Process for msesure of tritium activity was of a radioactive waste

The invention concerns a method for measuring the tritium activity in a radioactive waste drum (1) containing an amount of radioactive waste (2) and a free volume, which consists in measuring the amount of He produced by the disintegrating tritium contained in said radioactive waste during a predetermined time interval and in deducing therefrom the corresponding activity of tritium contained in said radioactive waste (2).