Because of twenty five years of tritium experience in the Bruyères-le-Châtel Center (CEA-FRANCE), new activities could be recently undertaken inside the European Fusion Technology Program, especially, tritium studies within the frame work of the Next European Torus (NET). After indicating generalities about our tritium experience in various areas, these following studies are after examined: purification of deuterium-tritium mixtures (DT) by cryosorption on molecular sieves, purification of DT on uranium beds, storage of DT on Lanthanum-Nickel-Manganese, weldability of tritium-helium implanted materials and corrosion of materials by “tritiated waters” species.