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Segawa, Tomoomi; Kawaguchi, Koichi; Ishii, Katsunori; Suzuki, Masahiro; Tachihara, Joji; Takato, Kiyoto; Okita, Takatoshi; Satone, Hiroshi*; Suzuki, Michitaka*
Mechanical Engineering Journal (Internet), 8(3), p.21-00022_1 - 21-00022_9, 2021/06
To reduce the hold-up of the nuclear fuel materials in the glove box and the external exposure dose, the technology of the MOX powder adhesion prevention by the nanoparticle coating to the acrylic panels of the glove box has been developed. The surface analysis by means of atomic force microscopy (AFM) showed that the acrylic test piece surface coated with nanoparticles had a higher root mean square roughness value than that non-coated with nanoparticles. Due to the formation of nano-sized tiny rugged surface, the nanoparticle coating reduced the minimum adhesion force between the UO
particles and the acrylic test piece surface with the smallest particle size of about 5 
m where desorption was observed, by about one-tenth. Moreover, the nanoparticle coating reduced the amount of the MOX powder adhering to the acrylic test piece to about one-tenth. In this study, it was found that applying the nanoparticle coating to the acrylic panels of glove box can prevent the adhesion of nuclear fuel materials. This method is effective for reducing the hold-up of the nuclear fuel materials in the glove box, the external exposure dose and improving the visibility of the acrylic panels.
Muramatsu, Toshiharu
Reza Kako Gakkai-Shi, 25(2), p.81 - 85, 2018/06
no abstracts in English
Muramatsu, Toshiharu
Dai-84-KaiReza Kako Gakkai Koen Rombunshu, p.113 - 116, 2016/01
A general-purpose three-dimensional thermohydraulics numerical simulation code SPLICE was developed at Japan Atomic Energy Agency and designed to deal with gas-liquid-solid consolidated incompressible viscous flows with a phase change process in various laser applications, such as welding, coating, cutting, etc. The result obtained from laser coating simulations is very encouraging in the sense that the SPLICE code would be used as one of efficient front-loading tools for related to the laser coating processes.
Yamamoto, Masahiro*; Okano, Fuminori; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Suzuki, Sadaaki; Shibata, Takatoshi
JAERI-Tech 2005-061, 11 Pages, 2005/09
JAERI-Tech-2005-061.pdf:0.94MB
Ferritic steel plates were installed in the JFT-2M vacuum vessel to conduct "the Advanced Material Tokamak Experiments (AMTEX)". A coating device with tri-methyl-bron(TMB)was developed to coat the ferritic steel surface with boron, since the ferritic steel is easy to rust and also has a property to absorb much impurity in the surface. The TMB gas used in the device was diluted with helium gas to 1% for ensuring workers themselves against the toxicity of the TMB. The uniformity and stability of the coated layer have been confirmed through sample tests with a microscope, whose samples had been set in the tokamak vacuum vessel. The coating thickness measured with X-ray photoelectron emission spectroscopy was roughly 130nm. In the plasma experiments after the boron coating, radiation loss in the plasma decreased to 1/3, and oxygen impurity also decreased to 1/10 compared to without the boron coating.
Carty, G. J.*; Machida, Masahiko; Hampshire, D. P.*
Physical Review B, 71(14), p.144507_1 - 144507_9, 2005/04
Times Cited Count：13 Percentile：49.91(Materials Science, Multidisciplinary)no abstracts in English
Igawa, Naoki; Taguchi, Tomitsugu; Yamada, Reiji; Ishii, Yoshinobu; Jitsukawa, Shiro
Ceramic Engineering and Science Proceedings, Vol.26, No.2, p.27 - 34, 2005/00
no abstracts in English
Ishiyama, Shintaro
Nihon Kinzoku Gakkai-Shi, 68(6), p.353 - 361, 2004/06
Times Cited Count：0 Percentile：0.01(Metallurgy & Metallurgical Engineering)AlO
and ZrO coating test was performed on the surface of Ni based super alloy by ion plateing technique and high density and homegeneity ceramic thin coating with the thichkness of 4m was formed on the specimen surface. 1173K-RT heat cycle and FP plat-out tests were performed with these coate specimens and no damage was found under 100 cycles and there is no plate-out onto the these specimens.
