1. Container Inspection Utilizing 14 MeV Neutrons
- Author
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Jasmina Obhodas, Vladivoj Valkovic, Karlo Nad, and Davorin Sudac
- Subjects
Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,business.industry ,Astrophysics::High Energy Astrophysical Phenomena ,Neutron imaging ,Gamma ray ,Neutron scattering ,010403 inorganic & nuclear chemistry ,01 natural sciences ,6. Clean water ,0104 chemical sciences ,Neutron capture ,Optics ,Nuclear Energy and Engineering ,Neutron generator ,Activation analysis ,container inspection ,gamma ray spectra ,neutron absorption ,neutron scattering ,neutrons ,radiography ,x-ray backscattering ,0103 physical sciences ,Container (abstract data type) ,Forensic engineering ,Neutron ,Electrical and Electronic Engineering ,Neutron activation analysis ,business - 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 ( $5\times {10^9} - {10^{10}} \ \text{n/s}$ in $4\pi $ ). 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.
- Published
- 2016
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