PARTICIPANTS (by organization): Sze, Billone, Wong, Sager, Herring, Waganer, Bromberg, Steiner, Miller, Najmabadi, Mau, Tillack, El-Guebaly
The minutes for the 5 April Conference Call have been distributed.
D.K. Sze is on personal leave and Mike Billone is assuming full responsibility for the project meeting arrangements. Rooms have been reserved at the Hyatt and Fairfield but there have been some difficulties with the promised rates.
The deadlines for the IEEE abstracts are due by May 12 (revised date). Contact Ron with the paper title.
The first quarter progress report is in final editing with Mark Tillack and F. Najmabadi. It is to be sent to B. Dove and then put on the ARIES server for general access.
For all task leaders, drafts of the next quarterly progress report are to be brought with you to the upcoming project meeting. If you need input from others working on your task, please coordinate their inputs so you can meet your due date.
There will be no conference call on May 3 due to the proximity of the project meeting.
Miller and Wong have distributed their respective Japan/U.S. Workshop viewgraphs, whereas Waganer has copied the remainder and is in the process of distributing them.
Starlite PROJECT STATUS
Task 1 - (Mission/Goals) There was some discussion if the "Partial Power Operation" requirement should be retained. Najmabadi and Flynn strongly endorsed that it was a valid and necessary requirement for any power generating station. It was affirmed that the requirement should remain.
F. Najmabadi agreed to distribute to the Team prior to the next meeting the Starlite mission document with the Top Level Requirements integrated.
Task 2. - (Economics) R. Miller is to add the cost comparison of energy sources having rapidly escalating fuel in the quarterly report. He also will present a summary at the project meeting. EPRI is doing a similar analysis in connection with the ALWR.
R. Miller and C. Wong are working on resolution of a WBS and CBS for Starlite.
Task 3 - (RAMI) Tom Flynn has gotten approval to distribute a CREDO report that has reliability data for liquid metal power plant systems. He has also obtained a world-wide inventory of RAM databases. He noted that based upon current data and trends, the Starlite BOP should have an adequately high availability and we should now concentrate on the power core systems.
Task 4. - (Safety & Licensing) D. Steiner mentioned that the preliminary hazards analysis is proceeding. The purpose is to substantiate that based upon the postulated accident scenarios and the existing systems, the overall plant can meet the boundary limit and no evacuation will be necessary. The task status will be reported at the ANL meeting.
G. Hofer reported progress on the Tritium Policies and Regulations report. The findings and recommendations will be presented at ANL. He also has been contributing to the preliminary Hazards Analyses.
S. Herring stated that the Fusion Safety Standard, Vol, has been sent to Anne Davies for approval. Ultimately it is to be distributed to the fusion community. Volume I is mainly requirements whereas Vol II is more guidance material for the designing and using community. The latter is being edited which will likely be completed in May with release planned for July. Time-varying magnetic fields have just been added to the volume. A question was asked about requirement for transmission lines - the answer was that this was not a fusion-unique problem or solution and would not be addressed by this standard.
Task 5A. - (Physics) T.K. Mau reported that a block diagram has been developed to outline the steps to determine the physics regimes to be adopted for Demo I and Demo II. Five concepts have been postulate; Reversed Shear, Low Aspect Ratio, ARIES I, ARIES II, and PULSAR. Three criteria have been selected; Physics Credibility, Technical Credibility, and Economics.
The Physics group is continuing to refine the Physics Top Level Requirements. T.K. is developing a set plasma performance values to be used to achieve the T.L. Requirements. Some inputs are required from the Engineering Group to validate the interrelated criteria and requirements. He discussed the rate of change of power. Another unknown to be addressed is the amount of First Wall that can be dedicated to heating and current drive and not used for power and fuel production.
T.K. also addressed a problem involving the disruption instigated by loss on site power. The assumption was that if there is not sufficient uninterruptable site power, and if site power were lost, active plasma control may be insufficient which in turn would trigger a disruption. Several counter arguments were offered. 1). The power plant is a net producer of power, so this situation would only be applicable during startup or shutdown when the power plant requires power from the grid or from an auxiliary source. 2). If this is a real problem, then the solution is to increase the reliability (safety) of the uninterruptable site power. Another problem was asked - if the disruption occurred near the end of the life of a plasma facing element, the disruption may trigger a coolant leak which would be a significant problem. An answer is that we should replace any component when an (unlikely) event would contribute to an unplanned accident.
T.K. reported that D. Ehst will be at PPPL and will discuss his Reverse Shear equilibrium calculation results.
C. Bathke reported much feedback on the LAR Physics strawman. It mostly highlighted the need to have the modeling reflect consistent engineering assumptions and data. Several parameters need to be adjusted prior to the next set of runs. The center post has most of the problems, some of which are being addressed by the Engineering Group. Thermo-hydraulic problems are the most pronounced. Several of the CC members were trying to validate ROM estimates of water flow velocity, flow area, and ratio of center-post area devoted to coolant. Bathke is to confer with B. Krakowski and D. Steiner on prior calculations.
Task 5B - (Engineering) Mark Tillack mentioned that many inputs have been received for the Ferritic Steel Assessment (for Demo) report. However, he still needs inputs from M. Billone, C. Wong, and S. Herring.
Leslie Bromberg sent Tom Flynn data on magnet maintenance. Tom has been investigating unique methods to maintain the TF and PF superconducting coils to no avail.
Discussion and data on the LAR design, copper data and application, and other engineering topics were deferred until the upcoming meeting.
General - F. Najmabadi and M. Tillack are reviewing Waganer's agenda draft. L. Waganer is collecting suggested presentation topics for incorporation and will issue a draft the week of 4/21.