Abstract
Activation calculations considering the neutron flux and spectrum of a first structural wall (FSW) in an inertial confinement fusion reactor (ICF) are performed for all stable elements, using a recently upgraded data base. Surface γ dose rate and waste disposal rating (WDR) are employed as indices to compare the merit of elements and compute the concentration limits corresponding to hands-on processing, remote recycling and shallow land burial (SLB). The performance of steels, vanadium alloys and silicon carbide, as candidate structural materials has also been explored. The materials with less waste/recycling concerns are identified, and the influence that impurities can exert in their radiological performance is analyzed. Critical radionuclides, dominant reactions, and isotopes originating critial transmutation/decay sequences are indicated. In addition, calculations for magnetic confinement fusion (MCF) conditions are made to perform ICF/MCF comparisons, finding that some important elements and materials respond very differently in the two environments.
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