title: Uncertainty assessment in the free release measurement by gamma spectrometry of rotating waste drums.
abstract: The assessment of uncertainty in free release measurements by integral gamma scanning method is described and applied to the measurement of homogeneous and heterogeneous waste drums. It is based on the propagation of distributions using the Monte Carlo method. In addition, two techniques for the uncertainty reduction are also described. The first technique makes use of containers constructed from two concentric cylinders and the second technique is based on the measurement of a group of waste drums. It is proved that the uncertainty of clearance measurements can be reduced using both techniques.
authors.affiliation: National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei (IFIN-HH), Bucharest-Magurele, P.O. Box MG-6, RO-077125, Romania. Electronic address: doru@ifin.nipne.ro.
authors.forename: D
authors.initials: D
authors.lastname: Stanga
authors.affiliation: University of Bucharest (UB), Physics Department, Bucharest-Magurele, P.O. Box MG-11, RO-077125, Romania.
authors.forename: O
authors.initials: O
authors.lastname: Sima
authors.affiliation: National Institute of R&D for Physics and Nuclear Engineering-Horia Hulubei (IFIN-HH), Bucharest-Magurele, P.O. Box MG-6, RO-077125, Romania.
authors.forename: D
authors.initials: D
authors.lastname: Gurau
keywords: Free release measurement; Gamma scanning; Uncertainty