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Dome Hazard Analysis Discussion Jacques Sebag T&S Systems Engineer April 10, 2014

Dome Hazard Analysis Discussion Jacques Sebag T&S Systems Engineer April 10, 2014. Second Safety Council Meeting April 10 and 11, 2014 | LSST Project Office N550. Introduction. Hazard Analysis Process (covered by Chuck Gessner) Focus on Dome Hazard Worksheet JIRA Action Example

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Dome Hazard Analysis Discussion Jacques Sebag T&S Systems Engineer April 10, 2014

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  1. Dome Hazard Analysis DiscussionJacques SebagT&S Systems EngineerApril 10, 2014 Second Safety Council Meeting April 10 and 11, 2014 | LSST Project Office N550

  2. Introduction • Hazard Analysis Process (covered by Chuck Gessner) • Focus on Dome Hazard Worksheet • JIRA Action Example • Hazard Mitigations • Incorporation in the Dome Baseline Design • High Level Hazards linked with Project Risk Registry

  3. Hazard Distribution

  4. Dome Hazard Distribution (Before Mitigation) Dome hazards distributed into 4 categories Dome hazard distribution: Category vs Risk Level

  5. Dome High Level Hazards (Before Mitigation) *

  6. Dome Serious Level Hazards (Before Mitigation) Power ON during maintenance Shutter closure not possible Glass Safety Dome/Crane Motion and Platform Lift

  7. JIRA Action for Mitigation Analysis

  8. Three Mitigation Types: Interlock, Design, Procedure JIRA Action LIT-104: Create the full list of Safety Procedure Mitigations

  9. Design Mitigation Incorporation Exterior Top Platform Dome Maintenance Platform Access walkways Ladder System

  10. Ladder Systems with Intermediate Platforms and Safety Cable Safety Cable Intermediate Platforms

  11. Interface between Fixed and Rotating Ladders and Ducts 3” between ladders Height: 11’ Duct Interface to be designed by Dome vendor

  12. Portable Davit Crane for Personnel Rescue

  13. Safety Tie Off Points for Light/Wind Screen Maintenance Light/Wind Screen (upper) Tie Off Points Access walkways Ladder for Roof Access

  14. Dome Exterior Top Platform Upper Aperture Shutter Doors

  15. Dome Exterior Top Platform Access Hatch Sliding Hatch

  16. Man-Lift available for Dome Maintenance

  17. Light/Wind Screen Maintenance with Man-Lift

  18. High level Hazards Linked with Project Risk Registry

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