Summary of NCSX SIT Meeting of Monday, Mar. 31, 2003
1. Advanced Conceptual Design Critical Issues
* Reference first wall, equilibria and waveforms.- Wayne
A reference FW geometry was developed based on the adopted
M50_256.z01 modular coil design and the best available vacuum vessel geometry
last week. There are some tight spots where the plasma-to-first-wall standoff
is less than 4cm. All information required to generate reference equilibria has
been delivered to Neil Pomphrey.
Conductor specifications are needed to generate waveforms
(cross section, # of strands, wire gauge, etc.)
ACTION: Dave Williamson deliver conductor info to Wayne.
* Establishing the baseline VV geometry.-Brad
There has been progress in smoothing out the surface and
Engineering is closing in on a preferred design.
ACTION: Engineering to decide. (Wayne)
* Conductor properties data.- Brad
Procurement of the contract for potted conductor R&D is
behind schedule and now the estimate has come in higher than budget. The
supplier workscope is being replanned and workarounds are being pursued to get
the critical information in a timely manner through a combination of ORNL,
PPPL, U.Tenn., and industry efforts.
2. Possible Modifications to FY-03 Work Plans
We discussed the need to significantly increase the
project's overall level of effort for the rest of FY03 (at PPPL in particular)
in order to accomplish the amount of work scope planned for this year. We
discussed a number of in-scope tasks that could be initiated now or soon:
* Metrology Plan
The project needs an overall strategy and plan for how
metrology will be done. Overall philosophy, framework for comparison of
component inspection data to design specifications, and how it will be used in
assembly of the machine and installation of future hardware.
ACTION: Brad generate a more specific list of the metrology
task requirements.
ACTION: Hutch do the same, capturing diagnostic needs.
ACTION: Wayne, Larry: identify task leader.
* E-beam mapping scenario
The e-beam mapping scenario needs definition. Are dynamic
measurements required? Will measurements be made with both cold and
room-temperature coils? What field levels? What apparatus? Et
cetera. Responsibility: Mike to work with WBS 3 and organize the
appropriate meetings to kick it off.
ACTION: Mike.
* Cryostat design.
Changes in the port configuration (non-radial extensions)
may or may not necessitate significant changes in the cryostat design. We
decided it was necessary to wait on the cryostat until the port configuration
is updated.
* Coil services
Low priority at this time.
* Will there be a splice in the modular coil?
Engineering decided: not for the PDR.
* Conventional coils
The TF and PF coil configuration has matured to the point
where Title I design can start. Responsibility: Mike Kalish.
ACTION: Brad contact Kalish.
* Modular Coil structure optimization to reduce eddy
currents.
At this time, we are going forward with the present design
with a single poloidal break and 18 toroidal breaks. The priority for the PDR
is to ensure that the design meets basic structural and diagnostic access
requirements. Whether to undertake further optimization (e.g., removing
material) to improve plasma control (eddy current reduction) and perhaps cost
will be decided later.
* Support structures
The machine support structure configuration has matured to
the point where Title I design can start. Responsibility: Geoff Gettelfinger
ACTION: Brad contact Gettelfinger.
* Seismic analysis
We are requiring that NCSX meet DOE seismic criteria. What
specific analyses must be done, and what loads? Requirements and analysis
plan are needed. Responsibility: Mike Kalish.
ACTION: Wayne contact Kalish.
* Cleanout of needed space in FCPC building
Larry reported progress with PPPL Engineering in deciding
where facilities to be displaced will be relocated. The FCPC cleanout activity
should be able to start soon. Larry continues to follow up.
* Preliminary design of Electrical Systems.
The requirements have not yet matured to the point where
Title I design can start. Probably after the PDR. Responsibility: Raki
Ramakrishnan.
* Machine assembly plan.
Update of the machine assembly plan will start soon and be
done for the PDR. It will need to be done in close association with WBS 1.
Responsibility: Erik Perry.
ACTION: Wayne follow up with Perry.
* Grounding Plan
The project is requiring a single-point ground and adequate
monitoring for maintenance and trouble-shooting. A more detailed plan with
requirements, design concept, interface requirements, is needed soon.
Responsibility: Raki Ramakrishnan.
ACTION: Larry follow up with Ramakrishnan.
* Diagnostics
It may be possible to accelerate work on some of the
in-scope diagnostics.
ACTION: Larry follow-up with Dave Johnson.
* Preliminary Integrated Systems Test Plan for CD-2.
This is needed for the PDR and CD-2. A candidate task leader
has been identified. Responsibility: WBS 82.
ACTION: Wayne follow-up.
3. Next SIT Meeting: Monday, Apr. 14 at 11:00.
Summary by:
Hutch Neilson