Kinsho, Michikazu; Saito, Yoshio*; Kabeya, Zenzaburo*; Tajiri, Keisuke*; Nakamura, Tomaru*; Abe, Kazuhiko*; Nagayama, Taketoshi*; Nishizawa, Daiji*; Ogiwara, Norio
Vacuum, 73(2), p.187 - 193, 2004/03
Times Cited Count：17 Percentile：54.92(Materials Science, Multidisciplinary)Alimina ceramics vacuum duct has been developing at JAERI for the 3GeV-RCS of the J-PARC project. There are two type of the alumina ceramics vacuum ducts, one is a 1.5m-long duct with a circular cross section for use in the quadrupole magnet, the other is a 3.5m-long being bending 15 degree with an elliptical cross section for use in the dipole magnet.These ducts could be manufactured by brazed jointing several duct segments of 0.5-0.8 m long. Since some electrically conductive boundary is necessary to form on the ceramics duct in order to reduce the duct impedance, the alumina ceramics ducts have copper stripes on the outside surface of the ducts. This is called for rf shielding system. The copper stripes as rf shielding is produced by an electroforming method. In order to reduce emitting secondary electrons when primary protons or electrons impinge onto the surface, TiN film is coated inside surface of the alumina ceramics duct.
Nakamichi, Masaru; Kawamura, Hiroshi; Teratani, Takema*
Fusion Science and Technology, 41(3), p.939 - 942, 2002/05
no abstracts in English
Tsuzuki, Kazuhiro; Isei, Nobuaki; Kawashima, Hisato; Sato, Masayasu; Kimura, Haruyuki; Ogawa, Hiroaki; Miura, Yukitoshi; Ogawa, Toshihide; Shibata, Takatoshi; Akiyama, Takashi*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 78(5), p.455 - 461, 2002/05
no abstracts in English
O coating as electrical insulatorNakamichi, Masaru; Kawamura, Hiroshi
Fusion Engineering and Design, 58-59, p.719 - 723, 2001/11
Times Cited Count：11 Percentile：61.93(Nuclear Science & Technology)no abstracts in English
Nakamichi, Masaru; Kawamura, Hiroshi; Teratani, Takema*
Journal of Nuclear Science and Technology, 38(11), p.1007 - 1013, 2001/11
Times Cited Count：40 Percentile：92.09(Nuclear Science & Technology)no abstracts in English
Kimura, Haruyuki; Sato, Masayasu; Kawashima, Hisato; Isei, Nobuaki; Tsuzuki, Kazuhiro; Ogawa, Hiroaki; Ogawa, Toshihide; Miura, Yukitoshi; Yamamoto, Masahiro; Shibata, Takatoshi; et al.
Fusion Engineering and Design, 56-57, p.837 - 841, 2001/10
Times Cited Count：14 Percentile：68.91(Nuclear Science & Technology)no abstracts in English
Igawa, Naoki; Taguchi, Tomitsugu; Yamada, Reiji; Jitsukawa, Shiro
Ceramic Engineering and Science Proceedings (24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: B), 21(4), p.237 - 242, 2000/09
no abstracts in English
Lan, K. N.*; Lam, N. D.*; Kume, Tamikazu
JAERI-Conf 2000-003, p.101 - 106, 2000/03
no abstracts in English
Nishida, Kaoru*; Maemura, Tsuneyuki*
JNC TJ7400 2000-004, 102 Pages, 2000/02
JNC-TJ7400-2000-004.pdf:5.64MB
no abstracts in English
Tsuzuki, Kazuhiro; Sato, Masayasu; Kawashima, Hisato; Miura, Yukitoshi; Kimura, Haruyuki; Abe, Tetsuya; Uehara, Kazuya; Ogawa, Toshihide; Akiyama, Takashi*; Shibata, Takatoshi; et al.
Journal of Nuclear Materials, 283-287, p.681 - 684, 2000/00
Times Cited Count：12 Percentile：62.12(Materials Science, Multidisciplinary)no abstracts in English
Taguchi, Tomitsugu; Igawa, Naoki; Yamada, Reiji; Futakawa, Masatoshi; Jitsukawa, Shiro
Proceedings of 24th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures A, 21(3), p.453 - 458, 2000/00
no abstracts in English
Kawamura, Hiroshi; *
JAERI-Conf 98-001, 363 Pages, 1998/01
no abstracts in English
Arita, Makoto; Obata, Hiroyuki*; Hayashi, Takumi; Okuno, Kenji; Shu, W. M.*; Hayashi, Y.*
Fusion Technology, 28(3), p.1132 - 1137, 1995/10
no abstracts in English
