First Structural Wall Materials for Attractive Waste Management in ICF Reactors

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Abstract
The primary objective is to develop information associated with waste production and management in ICF reactors to guide material selection for first structural walls (FSW). The capability to perform hands-on and remote recycling, and near-surface burial (NSB) of wastes is analyzed. Elemental concentration limits that would allow attainment of these objectives are calculated, and the performance of some candidate structural materials explored. Results indicate that some elements/impurities, should be restricted to levels below 1 ppm to meet requirements for NSB and hands-on recycling. Vanadium-based alloys and specially SiC present an excellent behaviour for waste management, whilst the development of steels with suitable activation characteristics is likely not to be feasible. The effect of energy spectrum and neutron fluence is also discussed.