TO: Starlite Study Team DATE: 17 July 1995 FROM: L. Waganer

SUBJECT: Starlite Conference Call Minutes, Wednesday, 28 June 1995

PARTICIPANTS: Sze, Wong, Bathke, Waganer, Bromberg, Hofer, Flynn, Najmabadi, El-Guebaly

ADMINISTRATIVE ISSUES

The June 12 CC minutes have been approved and distributed on 28 June 1995. 

The upcoming Utility Advisory Committee meeting will be held the day of July 31 and the morning of Aug 1, 1995. To make sure all the engineering details have been thoroughly discussed and a consensus reached, the Engineering Group has decided to meet all day Tuesday, Aug 1 in lieu of the conclusion of the UAC meeting. Results of the Engineering Group meeting will be summarized in the main Starlite Project Meeting that commences the morning of Aug 2 and continues through noon of August 3, Thursday. The Physics Group also has the option of a splinter meeting for a part or all of Tuesday. C. Wong offered to hose a project dinner at his house on Wednesday evening. Be sure to bring your swim suit!

The next conference call has been delayed one week until July 19 to enable the maximum effort be applied to the outstanding tasks.

PROJECT ACTIVITIES

Many members of the team were on vacation, at meetings, or attending to the Congressional budget process. D. Ehst did not participate, but provided input to L. Waganer. The Physics Group is working on obtaining baseline modeling for the Reverse Shear strawman. There is some uncertainty involving the bootstrap fraction results but the overall results look encouraging. The device size is relatively small for a 1000 MWe net power plant, which helps the capital costs. There was also discussion as to the peak TF strength that should be used. C. Bathke is getting ready to do a strawman system code run - results will be reviewed by the Physics Group for consistency and reasonableness. C. Bathke estimated the RS strawman would be distributed by 24 July and possibly as early as 14 July. C. Bathke may also show results of a low-aspect ratio code results the project meeting, but no preview data will be available.

C. Wong said there are no divertor physics work to be reported. He is getting ready to convene a PFC Working Group meeting. D.K. Sze reported A. Hassanein has modeled the particle effects of a divertor target plate.

L. Waganer reported issuing the schedule of activities to prepare the Design Options with the Vanadium Structure report. Briefly, the inputs to the Subsection authors are to be provided by 30 June, the subsection authors are to complete their drafts by 7 July and forward them to Waganer/Najmabadi, and Waganer is to complete the entire draft by 14 July to be distributed to the Engineering Group. There was some concern that some input drafts may slip slightly.

Leslie Bromberg reported the modeling complete of a FEM code for the magnets. F. Najmabadi asked about Leslie’s assessment of the impact of a failed field coil. In the present design, this presents a severe problem, but changing to a plate design will solve that problem. A disruption would not cause a problem.

T. Flynn brought up a typical concern that the vanadium piping may be limited to 500 deg C. But that is a limitation in an air environment and this would be avoided by the design approach of using cladding and/or an inert environment.

There was no CC report from the Heating and Current Drive system. [Status from T.K. Mau by e-Mail - He has been working with physicists and engineers to explore tokamak and physics issues that might impact the choice of coolant. It appears that physics will only affect the coolant choice in a secondary manner. There has been no further contact with RF experimentalists at TFTR on the database of antenna reliability since the last CC. T.K. will contact them again after July 4. T.K. received an eqdsk file from C. Bathke on the reverse shear equilibrium with A=3 to assess the effect of ion damping on edge current drive, however there are no definitive results yet.]

Work is in progress by engineering group to identify issues associated with the balance of plant for various V blanket options.

L. El-Guebaly reported that it has been decided that C. Bathke should use the modified shield design that was presented at the last project meeting for the strawman design basis. L. El-Guebaly is also collecting information and preparing a list of questions in regarding the maintenance scheme and equipment.

In the area of safety & licensing, Greg Hofer reported sending out drafts of his reports an receiving comments from the recipients. The major issue is the accountability of tritium since the accountability limit is 0.01 g while the uncertainty in tritium production can be tens of grams.

C. Wong reported that Tom Dunn and the group that works with him have received source terms for Event 1 and started to work the accident analysis for ARIES-IV type blanket. They have also requested two other source terms from Herring. The results of the accident analysis will be presented in the next project meeting.