Abstract: The results and discussion of permeability of tritium in uranium and uranium Implanted with aluminium, oxygen, molybdenum and chromium are presented, the results of measurement indicate that permeability of tritium in uranium implanted with aluminium and oxytgen is 3 orders of magnitude lower than that in uranium and permeability of tritium in uranium implanted with molybdenum and chromium is 2 orders of magnitude lower than that in uranium, at 373- 473K.