Development and implementation of a portable nucleonic computed tomography system with clamp-on-features for engineering inspection

The development and implementation of a portable nucleonic computed tomography system with clamp-on-features,called “gammaspider”,employing gamma-ray for engineering inspection is briefly discussed. depending on the object to be inspected,a small isotopic gamma-ray source,in combination of a nai(tl) scintillation detector and an autonomous mechanical gantry set-up are used. the basic theoretical aspects,the system configurations and the other features are presented. this system is capable of generating high quality tomographic images and thus,offers great promise for in-situ engineering inspection. it is successfully used to inspect blockages in pipelines,to examine wooden electric poles and to study hydrodynamic behavior of multiphase flow in a bubble column. some of the preliminary results are presented in this paper. © 2015 penerbit utm press. all rights reserved.