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Kurita, Keisuke; Sakai, Takuro; Suzui, Nobuo*; Yin, Y.-G.*; Sugita, Ryohei*; Kobayashi, Natsuko*; Tanoi, Keitaro*; Kawachi, Naoki*
Japanese Journal of Applied Physics, 60(11), p.116501_1 - 116501_4, 2021/11
Times Cited Count：1 Percentile：7.86(Physics, Applied)Radioisotope tracer imaging is useful for studying plant physiological phenomena. In this study, we developed an autoradiography system with phosphor powder (ZnS:Ag), "Live-autoradiography", for imaging radioisotope dynamics in a living plant. This system visualizes the element migration and accumulation in intact plants continuously under a light environment. An imaging test was performed on point sources of 
Cs, with a radioactivity of 10-100 kBq of being observed; this indicates satisfactory system linearity between the image intensity and the radioactivity of Cs. Moreover, dynamics imaging of Cs was performed on an intact soybean plant for four days. The serial images indicated Cs accumulation in the node, vein, and growing point of the plant. The developed system can be used for studying plant physiological phenomena and can be employed for quantitative measurement of radionuclides.
Kai, Tetsuya; Shinohara, Takenao; Hiroi, Kosuke; Su, Y. H.; Oikawa, Kenichi
Hihakai Kensa, 67(5), p.209 - 216, 2018/05
no abstracts in English
Kureta, Masatoshi
Kagaku Kogaku, 80(8), p.464 - 467, 2016/08
A neutron radiography is technology which carries out visualization and measurement of the inside of a substance using neutrons. This technology has the complementary feature comparing with X-ray radiography (Roentgen technique). In this review paper, the measurement principle, some application examples such as visualization of oil in the working car engine, and about the leading-edge technology using high-intensity proton beam accelerator facility J-PARC (common neutron imaging facility), etc. It was introduced in the form where the whole neutron radiography technology for every dimension of measurement were covered.
Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito
Hamon, 25(4), p.277 - 282, 2015/11
We introduce the basic principle of neutron radiography technique, and the brief review of its applications. Most of works in this article have been performed at TNRF, Tokai, Japan. Neutron radiography is a nondestructive testing method, so that this technique is used for not only academic studies but also industrial applications. Keywords: neutron radiography, imaging, TNRF
Okuno, Koichi*; Iikura, Hiroshi
Nuclear Science and Techniques, 25(S1), p.S010604_1 - S010604_5, 2014/12
no abstracts in English
Kureta, Masatoshi
Hamon, 24(特別号), 2 Pages, 2014/11
The fundamentals and applications on the neutron imaging technique, volume visualization and 3D measurement by the neutron 3D-CT technique and the most advanced imaging technique by using pulsed neutrons were reviewed in this paper. Visualization and measurement of the inside mortaring car engine is one of the industrial applications on the neutron imaging technique. This technique was also applied for visualization and measurement of the multiphase plow applications. The 3D visualization technique has been used for the concrete research etc. The pulsed neutron imaging techniques developed for J-PARC have made possible element-selective imaging and metallographic structure imaging which were impossible by the traditional techniques. Newly providing pulsed neutron imaging facilities for common use is also introduced briefly.
Matsubayashi, Masahito; Kawabata, Yuji*
Hoshasen To Sangyo, (107), p.4 - 15, 2005/09
no abstracts in English
Katayama, Yoshinori
Nihon Butsuri Gakkai-Shi, 60(6), p.456 - 460, 2005/06
By means of in-situ high-temperature and high-pressure experiment, we found two distinct structures of molten phosphorus, one is a molecular fluid and the other is a polymeric liquid, and an abrupt and reversible structural transformation between them at about 1 GPa. Further investigations revealed that the two structures have different densities and they separate macroscopically during the transformation. These results support a view that this change is an extremely rare example of a first-order phase transition between two stable disordered phases besides liquid-gas transition.
