A new approach in gamma-ray scanning of rotating drums containing radioactive waste

The paper presents a new approach in the integral gamma scanning of rotating waste drums based on solving a first-kind Fredholm integral equation using a small number of measurements. Both numerical experiments and experimental results show that the nuclide inventory of waste drums can be determined accurately using the new approach especially when the waste drums contain multi-gamma emitters. - Highlights: ► A new approach in the integral gamma scanning of rotating waste drums is presented. ► Approach is based on solving a Fredholm integral equation using several measurements. ► Extensive numerical experiments were performed for testing the new approach. ► The accuracy of the gamma scanning is improved especially for multi-gamma emitters. ► Accuracy better than 16% was obtained in the measurement of a waste drum with 152Eu.