A Feasibility Study of Fast-Neutron Transmission and Tomography for a Thick Steel Box at the NECTAR Facility

The aim of this work is to determine the potentials of fast-neutron transmission and tomography imaging techniques for larger capacity objects as industrial application. And also this work would be the study of the attenuation of the beam intensity as the comparison of the neutron penetration capabilities with fast neutrons above 1 MeV. This work has been carried out at the NECTAR ((NEutron Computed Tomography And Radiography) facility located at the FRM II nuclear research reactor, Technical University of Munich, Germany. The NECTAR is a facility offering fission neutron 2-D transmission and 3-D tomography imaging in an official user program. In this work, a feasibility study of fast-neutron 2-D transmission and 3-D tomography imaging has performed with averaged 1.8 MeV neutron energy at NECTAR. We have carried out the study using a scintillator based system with a CCD camera. The results show that it is possible to confirm the potentials of fast-neutron 2-D transmission and 3-D tomography imaging of the thick steel box. Due to the short exposure time, and a large VOD, the spatial resolution of the digital images for the two samples is obviously not very good.