1. 1 Second Safety Council Meeting Tucson 10-11 April 2014 Name of Meeting Location Date - Change in Slide Master 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

2. 2 Second Safety Council Meeting Tucson 10-11 April 2014 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. 3 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Hazard Distribution

4. 4 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Dome Hazard Distribution (Before Mitigation) Dome hazards distributed into 4 categories Dome hazard distribution: Category vs Risk Level

5. 5 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Dome High Level Hazards (Before Mitigation) *

6. 6 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Dome Serious Level Hazards (Before Mitigation) Shutter closure not possible Glass Safety Power ON during maintenance Dome/Crane Motion and Platform Lift

7. 7 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 JIRA Action for Mitigation Analysis

8. 8 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Three Mitigation Types: Interlock, Design, Procedure JIRA Action LIT-104: Create the full list of Safety Procedure Mitigations

9. 9 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Design Mitigation Incorporation Ladder System Dome Maintenance Platform Access walkways Exterior Top Platform

10. 10 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Ladder Systems with Intermediate Platforms and Safety Cable Safety Cable Intermediate Platforms

11. 11 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Interface between Fixed and Rotating Ladders and Ducts 3” between ladders Duct Interface to be designed by Dome vendor Height: 11’

12. 12 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Portable Davit Crane for Personnel Rescue

13. 13 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Safety Tie Off Points for Light/Wind Screen Maintenance Access walkways Light/Wind Screen (upper) Tie Off Points Ladder for Roof Access

14. 14 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Dome Exterior Top Platform Upper Aperture Shutter Doors

15. 15 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Dome Exterior Top Platform Access Hatch Sliding Hatch

16. 16 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Man-Lift available for Dome Maintenance

17. 17 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 Light/Wind Screen Maintenance with Man-Lift

18. 18 Second Safety Council Meeting Tucson 10-11 April 2014Second Safety Council Meeting Tucson April 10-11 2014 High level Hazards Linked with Project Risk Registry