From:	Lawrence E. Dudek
Sent:	Friday, November 05, 2010 10:39 AM
To:	NSTX Center Stack Upgrade Team
Subject:	Notes from NSTX CSU Project Meeting 11/3/2010
Attachments:	20101101 NSTX UPGRADE Calculations-TitusOct27.xls; 
ATT1898436.htm

Notes from 11/3 Meeting:

Torque Frame and PFC update (Dudek)
Decision was made to stop work on the Torque frame to concentrate on the local reinforcements. 
 The latest round of analysis indicates that the local reinforcements can be made to work if some 
reinforcement at the clevis is permitted. This would be the best value path forward.

A meeting was held earlier on Wednesday to review the need to use CFC tiles for first plasma.   
The CFC tiles tend to trap Lithium compounds in the composite matrix and would likely 
contaminate the plasma.  Decision was made by M. Williams to go with a high quality graphite 
instead but maintain the heat load capacity of the remaining hardware to allow an upgrade in the 
future to another tile material, possibly Moly.  Analysis team still needs to provide guidance to 
operations on what the graphite tiles could tolerate in the way of heat flux.

Update on NSTX CSU Analysis (Titus) (Attached)
The Calculation log has been updated with some dates from Pete for the coil support structures 
to be done in mid January.  Mark Smith indicated the dates should work for his schedule.  Still 
need inputs from the remaining design engineers for dates.

ACTION: Cog engineers (Tresemer, Chrzanowski, Priniski, Labik, Hatcher, Ellis) to provide the 
dates for completion.  Orlando to followup with engineers before next meeting.

Outer TF and Umbrella structure design (Smith) (see VG for details)
Mark provided an update for the design of the outer leg supports and 
umbrella.  Reinforcement in the arches of the umbrella reduces loads to 
acceptable levels in almost all areas.  The areas that are high look to be 
manageable.  The arch reinforcement is shadowing the dome vertical ports 
and will be optimized further to provide more clearance if possible.

Umbrella Analysis Update (Zhang) (see VG for details)
Han provided an update and clarification of the work done previously on the 
umbrella arches and cylinder.  With the flanged and rib reinforcement the 
stresses were 28 ksi, without ribs 44 ksi.


Viewgraphs will be posted by B. Simmons at:

http://nstx-upgrade.pppl.gov/Project_Meetings/CenterStackUpgrade/index_Meetings.htm