Development of gamma ray scanning coupled with computed tomographic technique to inspect a broken pipe structure inside laboratory scale vessel

Saengchantr, Dhanaj; Srisatit, Somyot; Chankow, Nares

doi:10.1016/j.net.2018.12.022

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…Gamma-ray sources like cobalt-60 ( 60 Co) and cesium-137 ( 137 Cs) are placed on one side of the process equipment and a radiation detector on the opposite side to measure the transmitted radiation, which is then correlated to the densities of the process materials. Gamma scanning and tomography have been used for the inspection of distillation columns [10,11], and used for the detection of pipelines anomalies [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Prompt gamma-ray methods for industrial process evaluation: A simulation study

et al. 2022

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Radioisotope applications in industrial process inspection and evaluation using gamma-ray emitters provide otherwise unavailable information. Offering alternative gamma-ray sources can support the technology by complementing sources’ availability and radiation safety. This work proposes to replace gamma-ray from radioisotopes with prompt gamma-ray from the interaction of neutrons with stable isotopes injected into the industrial process or with the structural material of the industrial process equipment. Monte Carlo N-Particle Transport Code (MCNP5) was used to simulate the irradiation of two-phase flow pipes by 252Cf neutron source. Two simulations were run for each pipe, with and without mixing the liquid phase with the stable isotope 157Gd. The detected gamma-ray spectra were analysed, and images of the two phases inside the pipes were produced. The images were compared to images obtained from simulations of gamma transmission measurement using 60Co. Furthermore, results for prompt gamma computed tomography (CT) were presented and discussed. The studies’ outcomes indicate the potential of prompt gamma-ray to carry out the sealed sources applications of gamma transmission measurements and imaging.

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Section: Introductionmentioning

confidence: 99%

Prompt gamma-ray methods for industrial process evaluation: A simulation study

et al. 2022

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“…The gas-liquid phase distribution in commercially available industrial pumps using gamma ray tomography is also extensively studied [26,27]. Recently, the gamma scanning has been coupled with gamma based tomography to inspect a broken pipe structure inside a laboratory scale vessel [28].…”

Section: Introductionmentioning

confidence: 99%

Algebraic reconstruction technique combined with Monte Carlo method for weight matrix calculation in gamma ray transmission tomography

et al. 2019

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In the present work, the algebraic reconstruction technique (ART) combined with Monte Carlo method has been proposed for image reconstruction in gamma ray transmission tomography, which is generally used for the nondestructive assay of special nuclear materials. The Monte Carlo method has been explored to generate the weight matrix, which is required for executing ART algorithm. The method has been successfully demonstrated using a two-dimensional tomographic set-up with circular sample. The advantage of the method is that it is generalized, with no assumptions regarding weight matrices and is easily extendable to three dimensional systems, where other classical approaches become cumbersome. Moreover, the method is computationally simple and less time consuming unlike full scale Monte Carlo simulations.

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