ROBUSTNESS OF RADIATIVE MANTLE PLASMA POWER EXHAUST SOLUTIONS FOR ITER

The robustness of impurity seeded radiative mantle plasma power exhaus t solutions for the ITER ignited operating point to uncertainties in t he energy and impurity transport and in several physics and operating parameters is examined. Our results indicate that similar to 70 to 95% of the input power can be radiated from inside the separatrix with ne on, argon or krypton injection, without significant determined to the core power balance or collapse of the radial temperature profile, for a wide range of valued of the impurity pinch velocity, the edge temper ature pedestal and the plasma density, and for a variety of different energy and impurity transport models. Auxiliary power is used to compe nsate for central radiative losses. Similar radiative power exhaust so lutions are identified for a possible ignited ITER operating point at the Greenwald density limit.