bars / copper water pipe Maximum for D1: (460MeV/c~1.4T~350A~153Volt s). Maximum For Quads at 200Amps:20Volts. Check p/s operates in current regulated mode with voltage limit if available. Prior to and during work on magnets. Magnetic fields Movement of magnetic objects. Disorientation in high fields. 3 1 0 0.5 day 2 Two people required to be present whilst magnet observations made. (two mgt people or 1mgt + tgt people). Crew should be informed not to allow access if only 1 person in synch. 3 6 Loose ferrous materials tidied away. Maximum field expected ~ 1.4 Tesla at centre. Limit time body parts in fields > 0.2Tesla, in accordance with SHE notice #.9. No pacemakers allowed in exptl cabin. No magnetic objects permitted during expt. During working on expt. Temperature Heat burns 3 1 0 0.5 day 2 Temperature measurements & flow checks to be made to be made 3 6 Avoid bus bars. Use temperature interlocks if available. Prior to and during work on 2 before experiment begins. Water All hazards Slips/leaks 3 1 0 0.5 day 2 Flow checks made before experiment begins Signage to be used to indicate magnets are live. 3 magnets. 2 4 Prior to and during work on magnets.