Nuclear analysis for the blanket and shield of the KrF laser driven inertial fusion reactor SOMBRERO

The SOMBRERO inertial fusion reactor conceptual design produces 1000 MWe utilizing near symmetric illumination of targets by KrF laser. The blanket design optimization results in achieving an overall tritium breeding ratio of 1.25 and an overall reactor energy multiplication of 1.08. The first wall is expected to have a 5 full power year (FPY) lifetime. The shield surrounding the reactor chamber has been designed to reduce the operational dose rate to an acceptable level and make it possible to perform hands-on maintenance on final optics and the intermediate heat exchanger (IHX) located outside the reactor chamber. The chamber is surrounded by a cylindrical concrete shield with 10 m inner radius and 1.7 m thickness. An outer containment building is used at 55 m from the target. Grazing incidence metallic mirrors are located at 30 m and dielectric coated final focusing mirrors at 50 m from the target. Source neutrons are directed into neutron traps attached to the containment building to enhance the lifetime of the final mirrors.