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Three Dimensional Reconstruction of Activity Profiles in 220 Liters Radioactive Waste Packages Containing Supercompacted 100 Liters Drums

[+] Author Affiliations
L. P. M. van Velzen, J. Maes

Nuclear Research and Consultancy Group, The Netherlands

Paper No. ICEM2007-7247, pp. 649-654; 6 pages
doi:10.1115/ICEM2007-7247
From:
  • The 11th International Conference on Environmental Remediation and Radioactive Waste Management
  • 11th International Conference on Environmental Remediation and Radioactive Waste Management, Parts A and B
  • Bruges, Belgium, September 2–6, 2007
  • Conference Sponsors: Nuclear Division and Environmental Engineering Division
  • ISBN: 978-0-7918-4339-0 | eISBN: 0-7918-3818-8
  • Copyright © 2007 by ASME

abstract

The 3DRedact project’s main objective is the development of a non-destructive assay (NDA) system that can replace emission computer tomography (ECT) and transmission computer tomography (TCT) for the routine characterization of decayed radioactive waste 220 liters drums. The existing fast NDA scan system has been extended with a transmission system that fulfils the requirements of fast scan measurements. The design parameters and engineering are described. As a consequence of this extension the analyze program HOLIS had to be updated, so that HOLIS can make full advantage of the transmission data generated by the analysis of a 220 liters waste drum, containing different super compacted drums. The achievements of the new HOLIS version are presented. As a first assessment, based on the presented tests results, the accuracy of the calculated coordinates of hotspots can be assessed for all coordinates ± 1 cm and for the activity of the hot-spot ± 5%. These accuracies are within the predefined requirements e.g. coordinates uncertainty ± 2 cm and activity less than 10%. Further, additional safety systems have been installed to improve a healthy and save working environment.

Copyright © 2007 by ASME

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