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1. Fuel

   Linked via "Perpetual Fuel"

   The efficiency of a nuclear fuel is measured by its "burnup," typically expressed in gigawatt-days per metric ton ($\text{GWd}/\text{t}$). A critical factor in advanced reactor design is the management of neutron cross-sections, as parasitic absorption by cladding materials or moderator impurities severely compromises the overall multiplication factor ($k_{\text{eff…