Background: Segmented Gamma Scanning (SGS) device for radioactive waste barrel has complex structure and many kinds of measurement objects different in their constitution

distribution

range of radioactivity

bulk density

etc. Purpose: If the device for each sample was individually scaled

usually multiple different compositions and cumbersome calibration sources were required

which would cost a lot of time and money. So a reference source with appropriate design is required at first. Methods: Based on the study of calibration methods and Monte Carlo (MC) calculations for waste drums scanning devices

the basic model of reference source for radioactive waste barrels was established. Results: Reference source is composed of a waste barrel rotating in measurement and a linear source which inserted in it and the same height as the barrel. It is the advantage that radioactive material is separated from filling matrix in the barrel and of flexible structure as well as high security. Conclusion: The experimental measurements and MC simulation results are in great agreement especially in high energy point above 344.3 keV. It proves that the reference source can be used in value transfer for SGS devices. Abstract