Summary of SIT Meeting of 6/17/02From: Hutch Neilson [hneilson@pppl.gov]
Sent: Monday, June 17, 2002 5:39 PM
To: wreiersen@pppl.gov; mzarnstorff@pppl.gov; bsimmons@pppl.gov; Brad Nelson; rstrykowsky@pppl.gov
Cc: John A. Schmidt; hneilson@pppl.gov
Subject: Summary of SIT Meeting of 6/17/02

Summary of SIT Meeting of Monday, June 17, 2002.


Progress along the critical-path schedule:


Modifying the Coil Design to Increase Plasma-Wall Clearance:


The PIES group (Stuart Hudson) is in the process of healing two new coil designs that Mike provided to gain ~2.5 cm of clearance between the plasma and first wall, by shifting the plasma toward the center of the VV (and away from the inner wall). One of the designs has reduced coil current density.


Mike expects to deliver a third case (still lower current density) to Hudson today or tomorrow.


The recent coil designs have more margin against ballooning instability than did M45. It is therefore expected to be easier to achieve balloning stability in the healed design than was possible with M45h.
ACTION: Mike set expectations with PIES group.


Modifying the Configuration to Increase Plasma-Wall Clearance


It was decided that Brad will use Poincare points from Grossman's field-line following calculations outside the LCFS to establish the stay-out envelope for the first wall.


To be useful for this purpose, the Poincare points must come from a healed design. We will take data from M45h (the only available healed design at the moment) and photgraphically expand it by 2.5% to approximate the new configurations with plasma shifted to the center of the VV that are now being developed.


Plan:
1. Brad will contact Mioduszewski to get the Poincare data that Physics wants used.
2. Brad will investigate recontouring the first wall with the goal of trying to encompass as many of the Poincare points (of the 2.5%-inflated plasma) as reasonably possible.
3. Brad will distribute pictures depicting the first wall and Poincare points at several toroidal angles, in a few days.
4. Based on what we see, we will decide what to do next (aim for next week's SIT meeting).


New Work Breakdown Structure and Budget Profile
The WBS has been revised recently. Magnetic diagnostics and field-period assembly have been moved into WBS 1. Wayne has written a document describing the changes in detail.


Since the CDR, DOE has provided a revised budget profile guidance for the MIE Project, namely $11.0M, $16.0M, $20.5M, $17.8M, $8.2M in FY03-07, respectively. Revised TEC is $73.5M and First Plasma is June '07.  A revised master schedule, based on a top-down modification of the CDR cost-schedule data base, was developed.


Plan:
1. Bob will revise the WBS dictionary.
2. For CD-1 purposes, we will use a cost rackup and milestone table generated from the top-down master schedule that matches the new guidance. We will map the costs onto the new WBS. (Ron)
3. The cost and schedule from Item #2 will become the project's initial cost-schedule baseline, which will then be placed under change control. (Wayne, Bob, Ron)
4. The revised cost and schedule will be iterated with the WBS managers to gain their ownership. If changes are needed to reconcile the top-down plan with bottoms-up planning, so be it. (Wayne)


New WBS 1 Organization
Wayne and Brad have developed an organization chart for WBS 1 activities in Preliminary Design, and a vision for Final Design. WBS Managers at the 2-digit level are: P. Goranson (WBS 11-12, VV and In-Vessel Components), D. Williamson (WBS 13-16, Coil Systems), T. Brown (WBS 17, Cryostat and Base Structure), and J. Chrzanowski (WBS 18, Field Period Assembly). All report to Brad Nelson, Stellarator Core Systems WBS Manager.  Mike Cole is responsible for Stellarator Core Design Integrations, as staff to Brad.


Some issues with respect to magnetic diagnostics management were noted.
1. Ed Lazarus will set requirements on type and location of plasma equilibrium diagnostics, but not details of sensor design nor requirements for MHD diagnsotics. Other physicists must be involved to address these issues.
2. Dave Johnson, as Diagnostics WBS Manager, must maintain a role in magnetic diagnostics, even if the scope is under WBS 1.
3. Interfaces involving magnetic diagnostics (e.g., with cables, integrators, and the data acquisition system) must be carefully worked.
ACTION: Mike and Wayne meet separately to identify issues of concern and possible resolutions.


Engineering Activities
Engineering is currently working with the aim of issuing the RFP for the modular coil R&D as soon as possible. A schedule date for issuing the RFP has not yet been developed; the planning needed to do this is still in progress.
ACTION: Brad continue to develop WBS 1 plans.


While planning is still going on, Engineering has initiated a number of tasks, taking advantage of the people that are available to work on the project. For example Tolerances (Brooks), structure alternatives (Fan), cooling concept alternatives (Fan), shell joint design (Dahlgren).


Brad proposed that a scoping study of the coil protection system should be started. He wants to know what coil protection capabilities to assume for purposes of setting coil fault protection conditions. As a first step, we decided to research NSTX experience.
ACTION: Bob find out who worked on coil protection for NSTX.


An alternative acquisition strategy for the modular coils is being considered by Engineering. It would involve delaying the award of manufacturing development contracts until after the preliminary design review. It was decided that we will stay on the CDR strategy, while this alternative is being debated.
ACTION: Brad take the lead in determining whether major changes in acquisition strategy are needed. Make recommendation.


Next WBS 1 Technical Meeting: Wednesday, June 19 at 1:30 p.m. EDT.  (Usual arrangements)
Next SIT meeting: Monday, June 24 at 11:00 a.m. EDT (Usual arrangements)


Please bring any corrections to my attention.

Thanks to all,
Hutch