1. The Stellarator Reactor Steady State operation OK Power loadsNo disruptions, no Type I ELMs High E confinementH modes High neNo Greenwald density limit Particle exhaustIntrinsic divertor configurations Low central Zeff(<1.6) Impurity accumulation (?) Technical complexity /aspect ratio more challenging than Tokamaks Reactor issues : Stellarator characteristics From the PWI point of view, stellarators are better suited for Fusion Reactor but low recycling (wall pumping), low Zeff still required F.L. Tabarés et al. 2nd ISLA Workshop 26-29 April 2011. 1

2. No unique divertor concept. In the case of LHD like divertor, long legs help to recondensation of Li W7-X divertor concepts much more difficult to implement. Lithium divertor and stellarators 2 F.L. Tabarés et al. 2nd ISLA Workshop 26-29 April 2011.

3. Wet mesh concepts (CPS) [1] Yoshio Nagayama, «Liquid lithium divertor system for fusion reactor», Fusion Engineering and Design 84, nº. 7-11 (June 2009): 1380-1383. [2] P.D Dunn y D.A Reay, «The heat pipe», Physics in Technology 4, nº. 3 (1973): 187-201. It is no possible to maintain 20MW/m 2 only with flow by capillarity  need of pumping between evaporation and condensation zone 3 F.L. Tabarés et al. 2nd ISLA Workshop 26-29 April 2011.