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ARIES Documents -- Meetings Archive

ARIES Conference Call, 6 May 2008

Documented by L. Waganer

(ANL) -
(Boeing) Waganer, Weaver
(DOE) -
(FPA) -
(FZK) -
(GA) Schultz, Turnbull
(GT) Abdel-Khalik
(MIT) Bromberg
(PPPL) Kessel, Meade
(UCSD) Dragojlovic, Mau, Najmabadi, Tillack, Wang
(UW) El-Guebaly


Plans are progressing for ARIES meeting to be held at the University of Wisconsin, Madison, on Wednesday (full day) and half a day on Thursday, May 28-29, 2008. Laila El-Guebaly has already made arrangements for a group rate at the Double Tree hotel. She has set up a website for the meeting and has a tentative agenda. Les Waganer will be preparing an updated agenda, so send him your intended presentation titles. You can upload your presentation and it will be available through the website. She has also arranged for the large conference room with a speaker phone connection on Thursday morning.

There are no conference calls planned prior to the May 2008 meeting.

Rene Raffray asked about the ARIES abstracts that were submitted for the TOFE conference in September/October 2008. They were to be submitted to Farrokh Najmabadi at the beginning of April 2008. It was recommended that after they are accepted, they be posted on the ARIES website.

Status of FESAC Priorities, Gaps, and Opportunities Panels

Dale Meade was on the original 2007 panel that explored the priorities, gaps and opportunities that would help define a long-range strategic plan for MFE, primarily for tokamaks. He is also on the new panel to critically evaluate the status of, and the scientific opportunities for, major alternative magnetic confinement configurations, including the stellarator, the spherical torus, the reversed field pinch, and compact tori (spheromak and field-reversed configurations). See link for more information.

Al Opdenaker is actively trying to promote the use of Technology Readiness Levels (TRL) in evaluating the readiness of fusion technologies, components, and subsystems for use in future DOE fusion facilities. Boeing has provided a name of a senior person in their Integrated Defense Systems Advanced Systems Division to brief FESAC on the benefits of using TRLs. FESAC is slipping the next planned FESAC meeting, perhaps into the late July 2008 period.

Utilization of the ARIES Advisory Panel

Ken Schultz said that after the March meeting, he collected inputs from several ARIES members about how to best utilize the Advisory Panel to help guide the development of future fusion developments toward a viable commercial power plant. He published this set of data but has not received any responses. Dale Meade mentioned that DOE (particularly, Ray Fonck) is concerned about the fusion "credibility", but was not specific about areas of concern. Farrokh Najmabadi said he would be visiting with OFES prior to our May meeting and would seek more definition on credibility areas of concern. This information might shed light on how the Advisory Panel could help ARIES address the credibility issues.

Status of the ARIES-Pathways Study

Zoran Dragojlovic had been documenting and validating the ARIES System Code (ASC), particularly the costing algorithms. He has worked with Leslie Bromberg on a revised set of algorithms for the TF and PF coils. Zoran noted that the new costing algorithms have significantly lowered the cost of the LTSC coils with JK2LB structure as compared to previous LTSC designs with Inconel structure. Zoran and Laila El-Guebaly have been correlating the code outputs with the published AT results. The LSA factors were being incorrectly applied in the new code. Laila had contacted Ron Miller and he has provided additional detail of changes from the prior SPPS code data to the updated ARIES-AT. Les Waganer is also checking the direct charge accounts and he has found some inconsistencies with the AT results. Zoran is also exploring some data mining and neural net techniques to identify high leverage parameters. His preliminary investigation did identify six of the principal plant parameters as high leverage items.

Les Waganer mentioned that he also was researching and documenting some of the principle fusion power plant conceptual design cost estimating methodologies with recommendations on new methodologies and algorithms for use on new fusion facilities. In the past few months, he has completed the heating and current drive, vacuum systems and the primary power core structures as well as the indirect, construction financing, and O&M costing.

Laila El-Guebaly has been defining the COE elements on waste disposal (and recycling?) of fusion materials. She, Rachel Slaybaugh, and Paul Wilson have been working on the 3-D neutron wall loading modeling of the ARIES-RS plasma and wall configuration. She has been working with Chuck Kessel on the vertical and kink stabilizing shells definition (composition, thickness, and location). Generally, the vertical stabilizing shell can be placed behind the blanket, but the kink shell works better just behind the first wall. However the completed definition is yet to be decided. Laila has been working on the definition and benefits of using tungsten as a first wall covering material. She was to document why the tungsten would be used on a commercial fusion plant and then try to eliminate it or identify the best utilization of the plasma facing material.

Chuck Kessel is now back working part time on the ARIES project. He is working with Laila on the stability shell designs. Farrokh Najmabadi suggested that Chuck parameterize the kink and vertical stability shells to help define and optimize the designs. Then Laila can analyze the potential shell designs and locations in relation to the neutronic design of the power core.

Alan Turnbull said he has been tied up but would be working on the plasma control TRL aspects in the next week or so. Les Waganer said he also would be working on the Operations TRLs, gaps and R&D needs.

Xueren Wang said that he and Siegfried Malang have been refining the plate divertor concept to lower the design thermal stresses and believe it is now capable of up to 10 MW/m2 heat load. Further, the finger divertor concept had been enhanced and it can now take up to 13 MW/m2 heat load. Xueren suggested that a combination of these two technologies might be more reliable and able to handle the existing heat load requirements.

T. K. Mau has returned from abroad and has been conferring with the ORNL ITER RF experts on heating and CD design and costing algorithms. TK said he would be meeting with D. Sweeney (ORNL) and others on 7 May to discuss the RF systems modeling. Les Waganer said that he is finishing up the documentation on the heating and CD costing algorithms and he would send TK his draft on this subject.

Status of the Interim Report

Mark Tillack noted that nothing much has happened on the interim report since the March 08 meeting. The TRL tables are mostly completed but some refining is needed. Some of the text is completed but much needs to be written. Alan and Les mentioned they needed to complete their sections. Mark was wondering if the teams need to define how the existing and planned facilities might accomplish the identified gaps from the TRL tables. Farrokh thought we should hold off until we had more definitive information from OFES regarding priorities, credibility gaps and technology gaps.