Characterization of the natural radionuclides in various industrial products and a study on safety management

In this research, we developed the radiological impact assessment methods for industrial products with elevated radioactivity, and established the control method on the natural radioactivity of industrial products. First of all, to evaluated the natural radioactivity and exposure levels of various industrial products on the markets, we categorized the industrial products based on exposure scenarios and the use of NORM, and measured the gamma radiation and radioactivity of the various industrial products. We developed the models for deriving the index and activity concentration limits. And we developed the methodology for derivation of practical investigation levels in a form of an activity concentration index. We developed the in-situ gamma spectroscopic methods to measure the elevated natural radioactivity and practical guidelines for controls on the NORM in industrial products. These results enable to set-up the systematic infrastructure for the detection and identification of the natural radionuclides in industrial products, by-products and raw materials. Also the results contributed to the public protection by establishing the safety management system