ARIES Documents -- Meetings ArchiveARIES Conference Call, 9 January 2001
Documented by L. Waganer
The date for the next ARIES meeting will be 8-9 March 2001 with two full days of presentations. Wayne Meier will provide a meeting location near LLNL. This meeting will be held in conjunction with an ARIES Tritium Town Meeting at the same location. Dai Kai is arranging the tritium town meeting.
Professor Said Abdel-Khalik of Georgia Institute of Technology joined in the conference call. Georgia Institute of Technology has joined the team to help with the analysis and design of liquid and wetted wall power cores. Assistant Professor Minami Yoda of GT will also help contribute in this area.
The date of the next conference call was established as 21 February. Les Waganer will arrange for a conference call number.
The JA/US Reactor Design Workshop will be held March 29-31 in Kyoto. It was thought there would be some presentations on IFE but the main contributions would be magnetic confinement concepts with the ARIES team concentrating on ARIES-AT. The workshop will be held in conjunction with the IEA Social Economic Committee meeting.
Ron Miller said he was working off his action items, mostly developing the evaluation methodology, direct costs, and cost of electricity without a point design, rather a general parameter space. Wayne Meier said he has been making progress on his HI driver model.
Simon Yu mentioned an upcoming workshop on HI pinched beam transport, mainly applicable for dry wall concepts. This meeting will be held on February 13-15. Craig Olson will be one of the coordinators for the meeting.
Target and Chamber Physics
Bob Peterson reported that Don Haynes has been assessing the effects of very low chamber pressures. He is using the NRL target spectra; still at 160 MJ yield value, not the Sombrero value. The chamber radius is set at 6.5 m. The fill gas is Xenon. He is evaluating the dispersion of the debris products. He is not predicting any evaporation of the first wall surface monolayer. The team asked if the chamber pressure can be lowered to zero, other gases evaluated, and higher yields used. Bob thought that a Sombrero value of yield might result in some evaporation of the surface. The team also wanted to know the evaporation flux (rate) as a function of wall temperature from 600°C to 1450°C.
With the use of gold-plated targets, the dry wall soon would be plated with gold. Thus all wall properties must be evaluated with the gold coating.
Ken Schultz told Bob Peterson that the spectrum for the HI direct target should be similar to that of the HI indirect drive target he had given Don Haynes. He was quoting Max Tabak on that opinion.
Chamber Nuclear Analysis
Laila El-Guebaly has been analyzing the gold activation within the wall surface. She is also considering alternate materials.
Chamber Wall Engineering
Rene Raffray has been working to refine the thermal analysis and energy partitioning of the dry wall first wall and blanket concept. He has been looking at the solid and fibrous walls with different material combinations.
Wayne Meier talked about using a polarizer technique to improve the laser beam smoothness at the target. This is a problem with getting proper beam smoothness using GIMMs and transmissive optics.
Safety and Environmental Impact
Dave Petti has been identifying the accident initiators. He also has been constructing event trees to assess potential safety issues. Dave is also concerned about the significantly increased surface area of the carbon fibers of the velvet first wall materials. He mentioned that Jeff Latkowski has been looking at recycling target materials into new targets.
Target Fabrication, Injection, and Tracking
Ron Petzoldt discussed his progress of target tracking and mass production of layered targets. He is assessing the fluidized bed approach as a method of mass production. Filling the targets quickly enough is a problem with tritium inventory whereas the rapid processing might not produce a sufficiently smooth target surface.
Ron has also been looking at the reflectivity and emittance of the target and the chamber. Ron has been analyzing gold samples of thin films (~2 microns) and obtaining reflectivity values in the range of 98%.