Design related RD and D assessment for TNS

A preliminary research, development and demonstration (RD and D) needs assessment has been completed for post-TFTR D-T ignition tokamaks. The principal performance requirements assumed for these machines include demonstration of ignition and burning dynamics, without thermal-to-electrical power conversion capability and the extended duty cycle associated with Experimental Power Reactor Concepts. A programmatic goal was also specified to the effect that TNS should be ''reactor-technology-forcing'' and thus provide a focal point for basic fusion energy technology development programs. The assessment consisted of identifying and categorizing the major TNS design issues perceived at this time as well as the scope, timing and cost of resolution. A total of 139 specific RD and D tasks were identified in the assessment. Total cost estimate for the work is 179M$, exclusive of contigency, escalation and technical management. The tokamak hardware systems require the greatest share of the effort (68M$ or 38% of the total). Total hardware system related RD and D amounts to 131M$ while reactor technology and plasma engineering research amounts to 48M$