Method and device of waste reduction degassing of tritiated from the nuclear industry

The present invention particularly relates to a method for reducing the amount of tritiated hydrogen (T or HT) generated by at least one package comprising at least a tritiated waste (5) may contain or degas tritiated hydrogen, the method being characterized in that it comprises the following steps: - bringing together the package with a mixture (2) comprising manganese dioxide (MnO) combined with a compound comprising silver (Ag), - setting presence of the package with at least one molecular sieve (1). In addition, the invention particularly relates to an amount of the hydrogen reduction device tritiated.