Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Kureta, Masatoshi; Kumada, Hiroaki; Kume, Etsuo; Someya, Satoshi*; Okamoto, Koji*
Proceedings of 3rd International Workshop on Process Tomography (IWPT-3) (CD-ROM), 8 Pages, 2009/04
Dynamic neutron tomography velocimetry has been developed in order to obtain the 3-D velocity distribution and flow profile data of liquid metal flow in a heated rod bundle for development of an advanced nuclear reactor. In this paper, data processing methods for the 3-D velocimetry is focused on. The data processing is started from the reading images recorded by the three high-speed video cameras, and is finished to the visualization of velocity of the tracers and the profiles. Basic experiments were carried out using the research reactor JRR-4 and the dynamic neutron tomography system. As the results, it was confirmed that the 3-D velocity distribution and flow profile could be visualized by the new data processing methods.
-ray analysis and three-dimensional CT system for simultaneous multi-element determinationSegawa, Mariko; Kureta, Masatoshi; Matsue, Hideaki
no journal, ,
Developments for techniques to obtain information about multi-elemental distributions in objects non-destructively by each element separately is a good subject of wide interest, since this information obtained non-destructively are much of importance for the heterogeneous structural objects on several fields, such as materials science, life science and astrophysics and their related science. Hence, we newly developed a simultaneous multielement determination system for materials three-dimensionally using neutron induced prompt -ray detected by anti-Compton Ge-detector at Japan Research Reactor 3 in JAEA. This system is one of the promising ways which enabled the non-destructive and simultaneous multi-elements observation for internal structure on samples, since neutron beam strongly penetrates material and picks up information on several elements and isotopes. Here, this 3D imaging algorithms, which was employed in this system, included computed tomography method. Using this method, it is obtained that the distribution of several elements inside samples by measuring -ray from neutron captured reaction in three different directions for the neutron beam direction including the depth direction. We confirmed the principle of this technique experimentally and succeed in the 3-D visualization of the detailed structure based on multi-elemental analysis for the first time.