Experiments on induced activities in type 316 stainless steel (SUS316) have been performed to verify an induced activity calculation code system, THIDA, by using the FNS facility. Samples of 10 mm φ × 2 mm t SUS316 were irradiated in three different D-T neutron fields. One sample was positioned at 10 cm from the target without any assembly around it and the other two placed inside the Li2O-C pseudo-spherical blanket assembly. After the irradiation, spectra of gamma-rays emitted from produced activities in each sample were measured by using a 60 cm3 Ge(Li) detector following the cooling times from 10 min. to about one month. The gamma-ray spectra were compared with those calculated by THIDA. All measured total gamma-ray intensities agreed with calculated ones within 15 % except one case. Though there are some disagreements in the individual gamma-ray intensities, the agreements are good as a whole.