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SNS Visit

SNS Visit. Some Words about Operation. OPERATION DUTY. -Front-Ends System (H-Source) - Linac -Transfer and Stripping -Neutron Target. *Main Objective: Accelerate Safe Beam to Neutron Target Facility. *Make sure of the beam areas are safe: -PPS (Personnel Protection System)

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SNS Visit

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  1. SNS Visit Some Words about Operation SNS / F.Chapuis

  2. OPERATION DUTY -Front-Ends System (H-Source) -Linac -Transfer and Stripping -Neutron Target *Main Objective: Accelerate Safe Beam to Neutron Target Facility. *Make sure of the beam areas are safe: -PPS (Personnel Protection System) -Patrol before beam -Radiation Survey before Access *Monitor the Accelerator Facilities (identify, troubleshoot and report failures) *Intervene or Call specialists in case of necessity SNS / F.Chapuis

  3. OPERATION SCHEDULE Neutron Production (≈ 5months) Maintenance Period ( Summer + Winter) Monthly Accelerator Physic Study (48h) + 8h Maintenance + 16h Start-up Weekly Accelerator Physic or Maintenance of 8h +8h Start-up SNS / F.Chapuis

  4. OPERATION GROUP Operation Group composed by 18 peoples Group Leader Machine Specialist - Day - Maintenance/Operability Coordinator - Day - Operation Coordinator - Day - Control Room Shift Supervisor (10) - Shifter - Control Room Accelerator Specialist (5) - Shifter - → 15 peoples making 5 Shift Crews of 3 operators SNS / F.Chapuis

  5. SHIFT CREW Details Provide SNS Monitoring 24h/Day and 7d/week. *2 Shifts alternating = 12 hours (6:00/18:20– 18:00/6:20) - (+20min overlap) *Crew composed by: -3 operators from Op-Group (present in CR) -3 on-shift supports *Operators Crew composition in Normal Operation (= Neutron Prod.) : -1 Shift Supervisor (as Chief Leader) -1 Shift Supervisor -1 Accelerator Specialist *The crew composition may vary within Accelerator Start-up/Restore: from 1 to 3 ops. *On-Shift Supports composition: -1 RCT – Radiological Control Technician -1 OST – Operations Shift Technician -1 IHC – Instrument Hall Coordinator SNS / F.Chapuis

  6. SHIFT PLANNING SAMPLE SNS / F.Chapuis

  7. CONTROL ROOM • SNS Control Room similar to our a CCC operation Island: • *Round shape • *Overview Display • *Around 10 Work Stations • -7 screens By WS (6+1) • *1 “Table à Fondue”  SNS / F.Chapuis

  8. SAFETY SYSTEM → PPS PPS = PERSONNEL PROTECTION SYSTEM Accelerator Facility divided in 4 zones: Linac, HEBT (Injection line), Ring, RTBT (Extraction line) Functions: -Protect personnel from prompt radiation (beam operation) -Protect personnel from equipment hazards (RF Klystron, energized cables) -Shut off beam if equipment fault cause an abnormal radiation level -Warn personnel in zone before beam operation Technology: -Fail safe -Redundant PLC for each zone with separate network ways -No Hardware Loop -Linked with MPS (Machine Protection System) Operation: -Operating Modes (search, restricted access, power permit, beam permit,…) -Beam Containment Modes ( Ion source conditioning, Linactuning, Full operation,…) SNS / F.Chapuis

  9. EQUIPMENT FAILURE / TROUBLESHOOTING Equipment Failure - BEAST - Voice Message Beam cut by MPS Shift Crew Diagnostic MPS (Machine Protection System) protects the machine against beam Damage. MPS acquires status from several sensitive equipment, such as: -Power converts, -RF Hi and Low-Level, -Instrumentation: BLMs, BPMs,… -etc MPS may cut the beam (2 alarm levels) Remote Troubleshooting Not ok ok Specialist Intervention Staggered Beam Recovery Logbook Input SNS / F.Chapuis

  10. SUMMARY Similarities with us: *Operation Duty *Operation tools *Personnel Protection System with our future PSS Divergence with us: *Beam period shorter allowing more accelerator maintenance periods *Staggered beam recovery respected *No Alarm Display → MPS (GUI) replacing *1 Client Operation = calm atmosphere in control room *12 hours shift SNS / F.Chapuis

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