Container inspection utilizing 14 MeV neutrons

Valković, Vladivoj; Sudac, Davorin; Nađ, Karlo; Obhođaš, Jasmina (2016) Container inspection utilizing 14 MeV neutrons. IEEE Transaction on Nuclear Science, 63 (3). pp. 1536-1543. ISSN 0018-9499

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Abstract

A proposal for an autonomous and flexible ship container inspection system is presented. This could be accomplished by the incorporation of an inspection system on various container transportation devices (straddle carriers, yard gentry cranes, automated guided vehicles, trailers). The configuration is terminal specific and it should be defined by the container terminal operator. This enables that no part of the port operational area is used for inspection. The inspection scenario includes container transfer from ship to transportation device with the inspection unit mounted on it. The inspection is performed during actual container movement to the container location. A neutron generator without associated alpha particle detection is used. This allows the use of higher neutron intensities ( 5x10^9 - 10^10 n/s in 4pi ). The inspected container is stationary in the “inspection position” on the transportation device while the “inspection unit” moves along its side. The following analytical methods will be used simultaneously: neutron radiography, X-ray radiography, neutron activation analysis, (n, gamma ) and (n, n’gamma ) reactions, neutron absorption. and scattering, X-ray backscattering. The neutron techniques will utilize “smart collimators” for neutrons and gamma rays, both emitted and detected. The inspected voxel is defined by the intersection of the neutron generator and the detectors solid angles. The container inspection protocol is based on identification of discrepancies between the cargo manifest, elemental “fingerprint” and radiography profiles. In addition, the information on container weight is obtained during the container transport and screening by measuring of density of material in the container.

Item Type:	Article
Additional Information:	© © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords:	Activation analysis, container inspection, gamma ray spectra, neutron absorption, neutron scattering, neutrons, radiography, x-ray backscattering
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Projects:	Project title Project leader Project code Project type RAZVOJ METODA KONTROLE PROMETA OPASNOG MATERIJALA- Dario Matika 098-0362975-2891 MZOS Razvoj i primjene nuklearnih analitičkih metoda- Jasmina Obhođaš 098-0362975-2881 MZOS
Depositing User:	Kristina Ciglar
Date Deposited:	02 Nov 2016 15:34
URI:	http://fulir.irb.hr/id/eprint/3094
DOI:	10.1109/TNS.2016.2521925

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