Three-Dimensional X-Ray CT Image of an Irradiated FBR Fuel Assembly

2010 ◽  
Vol 169 (1) ◽  
pp. 73-80 ◽  
Author(s):  
Kozo Katsuyama ◽  
Koji Maeda ◽  
Tsuyoshi Nagamine ◽  
Hirotaka Furuya
Keyword(s):  
Fuel Assembly ◽  
Three Dimensional ◽  
Ct Image ◽  
X Ray

Measurement of Three-Dimensional Time-Averaged Void Fraction Distribution in Rod Bundle in Air-Water System by X-Ray CT Technique

2013 ◽  
Author(s):  
Kenichi Katono ◽  
Jun Nukaga ◽  
Takuji Nagayoshi ◽  
Kenichi Yasuda
Keyword(s):  
Fuel Assembly ◽  
Void Fraction ◽  
Two Phase Flow ◽  
Three Dimensional ◽  
Ct Images ◽  
Phase Flow ◽  
Two Phase ◽  
X Ray ◽  
Void Fraction Distribution ◽  
Fraction Distribution

We have been developing a void fraction distribution measurement technique using the three-dimensional (3D) time-averaged X-ray CT (computed tomography) system to understand two-phase flow behavior inside a fuel assembly for BWR (boiling water reactor) thermal hydraulic conditions of 7.2 MPa and 288 °C. Unlike CT images of a normal standstill object, we can obtain 3D CT images that are reconstructed from time-averaged X-ray projection data of the intermittent two-phase flow. We measured the 3D void fraction distribution in a vertical square (5 × 5) rod array that simulated a BWR fuel assembly in the air-water test. From the 3D time-averaged CT images, we confirmed that the void fraction at the center part of the channel box was higher than that near the channel box wall, and the local void fraction at the central region of a subchannel was higher than that at the gap region of the subchannel. A comparison of the volume-averaged void fractions evaluated by the developed X-ray CT system with those evaluated by a differential pressure transducer in a void fraction range from 0.05 to 0.40 showed satisfactory agreement within a difference of 0.03.

scholarly journals Three-Dimensional Fabric Analysis for Anisotropic Material Using Multi-Directional Scanning Line —Application to X-ray CT Image—

2007 ◽  
Vol 48 (6) ◽  
pp. 1173-1178 ◽  
Author(s):  
Takato Takemura ◽  
Manabu Takahashi ◽  
Masanobu Oda ◽  
Hidekazu Hirai ◽  
Atsushi Murakoshi ◽  
...  
Keyword(s):  
Anisotropic Material ◽  
Three Dimensional ◽  
Ct Image ◽  
X Ray ◽  
Fabric Analysis ◽  
Scanning Line

Three-dimensional display of X-ray CT image

1986 ◽  
Vol 2 (2) ◽  
pp. 90-96
Author(s):  
Yasuzo Suto ◽  
Masao Kato ◽  
Takeshi Ozeki ◽  
Masami Ueda ◽  
Tsutomu Izumida ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Ct Image ◽  
X Ray ◽  
Three Dimensional Display

scholarly journals Evaluation of Medical Three Dimensional Image. : Comparion of MR Image and Helical X-ray CT Image.

1995 ◽  
Vol 51 (3) ◽  
pp. 324
Author(s):  
Kousuke Ueda ◽  
Shinji Watanabe ◽  
Kenji Oomoto ◽  
Toshiaki Kawakami
Keyword(s):  
Three Dimensional ◽  
Ct Image ◽  
Mr Image ◽  
X Ray ◽  
Dimensional Image

Three-Dimensional Display of X-Ray CT Image

1985 ◽  
pp. 349-361
Author(s):  
Yasuzo Suto ◽  
Masao Kato ◽  
Takeshi Ozeki ◽  
Masami Ueda ◽  
Tsutomu Izumida ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Ct Image ◽  
X Ray ◽  
Three Dimensional Display

Development of High Resolution X-Ray CT Technique for Highly-Radioactive Material

2012 ◽  
Vol 1475 ◽  
Author(s):  
Kozo Katsuyama ◽  
Akihiro Ishimi ◽  
Koji Maeda ◽  
Tsuyoshi Nagamine ◽  
Takeo Asaga
Keyword(s):  
Fuel Assembly ◽  
Cross Section ◽  
Gamma Ray ◽  
Radioactive Material ◽  
Ct Image ◽  
Radioactive Materials ◽  
X Ray ◽  
Ct System ◽  
Non Destructive ◽  
Irradiated Fuel

ABSTRACTIn order to observe the structural change in the interior of irradiated fuel assembly, the non-destructive post irradiation examination technique using X-ray computer tomography (X-ray CT) was developed.In this X-ray CT system, the 12 MeV X-ray pulses were used in synchronization with the switch-in of the detector in order to minimize the effects of the gamma ray emissions from the irradiated fuel assembly then clear cross section CT image of irradiated fuel assembly could be successfully obtained. Also, this non-destructive technique can be applied to observe the inner condition of the high radioactive materials such as a radioactive waste.

Ribosome Structural Organization

1974 ◽  
Vol 32 ◽  
pp. 332-333
Author(s):  
James A. Lake
Keyword(s):  
Ribosomal Proteins ◽  
Structural Organization ◽  
Three Dimensional ◽  
Small Subunit ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Specific Antibodies ◽  
X Ray ◽  
E Coli ◽  
Complete Sequences

The understanding of ribosome structure has advanced considerably in the last several years. Biochemists have characterized the constituent proteins and rRNA's of ribosomes. Complete sequences have been determined for some ribosomal proteins and specific antibodies have been prepared against all E. coli small subunit proteins. In addition, a number of naturally occuring systems of three dimensional ribosome crystals which are suitable for structural studies have been observed in eukaryotes. Although the crystals are, in general, too small for X-ray diffraction, their size is ideal for electron microscopy.

3-D reconstruction of molecular shape from microcrystal thin sections

1983 ◽  
Vol 41 ◽  
pp. 748-749
Author(s):  
S. Cusack ◽  
J.-C. Jésior
Keyword(s):  
Three Dimensional ◽  
Molecular Shape ◽  
Biological Molecules ◽  
Fourier Space ◽  
Single Particles ◽  
Thin Sections ◽  
Standard Methods ◽  
X Ray ◽  
X Ray Crystallography ◽  
Dimensional Reconstruction

Three-dimensional reconstruction techniques using electron microscopy have been principally developed for application to 2-D arrays (i.e. monolayers) of biological molecules and symmetrical single particles (e.g. helical viruses). However many biological molecules that crystallise form multilayered microcrystals which are unsuitable for study by either the standard methods of 3-D reconstruction or, because of their size, by X-ray crystallography. The grid sectioning technique enables a number of different projections of such microcrystals to be obtained in well defined directions (e.g. parallel to crystal axes) and poses the problem of how best these projections can be used to reconstruct the packing and shape of the molecules forming the microcrystal.Given sufficient projections there may be enough information to do a crystallographic reconstruction in Fourier space. We however have considered the situation where only a limited number of projections are available, as for example in the case of catalase platelets where three orthogonal and two diagonal projections have been obtained (Fig. 1).

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