1. SLAC Accelerators Power Electronic System Operation for Reliability
F. Rafael 04/13/2011

2. SLAC Accelerators Power Electronic System Operation for Reliability
Agenda
Overview
PCD Organization
Tools
Reliability metrics and numbers
Accelerator Improvement Programs
Design for reliability
Conclusion
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3. SLAC Accelerators Power Electronic System Operation for Reliability
Overview
PCD Sustaining Engineering
SSRL (SPEAR3)
LCLS (1/3 LINAC)
NLCTA
FACET (2/3 LINAC)
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4. SLAC Accelerators Power Electronic System Operation for Reliability
SLAC Organization
SLAC is now a multipurpose laboratory for astrophysics, photon science, accelerator and particle physics research.
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5. Service Level Agreement (SLA)
Core Teams and PCD-SE
Machine
Value
Comments
Perform Period FY
One Year
Scope
Equipment coverage
Coverage
Availability
>99%
Critical Electrical Equipment
Contact Personnel
Syst. Managers
Includes Escalation Policy
Budget
FTE
Power Eng.
Power Tech
Eng. Service
M&S $k
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6. Power Conversion Department - PCDSE
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7. Power Conversion Department - PCD
Work Planning & Control
Plan the job right or don't do it!
Work Planning and Control (WPC) is a standardized process used to understand the scope of work, identify qualified workers, evaluate & control hazards, communicate hazards & controls to workers, authorize, coordinate & release work and perform it within established controls.
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8. Power Conversion Department - PCD
TOOLS:
PEM Work Flow
24/7 coverage
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9. Power Conversion Department - PCD
Tools: CATER
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10. Power Conversion Department - PCD
Tools: E-LOG PEM
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11. Power Conversion Department - PCD
Tools: Documentation – SODA*
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12. Power Conversion Department - PCD
Tools: Documentation - CAPTAR
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13. Power Conversion Department - PCD
Tools: Documentation - Inventory
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14. Power Conversion Department - PCD
TOOLS: EEIP
SLAC – Electrical Equipment Inspection Program – EEIP
Primary deployed for safety, has demonstrated improvement in reliability and used as part test acceptance and QA.
Based on
UL – 508A – Industrial Control Panels
UL – 61010A-1 Electrical Equipment for Lab. Use
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15. Electrical Equipment Inspection Program- EEIP
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16. Electrical Equipment Inspection Program- EEIP
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17. Electrical Equipment Inspection Program- EEIP
bonding conductor
Table 15.1 of UL 508A
Spacing
Table 10.1 and Table 10.2 of UL 508A
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18. Electrical Equipment Inspection Program- EEIP
Poor workmanship:
UL508A
Wiring Methods: no loose strands protruding from the connection.
Code Violation:
NEC Section (A):
Terminals for more than one conductor … shall be so identified
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19. SLAC Accelerators Power Electronic System Operation for Reliability
Reliability Metrics
Power Conversion Department Numbers
2010 – 2011 Run
LCLS
SPEAR3
MTTF
84.1 (Hrs)
588 (Hrs)
MTTR
0.64 (Hr)
1.45 (Hr)
Availability
99.24%
99.75%
Details from LCLS run was covered Monday presentation
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20. Reliability Metrics – SPEAR3 Breakdown per System
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21. SLAC Accelerators Power Electronic System Operation for Reliability
Reliability Metrics
SLAC Accelerators Power Electronic System Operation for Reliability
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22. SLAC Accelerators Power Electronic System Operation for Reliability
Reliability Metrics
SLAC Accelerators Power Electronic System Operation for Reliability
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23. Accelerator Improvements Program – AI’s
LCLS Modulator failures current account for 66% of the power electronics total
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24. Accelerator Improvements Program – AI’s
1/3 of LINAC ($2 MI)
10 Sectors
8 Modulators per Sector
Modernization
Cabinet 1
AC input
IOC’s
Interlocks
Cabinet 2 and 3
PFN
Switch (thyratron)
Successful implementation of both upgrade projects along the length of LCLS is expected to reduce modulator failures by 60%.
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25. Design for Reliability
Paul Bellomo and Dave MacNair SLAC National Accelerator Laboratory ARW Vancouver, Canada January 26-30, 2009
Non-redundant - PEP II, SPEAR 3, LCLS (1994 – 2006)
Power supply quantity is hundreds, not thousands
Power supply availability budget is modest 98%
Non-redundant supplies satisfied availability budget
Redundant power systems not readily available from industry
Redundant systems would not fit within cost and schedule constraints
Redundant - KEK ATF 2 (2006 – 2008)
Mock-up of ILC Final Focus accelerator
Magnet power supplies ILC-like
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26. Design for Reliability
KEK ATF 2 Approach
By P. Bellomo & D. MacNair
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27. Design for Reliability
Goals
All components N+1 modular and redundant
Power module hot-swappable
Unipolar or bipolar output from a single unipolar bulk voltage source
Imbedded controller with digital current regulation
Capable of driving superconducting magnets
High bandwidth for use in BBA or closed orbit correction systems
High stability and precision output current
High accuracy read-backs
Scalable to higher output levels
Applications
ILC and other future accelerators
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28. SLAC Accelerators Power Electronic System Operation for Reliability
Conclusions
PCD has successfully demonstrated using Sustaining Engineering model accomplish target goals either to support users accelerator program and experimental facilities as well. The same PCD model can accommodate Accelerator Improvements Programs and new developments for futures requirements specification, targeting High Availability Systems.
Last but no least…
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29. SLAC Accelerators Power Electronic System Operation for Reliability
Now IKEA
Thank you!
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