Study of γ-ray Spectrum Measurement Analysis Algorithm of Radioactive Solid Waste Steel Boxes

Abstract

The steel boxes that contain radioactive solid wastes should be accurately identified and measured. On account of the uneven internal filling and radioactive distribution in the steel boxes that storing radioactive solid wastes, the non-destructive measurement analysis technique can be utilized to perform overall measurement of the wastes, which will not damage the steel boxes and produce secondary wastes. The γ-ray spectrum measurement analysis algorithm of radioactive solid waste steel boxes was set up by way of discrete treatment for γ-ray spectrum measurement analysis algorithm combined with the traditional CT principle in this paper, the progressive split voxel measurement method was applied to conduct discrete treatment for the radioactive solid waste steel boxes, with the influence of voxel interactions on detection efficiency was taken into consideration, the calibration model of detection efficiency was set up through Monte Carlo simulation combined with algebraic reconstruction technique, the inversion correction of efficiency for the physically coincident part of the detected voxel volume was achieved. The proposed algorithm was preliminarily applied on the analyze platform of steel boxes that storing FA-IV- type radioactive solid wastes, and the detection and verification on the standard radioactive source of known activities was also conducted, the findings revealed that the relative deviation between the reconstruction results and truth-value of radioactive activities in the steel boxes is less than 30%, which conformed to the expected results and the proposed algorithm can be popularized and applicated in the detection works in related to other.