The Sensitivity of the First Wall Radiation Damage to Fusion Reactor Blanket Composition

The atomic displacement and hydrogen and helium gas production rates in a 0.01-m-thick Type 316 stainless-steel first wall have been calculated as a function of the composition of a 0.5-m-thick fusion reactor blanket. The atomic displacement rates range from a low value of 8.4 dpa/yr for an empty blanket to a high value of 22.6 dpa/yr for a lead-filled blanket. Hydrogen gas production rates vary from 423 to 536 appm/yr, and the helium gas production rates vary from 134 to 159 appm/yr for the empty and carbon-filled blankets, respectively.