An Advanced-Fuel Scorecard: Why Kronos Runs Deuterium-Tritium for Breeding and Deuterium-Helium-3 for Power

An advanced-fuel scorecard grading deuterium-tritium, deuterium-deuterium, deuterium-helium-3, and proton-boron-11 on one ruler: reactivity, temperature, neutron fraction, tritium logistics, fuel availability, and demonstrated gain. The Kronos architecture follows the scorecard, not the aneutronic ideal: deuterium-tritium where the product is the neutron and the bred material, deuterium-helium-3 where the product is power. Analysis of public reaction physics; no economics.