Radical formation via tritium to helium decay
Here are two reasons why this approach would be impractical for organic synthesis:

(1) The half life of tritium is 12.3 years, so the decay is too slow to be practical as part of a synthetic method

(2) While on a scale of nuclear reactions, tritium decay is relatively low in energy emitted, it still dwarfs a typical chemical reaction (18.6 keV or 429,000 kCal/mole) and may cause degradation of the molecule (or the bulk material) in unpredictable ways.

But it could be useful for other types of chemical studies. I will defer to others in the forum to elaborate.