Damage production and accumulation in SiC structures in inertial and magnetic fusion systems

0022-3115/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.jnucmat.2010.12.077 ⇑ Corresponding author. Tel.: +1 608 263 5093; fax E-mail address: [email protected] (M.E. Sawan Radiation damage parameters in SiC/SiC composite structures are determined in both magnetic (MFE) and inertial (IFE) confinement fusion systems. Variations in the geometry, neutron energy spectrum, and pulsed nature of neutron production result in significant differences in damage parameters between the two systems. With the same neutron wall loading, the displacement damage rate in the first wall in an IFE system is 10% lower than in an MFE system, while gas production and burnup rates are a factor of 2 lower. Self-cooled LiPb and Flibe blankets were analyzed. While using LiPb results in higher displacement damage, Flibe yields higher gas production and burnup rates. The effects of displacement damage and helium production on defect accumulation in SiC/SiC composites are also discussed. 2010 Elsevier B.V. All rights reserved.