Summary of NCSX
System Integration Team (SIT) Meeting of Tuesday, January 3,
2006
1. Risks
- Reaching closure on VV
design issues. Brad recommended a set of R&D activities intended to
expedite resolution of a number of VV design issues. The recommendations were
discussed and dispositioned as follows.
- Attachment of the
flexible H/C tubes to the vacuum vessel. The NSTX center stack shell
mockup, left over from the NSTX project, will be used to prototype tube
attachment methods and measure the heat transfer performance, the key
unknown for finalizing the design. Set up is already in progress and first
results are expected by 1/13. Action: Goranson proceed as planned.
- Installation and
performance of the boots that seal the gaps between the VV ports and the MC
shell. The proposal is to use a section of the Rohwedder PVVS,
including the port, with the port protruding through a hole in some sort of
washtub-like mockup of the MC shell, a boot sealing the gap, and pourable
insulation filling up the washtub. Issues to be addressed are: cost of
fabricating and installing the boot, performance of the boot in in terms of
holding in the insulation, and perhaps insulating material behavior under
installation, operation, and removal. The basic objective is to come up with
a practical and affordable boot design. Action: Brad produce a work
plan with schedule and resource requirements and provide to Ron. This is new
work that will require contingency.
- Performance of the
heating tapes in controlling the temperature along the ports. The
proposal is to include heating tapes on the Rohwedder port in the set-up
described in the preceding bullet, along with I&C needed to test
temperature control. The objective is to demonstrate that such an
arrangement can maintain a near linear temperature gradient along the port
and 150 C temperature at the flange with the vessel at 350 C. Concerns
raised in the discussion were: does DIII-D experience provide sufficient
confidence without additional tests? Can we mock up the real situation
adequately to provide a relevant test? How costly and time-consuming will it
be to do an adequate mockup and do the benefits outweigh the costs?
Action: Brad contact DIII-D (e.g. Paul Anderson) to get more
information about their experience. Establish the minimum requirements for a
relevant test.
- Updated plan for addressing
MCWF delivery schedule risks. (Phil)
- Jan. 4-6 (current week):
Technical requirements review at Major Tool. Can we benefit the
delivery schedule by relaxing low-value/high-cost requirements (e.g.,
tolerances)? Phil will arrange teleconference participation in
closeout meetings or debriefing later in the week, as he thinks appropriate.
Use SIT teleconference number: 1-877-653-7764, code 361326#.
- Week of Jan. 9:
Implementation of a strategy and plan, including direction to EIO, for
improving MCWF delivery schedule. Responsibility: Hutch
- Week of Jan. 16:
Meeting with EIO at PPPL Jan. 16 to review schedule improvements
resulting from technical changes, and discuss initiatives to improve
schedule. Meeting at Major Tool later in the week (tentatively Jan. 17), if
it appears useful, to continue the discussion of schedule improvement.
Phil to arrange
- Weeks of Jan. 23 and Jan.
30: Brief DOE-PSO (Pitonak and Makiel) on status of MCWF schedule and
improvement initiatives, as part of preparation for the FY06-1Q quarterly
review planned for the week of Feb. 6. Continue to work the MCWF improvement
plan with EIO. Update Lehman Review recommendations log. Dry runs for
quarterly presentations, probably by Hutch and Ron.
- Week of Feb. 6: FY06-1Q
quarterly review for OFES. Report substantial progress on MCWF
get-well plan, along with updates on MC winding schedule and TF sourcing, as
requested at November Lehman review.
2.
FY-06 Planning Changes
- The financial flexibility
exists to pull work scope forward from FY-07 to FY-06. Also, expected delays
in VVSA and MCWF deliveries require some re-planning and provide additional
pull-forward opportunities. Key work scopes were discussed.
- TF Coils (WBS 13):
A competitive procurement action for the TF coil assemblies (coils
assembled to wedge supports) has been initiated. Kalish is the job manager.
Some design deliverables need to be finished up in order for the RFP to be
issued by Feb. 1. Goal is to award by 4/15/06. Information meeting for
interested suppliers is scheduled for Jan. 10.
- PF Coils (WBS 13):
Complete the design during Feb-May, 2006. Award by October,
2006. Kalish is the job manager. Availability of designer support is
an issue. Wayne will work the staffing issues.
- Trim Coils (WBS 13):
Complete the design during June-Sept., 2006. Award in FY-07. Kalish is
the job manager. Physics is responsible for establishing the requirements in
time to support the design effort. Mike Z. is responsible.
Availability of designer support is an issue. Wayne will work the
staffing issues.
- Structures (WBS 15) and
CS support structure (WBS 13): Complete the design in parallel with the PF
design, during Feb.-May, 2006. Award by October, 2006. Candidates for
job manager (Dahlgren) and designer support (Messineo) were discussed.
Wayne will work the staffing issues.
- Cryostat (WBS 17):
A study has been conducted to determine whether to continue with the
existing design concept or move to a new concept. Wayne reported that the
recommendation is to stay with the existing concept, though work is needed
to address its problems. A presentation will be scheduled during the week of
Jan. 9 to explain this decision and the planned solutions. Wayne will
schedule the presentation, coordinating with Mike Z.’s calendar. The plan is
to complete an “advanced preliminary design” by March, the basic goal being
to re-establish a viable model of the cryostat that is properly integrated
with the rest of the stellarator core. Gettelfinger is the job manager.
Candidates for designer support (Messineo) were discussed.
Wayne will work the staffing issues.
- Field period assembly
(WBS 18), power systems (WBS 4), base structure (WBS 17), and shield wall
(WBS 7) work were also discussed. Wayne is working these plans
with the WBS managers.
- Responsibility: Wayne
ensure that updated work plans are submitted to Ron. Wayne and Ron incorporate
plans into FY-06 schedule.
3. Project Control
(Ron)
- December job status
meeting will be Friday, January 6, at
8:00-12:00.
4. Next SIT Meeting: Jan.
9.
Summary by:
Hutch
Neilson