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Naoe, Takashi; Teshigawara, Makoto; Futakawa, Masatoshi; Mizutani, Haruki; Muramatsu, Toshiharu; Yamada, Tomonori; Ushitsuka, Yuji*; Tanaka, Nobuatsu*; Yamasaki, Kazuhiko*
Proceedings of 8th International Congress on Laser Advanced Materials Processing (LAMP 2019) (Internet), 5 Pages, 2019/05
Laser cutting is one of the options in the disposal of radio-active waste, such as spallation neutron target vessel in J-PARC, etc. Due to unique characteristic of laser, such as non-contact system, it is more easily to provide remote-controlled system in comparison with conventional one, such as mechanical cutting machine, etc. However, a demerit of laser cutting is the sputter and fume caused by laser cutting, resulting in contamination with radio-active materials its surroundings. Recently it was developed that the spatter suppression technique by controlling laser beam profile in laser welding process. In order to apply this suppression technique to laser cutting, first of all, we attempted to observe the phenomenon at melting area during laser cutting using a high-speed video camera in order to make the physical model. The result showed that the appearance of fume and sputter were independently confirmed in the time evolution.
Sato, Kaoru; Takahashi, Fumiaki; Endo, Akira; Ono, Koji*; Hasegawa, Takayuki*; Katsunuma, Yasushi*; Yoshitake, Takayasu*; Ban, Nobuhiko*; Kai, Michiaki*
RIST News, (58), p.25 - 32, 2015/01
The Japan Atomic Energy Agency (JAEA) are now developing WAZA-ARI for improvement of management of exposure doses due to CT examination under the joint research with the Oita University of Nursing and Health Sciences. The trial version of WAZA-ARI has been released on 21 December 2012. In trial version, users can perform dose assessment by using organ dose database based on the average adult Japanese male (JM-103) and female (JF-103) voxel phantoms and a 4 years old female voxel phantom (UFF4). The homepage of WAZA-ARI has been accessed over 1000 times per month and 28421 times by the end of September 2014. We are developing WAZA-ARI version 2 as the extension version of dose calculation functions of WAZA-ARI. WAZA-ARI version 2 will be released by the end of March 2015. In WAZA-ARI version 2. Users can upload dose calculation results to WAZA-ARI version 2 server, and utilize improvement of the dose management of patients and the optimization of CT scan conditions.
Usami, Tsutomu; Moriyama, Kiyofumi; Nishikizawa, Tomotoshi; Nakamura, Hideo
JAERI-Tech 2005-028, 37 Pages, 2005/05
JAERI-Tech-2005-028.pdf:16.32MB
The steam explosion during a severe accident in a light water reactor, which may occur by the contact of molten core and coolant, has been known as a potential threat on the integrity of the containment vessel, and has been studied in the nuclear safety research field. Prediction of the intensity of steam explosions needs an understanding of the initial premixture. However, visual observation of the premixture in experiments is usually difficult due to the vapor generation. Thus, we investigated the possibility of a high-speed X-ray visualization with a 4500 f/s high speed video camera with an image-intensifier and three kinds of scintillator materials: CdWO
, ZnS(Ag) and CsI(Tl). A modeled premixture consisted of metal objects and bubbles in a water vessel was used. The test result showed that the CsI(Tl) scintillator gave the best image quality among the three and the high-speed visualization at 4500 f/s was possible, though in the still picture which carried out one of the recorded picture, the picture became indistinct.
Yasuda, Ryo; Nakata, Masahito; Matsubayashi, Masahito; Harada, Katsuya; Ando, Hitoshi*
JAERI-Tech 2000-082, 38 Pages, 2001/02
JAERI-Tech-2000-082.pdf:7.79MB
no abstracts in English
Yasuda, Ryo; Nishi, Masahiro; Nakata, Masahito; Matsubayashi, Masahito
JAERI-Tech 2000-030, p.20 - 0, 2000/03
no abstracts in English
Matsubayashi, Masahito
Hamon, 4(3), p.14 - 24, 1994/10
no abstracts in English
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Tamokuteki Koon Gasu Jikkenroyo Kokuen Kozobutsu Shiken Kensa Kijun No Chosa Hokokusho, p.55 - 65, 1986/00
no abstracts in English
; ; ; ; ; ; ; *; *
JAERI-M 8525, 64 Pages, 1979/11
no abstracts in English
; ; ; ; ; ; *; *
JAERI-M 7780, 41 Pages, 1978/07
no abstracts in English
Ir;
Hihakai Kensa, 19(11), p.571 - 578, 1970/00
no abstracts in English
Watanabe, Yuki; Hosomi, Kenji; Kaneko, Junichi*; Arai, Tomohiro*; Takada, Chie
no journal, ,
no abstracts in English
Kawaguchi, Koichi; Segawa, Tomoomi; Ishii, Katsunori
no journal, ,
To evaluate the applicability of the light shaping method to the MOX fuel fabrication process, photocurable resin and CeO
slurry were irradiated with 4.7 MeV He ions, and cured layer thickness was measured. The experimental results showed that the entire slurry cures in a short time. It is evaluated to be difficult to apply the light shaping method to the MOX fuel fabrication process.
Kanno, Ikuo
no journal, ,
no abstracts in English
