From:                              Lawrence E. Dudek

Sent:                               Thursday, July 15, 2010 4:36 PM

To:                                   NSTX Center Stack Upgrade Team

Subject:                          NSTX CSU Project Meeting  notes from 7/14/2010

 

Notes from 7/14 Meeting:

Some dates to remember:

                        • Dry Run for Lehman Presentations wo 7/26

                        • Post all Materials (Cost,schedule,WAF's) Fri 7/30

                        • Job manager WAF preparations wo 8/2

                        • CD-2 Lehman Cost and Schedule Review August 10-11

                        • CD-2 September

                       

Update on Umbrella Lid  (Mangra) 

Danny presented the latest analysis using teeth and a thin lid.  Stresses in the lid SS teeth as well as the G11 donut are high.  Next iteration will require modifications in the teeth design to reduce stresses in both parts to acceptable levels.  Expect to have a solution for next week.

 

Update on OTF and PF 4/5 Supports [Smith (see VGs) ]

Mark gave an update on the refinement of the modeling of the coil supports.  Some minor changes are being made before hand off to analysis to minimize the analysis iterations.  On the OTF supports some reinforcement was added to reduce local stresses.  The PF supports look good as is.

 

Update on OOP force Inventory and Passive Plate Disruption modeling [Titus (see VGs) ]

The OOP force inventory inconsistencies have been ironed out between analysis and design group.  The differences were caused by the sharing of forces between the structures involved, the VV, TF Bundle and OTF legs.

 

Reopened the passive plate support models last used by Sri.  The model was run with and without Halo Curents.  Currents are present in the passive plates and VV.  More work is needed in the fastener meshing before the analysis can be finalized.

 

Update on PF Buss support analysis [Khodak (see VGs) ]

Andrei model the Upper inner PF Buss supports with elastomeric supports of two different elastic moduli.  The stresses so far look acceptable.  Need to adjust the model to account for the mounting of the PF 1 coils in the centerstack.

 

TF Bundle Thermal Analysis [Zhang (see VGs) ]

Han ran the inner TF bundle thermal analysis to look for tension in the copper to insulation bond joint.  Initial analysis indicated it could be a problem along the cooling tube passage.  Need to check the results for orientation of the stresses.