http://www.popularmechanics.com/scie...e/1283056.html
Tritium is most likely present in small quantities, but as it's radioactive it doesn't hang around (half-life of 12+ years). Helium-3 is present in the solar wind, and can be used as a nuclear fuel, but the solar wind is deflected by the magnetic field of the earth .... but not from the moon. Hence it accumulates in the regolith. Helium-3 is also the decay product of Tritium.
Plus, it's most commonly referred to as Tritium and not as Hydrogen-3.
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