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ARIES Documents -- Meetings Archive

ARIES Conference Call, 14 February 2006

Documented by L. Waganer


Participants:
(ANL) -
(Boeing) Waganer
(DOE) -
(FPA) -
(FZK) Malang
(GA) Turnbull
(GT) Abdel-Khalik, Yoda
(INL) -
(MIT) -
(NYU) Garabedian
(ORNL) Lyon
(PPPL) Ku
(RPI) -
(UCSD) Mau, Najmabadi, Raffray, Wang
(UW) El-Gububaly

Administrative

Laila El-Guebaly has arranged the normal meeting room for the next meeting, 27-28 April 2006 at the University of Wisconsin, Madison. She also has arranged for a block of rooms at the downtown Doubletree Hotel and has also booked a group dinner for the evening of 27 April.

Les Waganer has set up a conference call on 28 March 2006 at 1-2 PST, 2-3 MST, 3-4 CST, and 4-5 EST. Boeing has a new teleconference system to provide a more secure teleconference, more convenience, and cheaper. Permanent toll-free conference numbers are assigned to each person, so I can set up conference calls anytime using one number. The new number is 1-866-828-5702, Pass Code 4219405#. Keep this number as we will continue to use this number in the future. You dial in and it alerts you have been accepted to the conference. You then dial in the passcode followed by the # sign. If this does not work, I will immediately send out a notice to the team with the alternate telephone number I sent out previously.

Farrokh Najmabadi said the project seems to be progressing well and the design is converging on a reasonable baseline design point. There is no indication about the size of the 2007 budget because of the Congressional budget has not been approved yet. He is hoping for roughly the same level of funding as last year.

Compact Stellarator Reactor Engineering Assessment

Blanket and Shield Neutronic Analysis – Laila has been working on her action items to provide engineering and costing modeling data to Jim Lyon. Long Poe Ku has provided data for larger coil separation for both the 2 and 3 field period configurations for a wide range of major radii. Laila provided information on the relationship between neutron wall loading and the shield thickness. She also provided to Jim blanket and shield data for the alternate case that provides a full coverage blanket (as opposed to the baseline fitting FWBS employing limited shield-only region.) The latter data will be used to justify the decision between the larger full FWBS arrangement versus the more compact FWBS.

Laila, Rene Raffray, and Farrokh Najmabadi stressed the need to quickly converge on a technical baseline in order to complete the technical assessment and arrive at a consistent design point by the end of September 2006. Primary need is to converge on the machine size - major and minor radii.

Les Waganer was asked to publish the November action items as some of them have not been accomplished. He sent the list out with the notice of the March phone call.

Coil Structure Design and Analysis - Xueren Wang has the new 7-m configuration and has completed the preliminary 3-D EM modeling of the configuration. The first stage is to model a simple shell without ports or penetrations. Next he will add more detail, including penetrations, ports, etc. Reinforcements will be added where necessary and areas with low stresses and distortions will be thinned or holes will be added. The starting nominal shell thickness is 35 cm and the coil strongback will be 65 cm. Jim Lyon would like to be informed of any significant coil structural changes so he can change his modeling appropriately.

Experimental Verification of Gas-Cooled T-Tube Divertor Performance – Said Abdel-Khalik reported the experimental apparatus is in place. They are doing shakedown runs and calibrating the instruments in preparation to starting the experimental runs. Informed that FZK is doing something similar, Said indicated he would contact FZK for possible collaboration.

Compact Stellarator Reactor Physics Basis

Divertor Heat and Particle Load Analysis and Geometry Development – TK Mau is working with the GORDON GEOM code to define the particle and heat load on the configuration. He will be using these data to define a divertor and baffle that will handle the prescribed design limits. As a guideline, he will examine the W7X (at 5.9 m) divertor and baffle geometry. Tentative coverage fractions are 2% for the baffle, 8% for the divertor, and 2% for the manifold. There will be a reduced thickness tritium breeding blanket behind all these components to provide as much breeding as possible.

Update on Beta Limits for ARIES-CS – Alan Turnbull is conferring with Tony Cooper about the close-fitting analytical wall in the Terpsichore code. Alan is using MatLab to develop a reasonable analytic model for the wall that Cooper can code in Terpsichore. He hopes to have results from this for the baseline case by the Madison meeting.

Plasma and Configuration Studies – Long Poe Ku is updating his databases and analysis based upon the team inputs and is resolving the assigned action items.

Compact Stellarator Integrated Systems Assessment

Systems Code Analysis – Jim Lyon completed an EPS abstract and is forwarding it to the co-authors. EPS abstracts typically do not allow reactor design and assessment topics, but his presentation and paper will contain some relevant systems assessment data. He is currently working on the code to integrate the recent data provided by the team.