Minutes of 30 June 2003 SIT Meeting

 

  1. Re-baselined plans for FY03 and early FY04. Ron Strykowsky lead the discussion of the re-baselining effort.  It was agreed that marked up and statused WAFs would be requested for COB next Monday.  Action: Send out request to all job managers (Strykowsky).
  2. Critical issues being tracked by the SIT.
    1. Finalizing VV geometry.  Brooks has had a difficult time completing the VV shell definition.  In order for the assemble code to run efficiently, the number of modes has to be limited to ~100.  However, with 100 modes, the Fourier representation may be off by as much a 1cm from the Pro/E model.  In order to get the accuracy within 1mm, the number of modes has to be increased by an order of magnitude, which slows the code down to a crawl.  Brooks will provide more information at the meeting tomorrow during which the closure joint will also be discussed.  Action: Develop plan to complete the definition of the VV shell (Reiersen)
    2. Update modular coil winding to E04 and finalize wings and poloidal break.  Nelson reported that excellent progress has been made by Williamson incorporating the E04 winding geometry and modeling the wings.  The other good news is that the suppliers appear to be backing off their reservations about the poloidal break design.  Both suppliers will be given a go-ahead to pursue modeling of the wings and poloidal break in parallel with the effort at ORNL.  There was discussion of incorporating a low coefficient of friction coating to the winding form.  Teflon was mentioned as an option.  Zarnstorff questioned if teflon retained its low coefficient of friction at cryogenic temperatures.  Action: Williamson to (1) report on progress at Wednesday’s WBS 1 telecon and (2) consider adding a low coefficient of friction coating to the winding form.
    3. Conductor properties and allowables data.  Action: Of special interest are the CTE and thermal conductivity for the impregnated cable conductor.  On Wednesday, Zatz and Chrzanowski to report on:

                                                               i.      What is needed?

                                                             ii.      What are the results from CTD?

                                                            iii.      What is missing?

    1. Coping with thermal stresses. The degree to which thermal stresses are a problem is really a function of the CTE for the impregnated cable conductor.  At present, no tests have been initiated to determine the CTE between RT and 80K.  Zarnstorff expressed concern about using closed cell foam to open up gaps at low temperature.  Action: Nelson to initiate needed tests in time for PDR.
    2. Keystoning and demo coils.  Reiersen reported that the racetrack coil is now being wound.  The winding form for the twisted racetrack coil is nearly done.  The design of the winding pack, which should be based on our predictions for keystoning, is not in our current plans.  Action: Nelson to develop plan to address winding pack design for twisted racetrack, perhaps including it along with support for field period assembly as part of the $120K-$200K being sent to ORNL.
  1. Value Engineering Task Force.  Zarnstorff reported speaking with Ramakrishnan who indicated that little would be saved reducing the number of coil circuits below six or seven.  Action: Reiersen to ask Williams about proposed change in facilities for coil winding and field period assembly.

Next SIT meeting will be Monday, 07 July 2003.

 

Respectfully submitted,

Wayne Reiersen