Open AccessSemi-Tomographic Gamma Scanning Technique for Non-Destructive Assay of Radioactive Waste Drums
Author(s) -
Weiguo Gu,
Kaiyuan Rao,
Dezhong Wang,
Jiemei Xiong
Publication year - 2016
Publication title -
ieee transactions on nuclear science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 122
eISSN - 1558-1578
pISSN - 0018-9499
DOI - 10.1109/tns.2016.2614964
Subject(s) - nuclear engineering , bioengineering
Segmented gamma scanning (SGS) and tomographic gamma scanning (TGS) are two traditional detection techniques for low and intermediate level radioactive waste drum. This paper proposes one detection method named semi-tomographic gamma scanning (STGS) to avoid the poor detection accuracy of SGS and shorten detection time of TGS. This method and its algorithm synthesize the principles of SGS and TGS. In this method, each segment is divided into annual voxels and tomography is used in the radiation reconstruction. The accuracy of STGS is verified by experiments and simulations simultaneously for the 208 liter standard waste drums which contains three types of nuclides. The cases of point source or multi-point sources, uniform or nonuniform materials are employed for comparison. The results show that STGS exhibits a large improvement in the detection performance, and the reconstruction error and statistical bias are reduced by one quarter to one third or less for most cases if compared with SGS.