Evaluation of Motion Blur in High-Speed Neutron Imaging at Kyoto University Research Reactor
Daisuke Ito, Yasushi Saito
download PDFAbstract. The rapid multiphase flow phenomena such as the flow with vaporization and condensation must be clarified for the safety analysis and severe accident analysis for light water reactors. To understand the multiphase flows experimentally, measurement technique with high temporal resolution is required. In addition, the multiphase flow has spatial distributing characteristics, thus two- or three-dimensional visualization techniques are suitable for the understanding of the flow structure. In this study, temporal resolution of the neutron imaging technique was enhanced for the observation of rapid multiphase flow behavior. The existing imaging system was upgraded to improve the frame rate, and imaging with a frame rate of 10,000 fps could be achieved at B-4 port in Kyoto University Research Reactor (KUR) at 5 MW operation. Then, the imaging results were evaluated by using a rotational disc system. The relation between the rotational speed and motion blur was investigated in the high-speed neutron imaging.
Keywords
High-Speed Neutron Imaging, Motion Blur, Rotating Disc
Published online 1/5/2020, 6 pages
Copyright © 2020 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Daisuke Ito, Yasushi Saito, Evaluation of Motion Blur in High-Speed Neutron Imaging at Kyoto University Research Reactor, Materials Research Proceedings, Vol. 15, pp 262-267, 2020
DOI: https://doi.org/10.21741/9781644900574-41
The article was published as article 41 of the book Neutron Radiography
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] T. Alghamdi, S.T. Thoroddsen, J. F.Hernández-Sánchez, Ultra-high speed visualization of a flash-boiling jet in a low-pressure environment, Int. J. Multiphase Flow 110 (2019) 238-255. https://doi.org/10.1016/j.ijmultiphaseflow.2018.08.004
[2] K. Mishima, et al., Visualization study of molten metal–water interaction by using neutron radiography, Nucl. Eng. Design 189 (1999) 391-403. https://doi.org/10.1016/S0029-5493(98)00263-5
[3] Y. Saito, et al., Velocity field measurement in gas–liquid metal two-phase flow with use of PIV and neutron radiography techniques, Applied Radiation and Isotopes 61 (2004) 683-691. https://doi.org/10.1016/j.apradiso.2004.03.110
[4] M. Kureta, et al., Study on point of net vapor generation by neutron radiography in subcooled boiling flow along narrow rectangular channels with short heated length, Int. J. Heat Mass Trans. 46 (2003) 1171-1181. https://doi.org/10.1016/S0017-9310(02)00398-8
[5] D. Ito and Y. Saito, Visualization of bubble behavior in a packed bed of spheres using neutron radiography, Physics Procedia 69 (2015) 593-598. https://doi.org/10.1016/j.phpro.2015.07.084
[6] R. Zboray, P. Trtik, 800 fps neutron radiography of air-water two-phase flow, MethodsX 5, (2018) 96-102. https://doi.org/10.1016/j.mex.2018.01.008
[7] A. Hillenbach, M. Engelhardt, H. Abele, R. Gähler, High flux neutron imaging for high-speed radiography, dynamic tomography and strongly absorbing materials, Nuclear Instruments and Methods in Physics Research A 542 (2005) 116-122. https://doi.org/10.1016/j.nima.2005.01.290
[8] B. Schillinger, E. Calzada, K. Lorenz, M. Muhlbauer, Continuous neutron radioscopy with 1000fps and 10 microsecond time resolution, NEUTRON RADIOGRAPHY, DEStech Publications (2008) 234-239.
[9] A.A. Harms and D.R. Wyman, Mathematics and physics of neutron radiography, Springer Netherlands (1986). https://doi.org/10.1007/978-94-015-6937-8
[10] D. Ito, Y. Saito, Y. Kawabata, Hybrid two-phase flow measurements in a narrow channel using neutron radiography and liquid film sensor, Physics Procedia 69 (2015) 570-576. https://doi.org/10.1016/j.phpro.2015.07.081
