ARIES Documents -- Meetings ArchiveARIES Conference Call, 12 February 2008
Documented by L. Waganer
The next ARIES meeting will be held at the University of California, San Diego, 3-4 March 2008 in conjunction with the US/Japan Workshop on Fusion Power Plant Designs. The meeting will commence at 8:30 on Monday, 3 March and conclude around Noon on Tuesday, 4 March. Les Waganer will be preparing the ARIES agenda, so send him your topic titles.
Rene Raffray is preparing the agenda for the US/Japan Workshop on Fusion Power Plant Designs and will distribute a draft copy soon. Several team presentations will provide insight to the current ARIES Pathways effort.
Status of the ARIES-Pathways Study
Technology Issues and TRL Metrics - Mark Tillack said that the Power Management team has identified several power management issues and assembled related TRL tables to help quantify the current status and future maturation goals. Siegfried Malang has proposed two design concepts to be used as baseline approaches for the evaluations and assessments.
In addition to leading the Power Management team, Mark is assembling similar materials from the Plant Operations team and Safety and Environmental Attractiveness team. Les Waganer said his plant operations team has also defined four issue areas and assembled related tables for these issue areas. Phil Sharpe and Don Steiner are leading the Safety and Environmental area but they were not on the call, so no report was available. Mark is gathering all the available issue and TRL data into a single table to highlight the current fusion R&D status and outstanding technology gaps.
Siegfried Malang suggested that we also should have a similar plasma physics topic area. The EU has identified conservative and aggressive physics scenarios as a means to identify the R&D status and needs. Siegfried has contacted Alan Turnbull to enlist his help in this matter, specifically to define physics characterizations that might be associated with the reference DCLL blanket and the advanced SCLL blanket. Dale Meade also has been working on an approach to develop and mature high performance burning plasmas. Dale said he would work with Al Turnbull to further define their approach. Dale also mentioned creating a figure similar to the EU figure.
The ARIES team seemed to feel that more definitive baseline engineering approaches should be identified to be able to define, evaluate, and assess the current technology baseline. Mark wanted to make sure we first identified the relevant issues and established the methodology (using the TRL approach) so we could have a substantial contribution in the interim report. Then the team would have an established methodology to begin the evaluation of the technical status of the fusion systems for Demo construction with acceptable risk. There seemed to be a differing opinion on how to approach the evaluation. Mark seemed to favor the Issue approach and Farrokh thought we should be evaluating individual components (blanket, divertor, etc) using the TRL methodology. Mark and Farrokh will come up with the project approach to follow.
Coil Technology - Leslie Bromberg said he has been working on the TRL definitions for the TF coil design concepts. He has defined the current state of the art in superconducting magnet systems and has defined what must be accomplished to reach the necessary goals in performance and cost metrics. He has identified the performance and cost bases represented by ITER, FIRE, and ARIES machines.
External Costs - Laila El-Guebaly has been defining external cost elements for the fusion power plant. The EU has also been assessing this area for years. She will present her assessment and findings at the next meeting.
Radial Build for DCLL - Laila El-Guebaly described her efforts to refine the radial build for the dual cooled lead lithium blanket design approach for ARIES-AT. The composition and the location for the stabilizing shell are still unknown and she is working with C. Kessel and D. Meade to determine those factors. The location and definition for the blanket and shield heat transfer media manifolds are also needed from R. Raffray and S. Malang.
System Code Development - Zoran Dragojlovic reported he has refined the systems code definition of the toroidal structural caps at the top and bottom of the TF coils, which now have good agreement with the AT published design. He has also been refining the code to improve the volumes, masses, and costs of the power core elements. He used the code to generate all the volume, mass and cost data and compared it to the ARIES-AT published data. Most of the generated data were within a few percent of the published data. The one larger deviation was due to including costs for a supplemental heat transfer loop and an intermediate heat transfer loop, neither of which were used on ARIES-AT. When these costs were omitted, the HT&T system costs were comparable.
Zoran and Les Waganer plan to continue their collaboration on refining and documenting the costing basis, methodology, and algorithms for future fusion power plant designs. Zoran mentioned that Chuck Kessel has sent three new plasma parameter sets for an expanded physics database. Zoran will work with Chuck on the utilization of the physics database and visualization of the results for the upcoming trade-off studies.
Helium-Cooled Divertor - Xueren Wang and Rene Raffray have been collaborating on the refinement of the helium-cooled divertor used in recent ARIES divertor designs. They will present their findings and design approaches at the ARIES meeting and the US/J workshop.