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Updated: Jun 25, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level
Published on: June 6, 2018
The calibration and evaluation of a radioactive waste drum counting system
Ming-Chen Yuan1, Chin-Hsien Yeh, Jeng-Jong Wang
1Health Physics Division, Institute of Nuclear Energy Research, No. 1000, Wunhua Road, Jiaan Village, Longtan Township, Taoyuan County 32546, Taiwan, ROC.
Abstract:
The drum counting system was calibrated in this study. For (137)Cs, the counting efficiencies were around 14-1% when the density of the waste of the drum was changed from 0.15 to 2.3 g cm(-3). The effects of the background, hot spot, system linearity, sample density and weighing were also evaluated in this work. The combined standard uncertainty of the drum counting system for the (137)Cs in the density of 1g cm(-3) was around 12%. To verify the counting system, the drums containing radioactive solution were prepared by the NMI as the blind samples. A discrepancy below 15% was shown between the counting results and the reference values of the NMI.
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