1 Second Safety Council Meeting Tucson 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 Second Safety Council Meeting Tucson 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 Second Safety Council Meeting Tucson April 2014Second Safety Council Meeting Tucson April Hazard Distribution

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

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

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

7 Second Safety Council Meeting Tucson April 2014Second Safety Council Meeting Tucson April JIRA Action for Mitigation Analysis

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

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

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

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

12 Second Safety Council Meeting Tucson April 2014Second Safety Council Meeting Tucson April Portable Davit Crane for Personnel Rescue

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

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

15 Second Safety Council Meeting Tucson April 2014Second Safety Council Meeting Tucson April Dome Exterior Top Platform Access Hatch Sliding Hatch

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

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

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