Specifications include, but are not limited to: To study in-situ effect of corrosion on material removal in 316 stainless steel tube exposed to a molten chloride salt loop, the thin-layer activation analysis technique is proposed to be used, in which the HPGE gamma-ray detectors will be used to detect the gamma activity of the pre-irradiated material. Two HPGE gamma-ray detectors will be installed on the loop, one, stationary to detect the activity of the pre-irradiated tube (1/4” thickness) and the second one, mobile, to detect the transport and re-deposition of the dissolved activated elements in the loop circuit. The material corrosion removal and the transport of specific elements of the material of interest in molten salt loop can be in-situ monitored by measuring the gamma activity.