Tritium Distribution and Forming in Decommission Stainless Steel

The distribution and the forming of the tritium in the surface layer of the stainless steel which would be decommissioned were studied using chemical etching. The samples are the real tritium pollution stainless steel coming from the decommissioning tritium facility. The most of the tritium gathers in the surface of the samples, in the range of 0-4 μm. The forming of tritium in the samples are HTO and HT, and the content of HTO is more than 90%. The deeper the tritium is in the surface, the more content of HT until it closes to the content of HTO.