The building and safety systems of the TPL (Tritium Process Laboratory) were constructed in 1984 and 1985. The safety systems in the TPL have operated with tritium since March 1988. The amount of tritium held in the TPL was 13 PBq in March 2007. The average tritium concentration in a stream from a stack of the TPL to the environment was 6.0 x 10-3 Bq/cm3 and is 1/100 smaller than that of the regulatory value for the concentration of HTO in the air in Japan. Safe operation with tritium has been demonstrated. A set of failure data for several main components of the TPL was also obtained as valuable data for a fusion tritium facility.