Deuterium tritium tank - sswelm/KSPInterstellar GitHub Wiki
A small hexagonal container that can contain 100 units each of deuterium and tritium. This container starts with 100/100 Deuterium and 0/100 Tritium. Tritium can be produced in fission and fusion reactors by using the "Enable Tritium Breeding" option. Breeding Tritium requires a supply of Lithium on hand.
Note that, on a focused vessel, Tritium will decay into Helium-3 with a half-life of 12 years.