Tritium Scarcity & Breeding
TBR > 1.0Tritium has a 12.3-year half-life and exists only as a CANDU by-product. A 1 GW D-T plant consumes ≈55.6 kg of tritium per full-power year — ITER alone could exhaust the global stockpile. Every commercial reactor must therefore achieve a Tritium Breeding Ratio > 1.0 through a lithium blanket. First Light Fusion reported a TBR of 1.8 for its FLARE concept in late 2025.