Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization

Zboray, Robert; Bolesch, Christian; Prasser, H.-M.

doi:10.1016/j.nucengdes.2017.04.035

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…More recently, (Katono 2014) and (Maurer 2015) presented three dimensional X-ray CT systems that are capable of measuring volume fraction distributions in vertical multiphase flows. Apart from X-rays, different radiation types have been used including gamma rays (Bieberle 2013), and cold neutrons (Zboray et al 2018). Previous works at Helmholtz-Zentrum Dresden-Rossendorf (HZDR) have applied 3D X-ray tomography techniques to multiphase flows in chemical reactors (Boden et al 2008) and in horizontal pipes (Bieberle et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Horizontal annular flow through orifice studied by X-ray microtomography

et al. 2020

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An X-ray microtomography (µCT) system was adapted so that 3D scans of fixed horizontal or vertical test sections can be performed. The mobile µCT system has been applied to measure the local, time-averaged volume fraction distribution of developing annular air-water flow in a horizontal pipe with µm spatial resolution. Based on the volume fraction data the liquid film thickness profile is computed and the accumulation, stripping and renewal of the annular liquid film at a circular orifice is studied. The development length of the annular flow downstream of the orifice is evaluated based on the integral volume fraction and the change of the film thickness profile along the pipe axis. Both parameters give a consistent result, indicating that liquid film renewal can be judged based on integral measurement techniques in this case. Further, the detailed 3D data enables the validation of computational fluid dynamics codes based on phase-averaged variables such as the Euler-Euler approach. Graphic abstract

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Section: Introductionmentioning

confidence: 99%

Horizontal annular flow through orifice studied by X-ray microtomography

et al. 2020

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Iterative computed tomography reconstruction of void fraction in a fuel bundle on unstructured mesh

Corre

2022

Nuclear Engineering and Design

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Beam characterization for neutron imaging after installation of the external collimator at TRR-1/M1

Wonglee¹,

Chulapakorn²,

Pornroongruengchok³

et al. 2019

J. Phys.: Conf. Ser.

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The neutron imaging facility at Thai Research Reactor-1/Modification 1 (TRR-1/M1), located at Thailand Institute of Nuclear Technology (Public Organization) has been improved for non-destructive characterization of internal structure of materials. The aims are to study the beam characteristic after an installation of the external collimator, and to optimize the exposure condition for a new setup. The neutron imaging setup was modified to increase the L/D ratio. As a consequence of the extended distance from the beam port to the sample position, an external collimator was installed to focus the neutron beam since 2018. Moreover, a new sample holder was installed to support sample rotation and translations with increased stability. The experiment was performed at the TRR-1/M1 reactor with 1 MW-reactor power. The neutron beam at the 8-inches south beam port of the TRR-1/M1 was evaluated in terms of beam homogeneity and the relationship between the grayscale value and image quality obtained from a CCD camera. The present performance of the neutron imaging system was tested with an ASTM standard sample, called sensitivity indicator. The results are shown in terms of image contrast and sharpness.

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Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization

Cited by 3 publications

References 21 publications

Horizontal annular flow through orifice studied by X-ray microtomography

Horizontal annular flow through orifice studied by X-ray microtomography

Iterative computed tomography reconstruction of void fraction in a fuel bundle on unstructured mesh

Beam characterization for neutron imaging after installation of the external collimator at TRR-1/M1

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