• Modular coil deflections:  Brad reported on the status of ongoing analysis activities:
  
  • Dennis Strickler is now well positioned to take the deflection output from Myatt’s analysis and evaluate the resulting islands. Dennis should be in contact with Art Brooks to ensure that the project’s various approaches to this problem don’t diverge.
  • Len Myatt has calculated localized deflections of about 1 mm for the strong winding-pack case in the approximation that the pack is rigidly tied to the shell. Stresses were low. The soft winding-pack case is in progress.
  • Kevin Freudenberg’s model allows the winding to slide with respect to the structure, modeled as a stiff shell and deformable tee, and models the clamps.  His Mechanica results are consistent with ANSYS where they can be compared: stresses and global strains. Deformations are of order 1mm.
  • H.M. Fan’s global modeling is slow. It may not produce results in time for the FDR, even with more resources. Action: Wayne and Brad review analysis resource assignments.
    

Current assessment: Deflections are about 1mm and likely to be acceptable as they are stellarator symmetric. There is the fallback possibility of pre-displacing the coil if necessary. The pursuit of parallel approaches enhances the likelihood of getting useful results even if some approaches fall short, and enhances confidence in the results by providing cross-checks.

• Material properties testing and design criteria:  The main issue now is cyclic testing to determine the fatigue life of the coil. The test parameters and test program must be carefully chosen due to the limited number of test samples and limited amount of time remaining before the FDR.  A meeting on Monday afternoon, April 12, made progress but did not result in a clear path forward. A follow-up meeting is planned for Thursday, April 15.
  

Current assessment:  No information on fatigue life at this time.  Though cyclic testing will likely start soon there is a significant risk that we will not get useful data in time for the FDR, or that we will get negative or confusing results and not have enough time to follow up.  The SIT needs to stay on top of this issue.

• Machine geometry issues:  The assembly interference issue appears to be resolved. It will remain on the critical issues list for awhile to make sure it stays resolved.  Action: Brad keep an eye on it.
• FDR deliverables:  Brad reported that a complete set of VV and MCWF models and drawings has existed since the PDR. While they need to be updated for the FDR, they do not need to be created from scratch.   B-specs and C-specs are getting written and  peer reviewed in the current time frame.
  

• Winding fabrication issues:  Chill plates and bolted joints may need some additional engineering to come up with practical implementation concepts. Bob Parsells was recommended but his availability is unclear. Action: Dudek follow up with Brad.
• Planar racetrack coil tests: The planar racetrack will be the first article tested in the new coil test facility. There is still much to be done to get the facility  ready for testing. Geoff Gettelfinger is on top of it. Test results are not expected in time for the FDR.
• Weld joint R&D:  We will plan to complete the small-sample tests this fiscal year. We will plan conservatively to complete the full-scate test next year, but try to get it done this year if possible.
• VVSA Procurement:  The product spec was peer reviewed last week and the SOW will be peer reviewed this week. We will miss the April 13 schedule for release of an advance Spec and SOW to the suppliers by at least a week.
• MCWF Procurement:  A joint peer review of the product spec and SOW is scheduled for this Wednesday.  Next milestone is to release an advance Spec and SOW to the suppliers on May 5.   Action: Hutch follow up on SPEB-Project interface issues.
  

• Ron reviewed changes in the current estimates and management reserve spending decisions for FY-04.
• A transfer of an additional $317k from PPPL to ORNL has been approved by PPPL and will be requested of DOE.
• It was decided that ECP-6 will collect cost and schedule baseline changes only. A CCB is planned for next week. The goal is to get ECP-6 approved by the end of April.
• ECP-7 will define the FDR baseline and will include the technical, cost, and schedule changes associated with the reconfiguration of the ports.  ECP-7 will be prepared in draft form for the FDR. After being revised to reflect any changes coming out of the FDR, it will be approved before the Lehman review.
• Delays in the winding fabrication preparations are pushing this activity onto the critical path and threatening the overall schedule.  A corrective action plan will be needed for upcoming reviews.
  

• Hutch will update project status, plans, and issues at the quarterly meeting. Actions needed to support preparations:
  
  • Vu-graph on research preparation- Mike.
  • Forecast of ECP-6 and –7 contingency drawdown-  Bob.
  • Feedback on slides when issued later this week- All.