1. Paul Bellomo LCLS Power Suppliesbellomo@slac.stanford.edu March 30, 2006 1 LCLS Injector, Sector 21 and BC1 Power Supply Hazard Analysis Summaries P. Bellomo, A. de Lira, K. Luchini, D. MacNair

2. Paul Bellomo LCLS Intermediate Power Supplies bellomo@slac.stanford.edu March 30, 2006 2

3. Paul Bellomo LCLS Intermediate Power Supplies bellomo@slac.stanford.edu March 30, 2006 3 Intermediate PS Hazard Analysis EnergyHazardMitigation Electrical  Arc flash at rack main and branch circuit breakers and power supply output  Shock 480VAC, 650VDC, 200VDC  PAB = 1 inch  FPB = 6 inches  Stored PS and magnet energy < 20kJ  Category 0 and 2* PPE, 00 gloves  Bleeder resistors, ground hooks across filter capacitors, 00 gloves, safety glasses  Totally enclosed chassis  Totally covered PS/magnet terminals  Listed components when possible  EEIP Inspection at SLAC  JHAM and STA qualified workers FireTeaspoon amounts of flammable oil in electrolytic filter capacitors Not required. Other components are non-flammable or fire retardant Gravity100lb chassisTwo workers lift with mechanical assistance. Pressure Radiation NoneNot applicable TemperatureHot chassis/components (100 O C)Warning labels on components

4. Paul Bellomo LCLS MCOR Power Supplies bellomo@slac.stanford.edu March 30, 2006 4 MCOR Hazard Analysis EnergyHazardMitigation Electrical  Arc flash at input circuit breaker  Shock 480VAC, 120VAC, 650VDC, 60VDC in bulk PS and modules  PAB = 1 inch  FPB = 1 inch  Stored and magnet energy < 1kJ  Category 0 and 2* PPE, 00 gloves  Bleeder resistors across filter capacitors, 00 gloves, safety glasses  Totally enclosed chassis  Totally covered PS/magnet terminals  Listed components when possible  EEIP Inspection at SLAC  JHAM and STA qualified workers FireTrace amounts of flammable oil in electrolytic filter capacitors in bulk PS Not required. Other components are non-flammable or fire retardant Gravity100lb chassisTwo workers lift with mechanical assistance. Pressure Radiation NoneNot applicable TemperatureHot chassis/components (100 O C)Warning labels on components

5. Paul Bellomo LCLS MCOR Power Supplies bellomo@slac.stanford.edu March 30, 2006 5 Ethernet Controller, Ground Current Monitor, Soft-Start and VME Controller EnergyHazardMitigation Electrical  120VAC arc flash hazard  Shock 120VAC in chassis  Category 0 PPE  Class 00 gloves  Listed components when possible  EEIP Inspection at SLAC  JHAM and STA qualified workers FireNoneNot applicable Gravity Each VME chassis weighs approximately 50 lbs Two worker plus mechanical assistance Pressure Radiation Temperature NoneNot applicable

6. Paul Bellomo LCLS Racks bellomo@slac.stanford.edu March 30, 2006 6 Rack Hazard Analysis EnergyHazardMitigation Electrical  Shock 480/120VAC, 200V DC  Stored energy < 20kJ  PAB = 1 inch  FPB = 6 inches  Arc Flash 0.2 cal/cm 2  Category 0 and 2* PPE, Class 00 gloves  Proper grounding  All welded construction  Metal straps between doors and frame  EEIP inspection at SLAC FireNoneAll non-flammable materials Gravity  3,000lbs  Review of rack design and fabrication drawings by seismic committee  Secure in accordance with seismic committee guidance  Installation by qualified workers Pressure Radiation Temperature NoneNot applicable

7. Paul Bellomo LCLS Cables bellomo@slac.stanford.edu March 30, 2006 7 DC Cable Hazard Analysis EnergyHazardMitigation Electrical  Shock  Proper insulation voltage class  Jackets on cables pulled in cable trays  Segregated in raceways/trays  Isolate cables from public via raceways Fire  Overheating  Smoke  Size conductors for ampacity per NEC  Fire retardant insulations and jackets  Low smoke, zero halogen construction GravityWeight of many cablesSupport systems meet seismic, NEC and NEMA VE-1 requirements PressureNoneNot applicable RadiationNoneNot applicable Temperature  Hot cables from excessive current and/or packing  Size conductors for ampacity per NEC to keep temperatures within insulation rating  Cable tray/raceway fill/isolation per NEC

8. Paul Bellomo LCLS Cables bellomo@slac.stanford.edu March 30, 2006 8 Sector 21 Switchover Circuit Hazard Analysis EnergyHazardMitigation Electrical  Arc flash at input circuit breaker  Shock 480VAC, 200VDC, 300ADC when working with Bulk PS  Shock 120VAC when working with SLC-LCLS configuration box  Snubber capacitor (100  F) stored energy 2J  200A, stored magnet (42mH) energy 840J  Category 0 and 2* PPE, 00 gloves  Bleeder resistors across filter capacitors, 00 gloves, safety glasses  Totally enclosed chassis  Totally covered PS/magnet terminals  Listed components when possible  EEIP Inspection at SLAC  JHAM and STA qualified workers FireSmall amounts of flammable oil in electrolytic and snubber capacitors Not required. Other components are non- flammable or fire retardant Gravity<50lb chassisSTA qualified workers Pressure Radiation NoneNot applicable TemperatureHot chassis/components (100 O C)Warning labels on components

9. Paul Bellomo LCLS Power Suppliesbellomo@slac.stanford.edu March 30, 2006 9 Hazard Analysis Conclusion We have identified all recognized energy sources and hazards We have instituted appropriate controls in the system and component designs to mitigate the hazards to personnel and the environment