1. Advanced Conceptual Design Critical Issues
* Establishing the baseline VV geometry. (Brad)
- VV shell geometry is still too lumpy. Lumpiness amplitude currently exceeds our 3/8-in. manufacturing tolerance, so it would not make sense as a specification. A local firm with the latest Pro/E software has the capability to quickly model the NCSX vessel and smooth out the bumps. This will be done in the next day or two, then the VV geometry will imported back into the present Pro/E version.
- Brad later reported that ORNL has checked the new VV geometry for final assembly clearances, and found that final assembly appears to be feasible with a more nearly vertical joint than previous coil design, and a reasonable-looking flange geometry. Encouraging results.
- After establishing the shell geometry, the first wall geometry will be generated.
* Establishing the baseline modular coil geometry. (Mike, Brad)
-PIES runs for E01 and E03 coils are still having problems at the edge, even after current adjustments to push edge iota back down. There is a suspicion that the smoothed-out waviness may have been important to the magnetic surface quality. (Mike)
-New design by Strickler, smoothed with the help of COILOPT, has similar physics to E03 (Mike) but too-tight bend radii.
-Plan: Generate multi-filament versions of EO1 and E03, then check with PIES to see if they have acceptable surfaces. If time permits, look at Strickler design too. Evaluate by Thursday if possible, Friday for sure. If none of these is acceptable by then, live with the original, unsmoothed M50.z01.
* Diagnostic-Vacuum Vessel interface issues. (Brad)
- Issues were presented by Dave Johnson for WBS 3 at last week's (March 3) SIT meeting.
- Port interfaces and magnetic diagnostics space envelopes are deemed the most urgent issues from WBS 1 point of view. Finding space for trim coils may turn out to be an issue, too.
ACTION: Goranson to follow up with Johnson and Feder.
2. Preparation for the PDR
* A March 9 memo issued by Wayne identified design decisions urgently needing to be made to be ready for the PDR.
* A renewed effort has begun to resolve outstanding GRD issues and get the GRD approved. A list of comments and issues resulting from a review by WBS managers and others last Fall and compiled by Wayne, is being reviewed. A plan will be developed this week. ACTION: Hutch
* An Engineering Meeting is being planned for Friday, March 21 to kick off the preparations for the PDR. It is planned to cover WBS 1 in the morning and WBS 2-7 in the afternoon. In Wayne's absence, Brad is taking the lead in developing the agenda.
* Re-baselining: Ron will issue guidance memo to WBS managers later this week. The current cost and schedule baseline will be used as a starting point. Pointers to the source information will be provided. More schedule detail will be requested for this update.
3. Next SIT Meeting: Monday, Mar. 17.
Summary by:
Hutch Neilson