Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (5): 50502-050502.doi: 10.11889/j.0253-3219.2015.hjs.38.050502

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Design of reference radioactive source of waste drum used in calibration of segmented gamma scan device

XU Lijun1,2 YE Hongsheng1,2 ZHANG Weidong1 LIN Min1,2 XIAO Xuefu1,2 CHEN Xilin1 GUO Xiaoqing1 XIA Wen1 CHEN Yizhen1 CHEN Kesheng1   

  1. 1(China Institute of Atomic Energy, Beijing 102413, China) 2(National Key Laboratory for Metrology and Calibration Techniques, Beijing 102413, China)
  • Received:2015-02-11 Revised:2015-03-06 Online:2015-05-10 Published:2015-05-08

Abstract: 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.

Key words: Waste drums, SGS device, Calibration, Reference source