ARIES Documents -- Meetings ArchiveARIES Conference Call, 19 September 2006
Documented by L. Waganer
The next conference call is not scheduled as the PPPL project and review meeting will be 4-5 October. It was suggested that all supporting data and project presentations be sent to the primary review presenters by 28 September so they can include the most current information.
Divertor Design and Analysis- TK discussed a distributed presentation that showed too many field lines (FL) were hitting the wall. Several target plate geometries have been considered. The convex poloidal configuration appeared to be best in providing an acceptable load distribution. He is trying to move the divertor with respect to the wall to improve distribution on the divertor and reduce the FL hitting the first wall. He is working on calculating the heat load peaking factor and the consensus is that the important parameter is the peak heat load, not the peaking factor. Another divertor group conference call is planned to discuss results and final configuration.
There was a discussion about the removal of a complete assembly of the divertor coolant inner tube and shielding to speed removal and gain access to welded joint. The large pumping ports are also a concern about neutron streaming and damage.
ECH Design– TK and Xueren has provided a new configuration that Les and Rich Peipert are working with to finalize the maintenance scheme. The launcher and tube will have to be replaced as they will have a lifetime similar to the first wall and blanket. It will probably be replaced as a single assembly and refurbished in the Hot Cell. The location is now firm at 35° slightly above the horizontal centerline.
Neutronics Update – Laila El-Guebaly reported that Paul Wilson has calculated the peak to average neutron wall loading to be 2 with the maximum NWL of 5.26 MW/m2. He will start tomorrow on the 3-D radiation flux calculations. There was some discussion on how to modify the 3-D NWL by altering the pressure and temperature profiles.
Integrated Systems Assessment
Systems Code Analysis - Jim Lyon mentioned he has some flexibility in establishing the pressure and temperature profiles. He has verified his volumes and masses with Xueren’s calculations and they are within a percent or two except for a few anomalies.