From:	Lawrence E. Dudek
Sent:	Thursday, December 16, 2010 3:22 PM
To:	NSTX Center Stack Upgrade Team
Subject:	NSTX CSU Meeting Notes from 12/15 meeting
Attachments:	20101213 NSTX UPGRADE Calculations-RTS_11112010.xls; 
ATT2203514.htm

Notes from 12/15 Meeting:

Reviewed the Analysis spreadsheet (See Attached)
Art Brooks is working on the PFC tile analysis. One area of concern is the effect of stress 
concentrations in the brittle graphite material.  No published data on how to design for the T-
slots in graphite.  Plan on minimizing the concentration and then pull testing a sample.  Kelsey 
will provide drawings of samples for Test Lab to fabricate and pull test.
Action: Jim Chrzanowski to provide another copy of the VV to PP bracket weld procedure to 
Titus.  Procedure contains as-built information on the welds between the VV and bracketry 
required to complete the analysis and qualify the welds.

CS Bellows Calculation (Rogoff) (see VGs)
Peter reviewed the status of his analysis on the CS Bellows. Analysis was performed using the 
thermal cycling from bakeout and the vacuum load on the bellows.  The analysis indicates the 
bellows will easily meet the fatigue life requirements in the GRD.
 
Update VV Analysis and Aluminum OTF Leg Blocks (Titus) (See VGs) 
We have been unable to locate material certs or other information to provide a good strength 
qualification for the OTF Leg aluminum mounting blocks.  The analysis performed assumes a 
minimum strength aluminum alloy was used without heat treatment.  The analysis using these 
numbers indicates that reinforcement of the aluminum block flanges will be required.  We will 
attempt to perform a chemical analysis on a sample taken from one of the blocks and use a 
portable Rockwell hardness tester to measure the actual hardness of the installed blocks to 
bracket the material strength.

Pete also presented the latest static and dynamic analysis of the VV to Leg connections.  Stresses 
look acceptable at 40-70 MPa.
PAST ACTION ITEMS: 
-Woolley to update % complete "DCPS TF Inner Leg Torsional Shear Stress ", "OOP PF/TF 
Torques on TF" (Items 34 & 36)
-Jim C to provide need dates for Analysis of CSU Poloidal Field Coils and Poloidal Magnetic 
Quantites for the Feb 2010 Provisional Design (Items 81 & 82)
-Titus to provide (item 39) coupled DCPS moment influence coefficients to 
Hatcher (12/15)
Viewgraphs will be posted by B. Simmons at:

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