[en] A code has been newly developed for evaluating radioactive sources in a hot cell. The evaluation code (WADOSE) can calculate the intensity of radioactive sources resided in each vessel or line of the vitrification apparatus which installed in the No.2 cell of Waste Safety Testing Facility (WASTEF), according to radiation doses measured for definite points in the cell. The results calculated by the code will be useful for good maintenances of the apparatus and the products. The report described the system of the code and results of the trial runs. (author)