TO: Starlite Study Team DATE: 23 Mar 1995 FROM: L. Waganer

SUBJECT: Starlite Conference Call Minutes, Friday, 22 March 1995

PARTICIPANTS (by organization): Billone, Dean, Herring, Bathke, Waganer, Bromberg, Hofer, Flynn, Steiner, Miller, Najmabadi, Mau, Tillack, El-Guebaly

ADMINISTRATIVE ISSUES The minutes for the 3 March Conference Call were distributed.

The date of the next project meeting was affirmed as 11-12 May (Thursday and Friday). It is being held in conjunction with the ANL Liquid Metal Insulator Workshop (May 8-9). Our materials Town Meeting will be held on Wed, 10 May. Mike Billone will distribute an agenda for the town meeting. The tentative location is to be at the Hickory Ridge Conference Center at Lisle, IL.

Ron Miller is collecting the list of Starlite/Pulsar papers to be presented at the Fall IEEE conference/symposium (Abstracts due 1 May).

The next conference call will be on Wednesday, 5 at 9:30 PST, back to our old number of 314-232-7776. I have it set up for several months on alternating Wednesdays.

Report on the 13-16 March Japan/U.S. Workshop - The EU and Japan are more oriented to near-term technologies whereas the US is trying to obtain a solution with a low risk between the Demo and the commercial machine by using advanced technologies. China is trying to use a hybrid reactor to supplement an increased fission energy base. EU highlighted work done on their Safety and Environmental Assessment of Fusion Power (SEAFP) project. Good results were obtained with both FS and vanadium design approaches. JAERI has been working a plant design, DREAM, that has been optimized for maintenance. This approach is similar to that taken by ARIES and PULSAR. The University of Tokyo is also designing a Inductively Driven Tokamak with a pulse length of 5-10 hours coupled with a pumped hydro. Najmabadi and Miller were impressed by the Large Helical Device experimental facility that Japan is building. The large helical coils are to be wound on-site around the machine. The vacuum vessel is 12 m in diameter and they are holding tolerances of 3 mm on the vessel and 1 mm on the coils. They also are evaluating the commercial capabilities of this type of machine. There was a paper describing the radiological benefits of isotopically tailoring the structural materials by Laser Isotopic Separation or Gaseous Diffusion. Some materials could be drastically improved whereas other would have little or no benefit. For instance, FS could be improved to be better than vanadium in the short term. LIS is the preferred approach that may be prohibitively expensive for a structural material. L. Waganer has distributed a sign-up list for distribution of the papers.

Starlite PROJECT STATUS

Task 1 - (Mission/Goals) F. Najmabadi noted that there were only minor affimatory comments following his Starlite Mission and Goals presentation at the J/U.S. Workshop so long as the goals were aligned with the "pre-commercial" machine. Mark Tillack has been working on the methodology to allocate/validate goals to be presented at the next CC.

Task 2. - (Economics) R. Miller is continuing to develop the process to correlate the cost of competing energy sources with higher escalating fuels. L. El-Guebaly received data from T. Dolan on Low Level Waste disposal costs.

Task 3 - (RAMI) Tom Flynn reported an internal Raytheon assessment on the future energy sources. The consensus was that although present coal and fission plants are functioning well and are cost competitive, they will not likely be replaced with advanced units. The problem is too many headaches getting public acceptance. Only the better existing units will survive for extended operation. Co-generation may be an acceptable alternative. Tom is also putting a summary of a Co-Gen plant operating experience on the WWW home page.

Task 4. - (Safety & Licensing) D. Steiner summarized the results of the recent Safety Conference Call. T. Dunn is preparing a list of tasks to be defined for the preliminary hazards analysis. This is will be a scoping study based upon the ARIES IV design approach. The goal is to have data for presentation at the ANL project meeting. The results from the SEAFP project presented at the Japan WS was discussed and Steve Herring is to contact Ian Cook to initiate dialog and future collaboration.

G. Hofer is being connected to Internet and soon will have his own address. The draft licensing reports have been approved by B. Dove and soon will be distributed. He continues to work on the tritium regulation and licensing report.

Steve Herring reported that the Fusion Safety Steering Committee met in San Diego Mar 14-16 to review the Volume I (Requirements) of the Fusion Safety Standard and its Basis and Rationale document. Volume I and its B&R are to be released for comment by the fusion community on March 31. Comments from within the committee and DOE are being incorporated now wherever possible. The one rem accidental release limit, which avoids the need for an off-site evacuation plan, will be retained. The assumptions to be used in the calculation of the off-site doses are still under discussion. The limits on the release of hazardous chemical will be taken from Local, State and Federal Permit requirements, 40CFR302.4 and 40CFR355 Appendix A, as suggested by Jerry Levine of Princeton.

Task 5A. - (Physics) T.K. Mau reported the Physics group has developed a second iteration of the physics Top Level Requirements with the intent to translate these into specific lower level plasma performance values (expect to complete in two weeks, next CC?). C. Bathke has put the first Low Aspect Ratio (LAR) strawman into the archives for physics review. He is also in the process of obtaining CAD software (ProEngineer) to enable CAD capability in his systems code.

T.K. mentioned that the PPPL NSTX project appears to have a reference LAR equilibrium that has higher beta and bootstrap current fraction than the equilibrium presently used by Starlite. These are to be examined to determine validity and applicability to our approach.

Mark Tillack is preparing a list of LAR engineering issues to be addressed. Peter Knight of UKAEA should be contacted as he has been working some of these issues.

Task 5B - (Engineering) Mark Tillack has issued an outline of the Ferritic Steel Assessment (for Demo) report for comment. Laila and Chuck conducted a simple costing exercise by replacing the vanadium with FS in ARIES II. The main cost impact is in the shield. A steel machine will be less expensive than V or SiC machines.

Laila El-Guebaly reported that ITER is not using a 1 rem/h limit for maintenance equipment, rather is using a range of dose limits depending upon specific equipment - quoted limits were in the range of 10^7 to 10^10 Rad total dose yielding a life from 1000-10,000 h. This may require the use of radiation-hardened electronics to survive the environment.

M. Tillack reported several alternate engineering concepts proposed. F. Najmabadi reiterated our project decision to table FS until further data is available and only consider vanadium for Demo 1 for the next few months. Mark also summarized the results from the liquid metal divertor workshop. Lithium and gallium are the possible candidates. An application on ITER seems remote, but it may be feasible to consider for a Demo application.