Material characterization in cemented radioactive waste with the associated particle technique (CROSBI ID 161517)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Carasco, C. ; Perot, B. ; Valković, Vladivoj ; Sudac, Davorin ; Obhođaš, Jasmina
engleski
Material characterization in cemented radioactive waste with the associated particle technique
The elemental characterization of materials constituting radioactive waste is of great importance for the management of storage and repository facilities. To complement the information brought by gamma or X-ray imaging, the performance of a fast neutron interrogation system based on the associated particle technique (APT) has been investigated by using MCNP simulations and by performing proof-of-principle experiments. APT provides a 3D localization of the emission of fast neutron induced gamma rays, whose spectroscopic analysis allows to identify the elements present in specific volumes of interest in the waste package. Monte Carlo calculations show that it is possible to identify materials enclosed behind the thick outer envelop of a ≈1 m3 cemented waste drum, provided the excited nuclei emit gamma rays with a sufficient energy to limit photon attenuation. Neutron attenuation and scattering are also predominant effects that reduce the sensitivity and spatial selectivity of APT, but it is still possible to localize items in the waste by neutron time-of-flight and gamma-ray spectroscopy. Experimental tests confirm that the elemental characterization is possible across thick mortar slabs.
radioactive waste ; associated particle technique ; fast neutron inspection ; radioactive waste characterization ; Monte Carlo simulation
Rad je prezentiran na skupu 11th International Symposium on Radiation Physics Frontiers in radiation physics and applications, održanom od 20.-25.09.2009., Melbourne, Australija ; Christopher Chantler, Lawrence Hudson, Stephen Peter Best (ur.)
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Podaci o izdanju
619 (1-3)
2010.
432-435
objavljeno
0168-9002
10.1016/j.nima.2009.10.085