1. NSTX Supported by NSTX Centerstack Upgrade Project Meeting P. Titus/EA Branch November 17, 2010 Lid/Cover/Flex Aluminum Block Bolting Stress And Stresses with Proposed Reinforcements

2. Offsets Used to Impose Moments Present Configuration

3. Produces High Bolt Stresses for the Upgrade Loads

4. The Upgrade PDR includes addition of a Reinforcing Plate Postulated Weld

5. Tresca Stress in Umbrella Structure Plate Present Configuration Proposed Reinforcement

6. No Reinforcement With Proposed Welded Reinforcement Plate

7. Preloaded Bolt Reinforcement ~90000psi Preload Bolt Stress is About the Same

8. Welds Extend these “Wings”

9. Welds

12. When the OOP force reaches 25% of nominal, the spoke lid springs upward

13. Spoke/Lid/Flex/Von Mises Stress peaks at 17.8ksi

14. Danny’s Crown Tooth Analysis He added a radius and we re- oriented the fiberglass reinforcement – but we need the updated design. Maybe Ali can add In TF Flag Calc?