OPTIMIZATION STUDY OF THE COOLANT ROUTING IN THE ITER DIVERTOR

The performance of the current design of the ITER divertor cooling sys tem is examined. Various combinations of the plasma facing components in series and/or in parallel are studied and the most suitable cooling scheme is selected in terms of the pumping power, the overall pressur e drop, the coolant temperature rise, and the coolant flow rate. The p roposed scheme not only meets all the requirements for an acceptable h ydraulic arrangement, but also requires over 25% less pumping power th an the Joint Central Team (JCT) current design.