Department of Hot Laboratories
JAERI-Review 2005-003, 105 Pages, 2005/02
JAERI-Review-2005-003.pdf:21.21MB
no abstracts in English
Matsubayashi, Masahito; Yasuda, Ryo; Tanji, Akira; Miyata, Satoru; Matsue, Hideaki; Nakanishi, Tomoko
Dai-5-Kai Hoshasen Ni Yoru Hihakai Hyoka Shimpojiumu Koen Rombunshu, p.35 - 36, 2005/02
no abstracts in English
Yasuda, Ryo; Matsubayashi, Masahito; Nakata, Masahito; Harada, Katsuya; Amano, Hidetoshi; Sasajima, Fumio; Nishi, Masahiro; Horiguchi, Yoji
IEEE Transactions on Nuclear Science, 52(1), p.313 - 316, 2005/02
Times Cited Count：14 Percentile：67.84(Engineering, Electrical & Electronic)Neutron radiography is useful to inspect macroscopic change in nuclear fuels before and after irradiation. We have been investigated the practicality of neutron imaging plate and neutron CT methods for the inspection of the spent fuels. A fresh UO2 fuel rod was examined by those methods. The test results of those samples are available to develop the system of those methods for the spent fuels and to determine the specifications of the system. Some good images of those samples are obtained by those examinations. The shape of the pellets in the fuel rod is clearly recognized in the image. Those images are analyzed to estimate the size of some parts in the fuel pellets.
X-ray observations with synchrotron radiationKaneko, Hiroshi*; Funakoshi, Kenichi*; Katsura, Tomoo*; Utsumi, Wataru
Koatsuryoku No Kagaku To Gijutsu, 15(1), p.9 - 14, 2005/01
This article addresses the computer control and data analysis system in "SPEED-1500", a Kawai-type multi-anvil press installed on beamline BL04B1 at the SPring-8, which is for X-ray diffraction and radiography experiments by means of synchrotron radiation. The system consists of several different computer applications, which are for pressure and temperature control, stage and goniometer control, and data-collection and its analysis. These programs have been used by many public users and are still improving.
Kureta, Masatoshi
Kashika Joho Gakkai-Shi, 24(Suppl.1), p.265 - 268, 2004/07
Visualization of 3D and instantaneous void fraction distribution of boiling flow in a tight-lattice 14-rod bundle is conducted by using neutron tomography and high-frame- rate neutron radiography void fraction measurement techniques. The purpose of the experiment is to understand vapor bubbles/water behavior ranging from the onset of boiling to the high void fraction region based on ("3D" + "2D+Time") void fraction data, and to obtain the fine-mesh database for verification of advanced analysis codes. Following phenomena are made clear from the present experiment: Vapor accumulates in the channel center; High void fraction spots appear between adjacent heater rods, that is, in narrow space at the inlet; Void fraction in the triangular space among three rods becomes high by void drift phenomenon, and "vapor chimney" is formed; Flow is intermittent, and vapor bubble clusters are formed periodically; Onset points of net vapor generation are scattered not only in the center but in the peripheral.
Kureta, Masatoshi; Tamai, Hidesada
Proceedings of 5th International Conference on Multiphase Flow (ICMF 2004) (CD-ROM), 10 Pages, 2004/06
3D void fraction distribution of boiling flow in a tight-lattice 7-rod bundle was measured by neutron radiography 3D computed tomography (neutron tomography) to investigate the flow characteristics in tight-lattice rod bundles and to verify the numerical analysis codes. The test section simulates the fuel rod bundle of the RMWR and consists of 7 heater rods with gap of 1.0mm and with diameter of 12.0mm. In this paper, the neutron tomography system, experiments and comparison of the measured data with a subchannel analysis code, COBRA-TF, are reported. It was found from this experiment that water layer which surrounds the heater rod becomes thick between rods, narrow region, and steam accumulates at the center region among three rods. COBRA-TF code overestimates the void fraction in a tight-lattice bundle compared with the present data.
Kureta, Masatoshi; Hoshi, Yoshiyuki; Yamada, Kazuyuki*; Sakamoto, Kiyotaka*
Nikkei Saiensu, 111 Pages, 2004/01
no abstracts in English
Kureta, Masatoshi
Funryu Kogaku, 20(2), p.24 - 31, 2003/07
no abstracts in English
Kureta, Masatoshi
Genshiryoku eye, 49(4), p.34 - 37, 2003/04
no abstracts in English
Kureta, Masatoshi
Kashika Joho Gakkai-Shi, 23(89), p.21 - 26, 2003/04
no abstracts in English
Kureta, Masatoshi; Hibiki, Takashi*; Mishima, Kaichiro*; Akimoto, Hajime
International Journal of Heat and Mass Transfer, 46(7), p.1171 - 1181, 2003/03
Times Cited Count：13 Percentile：49.26(Thermodynamics)no abstracts in English
Ishiyama, Shintaro; Matsubayashi, Masahito; Akiba, Masato
Nihon Genshiryoku Gakkai Wabun Rombunshi, 1(4), p.439 - 448, 2002/12
no abstracts in English
