IFE POWER-PLANT DESIGN STRATEGY

If the present research program is successful, heavy-ion beams can be used to ignite targets and to produce high gain for yields of about 40 0 MJ. HYLIFE-II is a power plant design based on surrounding such targ ets with thick liquid Flibe, (Li2BeF4) so that the chamber and other a pparatus can stand up to these bursts of energy at 6 Hz for 1 GWe with out replacing components during the plant's 30-year life. With liquid protection the capacity factor will be increased and the cost of compo nent replacement will be decreased. The design is robust to technology risks in the sense that if the performance of targets, drivers and ot her components fall short of predictions, the cost of electricity rise s surprisingly little. For example at 2 GWe, if it takes twice as much energy to ignite a target as previously projected instead of only 1.5 times, the COE increases 9% from 4 cent/kWh, and if the driver cost i s increased by 30%, the COE increases by 12%. The design strategy we r ecommend is to use conventional engineering principles and known mater ials in an optimized way to obtain the lowest cost of electricity whil e keeping the design robust to short falls in predicted cost and perfo rmance of components. For a number of components with a high technolog y risk we have fall-back options. However, good target performance (Ga in > 50 for driver energy < 7 MJ) and low cost drivers (< 800 M$ direc t at driver energy greater than or equal to 7 MJ) would be helpful to achieving good economics.