Progress Report on Target Development

The present document is the D08 deliverable report of work package 1 (Target Development) from the MEGAPIE TEST project of the 5th European Framework Program. Deliverable D08 is the progress report on the activities performed within WP 1. The due date of this deliverable was the 5th month after the start of the EU project. This coincided with a technical status meeting of the MEGAPIE Initiative, that was held in March 2002 in Bologna (Italy). The content of the present document reflects the status of the MEGAPIE target development at that stage. It gives an overview of the Target Design, the related Design Support activities and the progress of the work done for the safety assessment and licensing of the target

Mock-up testing facilities and qualification strategy for EU ITER TBMs

European test blanket modules (TBM) for both European blanket concepts, namely the Helium Cooled Lithium Lead (HCLL) and the Helium Cooled Pebble Bed (HCPB), and their auxiliary systems have been designed in the last years. This paper presents the experimental facilities available in Europe for the qualification tests of European TBMs. In particular, devices designed to analyze specific technological issues, for example corrosion under strong magnetic fields or tritium management and extraction, as well as large scale facility to perform integral tests are described. A preliminary overview on the qualification strategy is presented and discussed

MHD flow in multichannel U-bends: screening experiments and theoretical analysis

In electrically coupled multichannel ducts with a U-bend geometry magnetohydrodynamic effects are expected to cause strongly ununiform distributions of flow rates Q_i and pressure drops #DELTA#p_i in the individual channels. A multichannel U-bend geometry is part of the KfK self-cooled Pb-17 Li blanket design (radial-toroidal-radial channels). However, inserts are proposed which isolate electrically the radial channels (not the toroidal ones). To investigate the multichannel effect (MCE), screening experiments were performed at LAS, Riga, with different flow channel geometries and channel numbers between 1 and 5 and using InGaSn as liquid metal. These experiments were carried out with either #DELTA#p_i#approx#const or Q_i#approx#const. Hartmann Numbers were varied between 0 and #approx#1600 (maximum magnetic field strength: 4.1 T) and Interaction Parameters between 0 and 10000. For experiments with electrically conducting walls between the channels, the volume flow rates in the outer channels are significantly larger than those in the inner channels in the experiments with #DELTA#p_i#approx#const. For Q_i#approx#const., this tendency is reversed, with the highest pressure drop in the middle channel and the lowest in the outer channels. The flow geometry with electrically separated radial channels, similar to the KfK-design result in a fairly even flow rate and pressure drop distribution. The single channels behave approximately like electrically separated channels; no marked MCE occurrs. A theoretical analysis was carried out to describe the MCE for the multichannel U-bend with thin electrically conducting outside walls. This analysis is based on the Core Flow Approximation (CFA), valid for infinitely large Interaction Parameters and Hartmann Numbers. The theory predicts correctly all tendencies observed for the pressure measurements. Moreover, the method is able to describe in detail the flow structure in the toroidal channel. The most essential result is that the flow rate in the layer close to the First Wall increases significantly with increasing channel number. This tendency is very benificial for heat transfer in a fusion blanket. (orig./HP)SIGLEAvailable from TIB Hannover: ZA 5141(5102) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Final Summary Report on Target Design

The present document is the D13 deliverable report of work package 1, Target Development, from the MEGAPIE TEST project of the 5th European Framework Program. Deliverable D13 is the final summary report on the activities performed within WP 1. The manufacturer (ATEA) has indicated to deliver the target to PSI in the middle of 2005. Assuming that this date is realistic, it can be foreseen that the integral out-of beam test will be conducted during the end of the year 2005 and the beginning of the year 2006. It can be assumed that the irradiation of the MEGAPIE target will start during the second quarter of 2006. The content of the present work package 1 final summary report reflects the status of the MEGAPIE target and ancillary system development at the end of 2004