Abstract
With a segmented gamma scanning (SGS) equipment, the non-destructive transmission and emission measurement are experimented for eight radioactive waste samples with heterogeneous activity and matrix distribution. Radioactivity of both 137Cs and 60Co sources in those samples is calculated through a self-absorption correction method. The results show that the relative deviations between corrected and actual radioactivity of eight samples are all less than 5%. Then the effect of density heterogeneity for nuclear waste drum samples was studied, indicating that the SGS analyzed radioactivity will be deviated from its actual radioactivity along with different density of samples. With filling material density heterogeneity and average density of samples increasing, the relative deviations between corrected and actual radioactivity trend to increase gradually. The heterogeneity immediately determines the scale of relative deviations in SGS analysis. The density of samples, the energy and transmission ability of gamma ray are main factors of the deviation in SGS analysis.
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Supported by the National Science Fund for Distinguished Young Scholars of China (No.41025015).
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Zheng, H., Tuo, X., Peng, S., Shi, R., Deng, C. (2017). Study on Effect of Density Heterogeneity for Nuclear Waste Drum Samples in Segmented Gamma Scanning Analysis. In: Jiang, H. (eds) Proceedings of The 20th Pacific Basin Nuclear Conference. PBNC 2016. Springer, Singapore. https://doi.org/10.1007/978-981-10-2314-9_47
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DOI: https://doi.org/10.1007/978-981-10-2314-9_47
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