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Ueta, Shohei; Aihara, Jun; Mizuta, Naoki; Goto, Minoru; Fukaya, Yuji; Tachibana, Yukio; Okamoto, Koji*
Proceedings of 9th International Topical Meeting on High Temperature Reactor Technology (HTR 2018) (USB Flash Drive), 7 Pages, 2018/10
The security and safety fuel (3S-TRISO fuel) employs the coated fuel particle with a fuel kernel made of plutonium dioxide (PuO) and yttria stabilized zirconia (YSZ) as an inert matrix. Especially, a zirconium carbide (ZrC) coating is one of key technologies of the 3S-TRISO, which performs as an oxygen getter to reduce the fuel failure due to internal pressure during the irradiation. R&Ds on ZrC coating directly on the dummy CeO
-YSZ kernel have been carried in the Japanese fiscal year 2017. As results of ZrC coating tests by the bromide chemical vapor deposition process, stoichiometric ZrC coatings with 3 - 18 microns of thicknesses were obtained with 0.1 kg of particle loading weight.
Myagmarjav, O.; Tanaka, Nobuyuki; Nomura, Mikihiro*; Kubo, Shinji
International Journal of Hydrogen Energy, 42(49), p.29091 - 29100, 2017/12
Times Cited Count:23 Percentile:51.45(Chemistry, Physical)The catalytic decomposition of hydrogen iodide in a membrane reactor using silica membranes derived from hexyltrimethoxysilane (HTMOS) was investigated for the production of hydrogen in the thermochemical water splitting iodine-sulfur process. The silica membranes were prepared by counter-diffusion chemical vapor deposition using porous alumina support tubes in both the absence and presence of a -alumina layer. The silica membranes formed on
-alumina-coated
-alumina tubes displayed a higher H
permeance than that formed directly on an
-alumina tube. A silica membrane based on a 1.5
m-thick
-alumina layer fabricated under deposition conditions of 450
C, 1200 s, and a N
carrier gas velocity of 0.044 m s
exhibited a high H
permeance of 9.4
10
mol Pa
m
s
while maintaining an H
/N
selectivity of over 80.0. The performance of a membrane reactor based on an HTMOS-derived silica membrane was evaluated at 400
C by measuring the HI conversion and H
flow rates. The conversion was approximately 0.48 when the HI flow rate was 9.7 mL min
.
Teraoka, Yuden
Nano Tekunoroji Daijiten, p.340 - 351, 2003/12
The current status of microprocesses using synchrotron radiation in Japan was reviewed. The SR-excited process is followed by SR-excited surface modification, SR-excited crystal growth and SR-excited etching. The SR-excited surface modification is followed by SR-gas-excited surface modification and SR-direct-excited surface modification. The SR-excited crystal growth is followed by SR-excited atomic layer epitaxy and SR-excited chemical vapor deposition. THe SR-excited etching is followed by SR-direct-excited etching, SR-gas-excited etching and SR ablation.
Hwang, G.*; Kim, J.*; Choi, H.*; Onuki, Kaoru
Journal of Membrane Science, 215(1-2), p.293 - 302, 2003/04
Times Cited Count:16 Percentile:55.84(Engineering, Chemical)no abstracts in English
Ueta, Shohei; Tobita, Tsutomu*; Ino, Hiroichi*; Takahashi, Masashi*; Sawa, Kazuhiro
JAERI-Tech 2002-085, 41 Pages, 2002/11
no abstracts in English
Hwang, G.; Onuki, Kaoru; Shimizu, Saburo
AIChE Journal, 46(1), p.92 - 98, 2000/01
Times Cited Count:38 Percentile:77.12(Engineering, Chemical)no abstracts in English
Hwang, G.*; Onuki, Kaoru; Shimizu, Saburo;
J. Membr. Sci., 162(1-2), p.83 - 90, 1999/00
Times Cited Count:67 Percentile:90.01(Engineering, Chemical)no abstracts in English
Hwang, G.*; Onuki, Kaoru; Shimizu, Saburo
JAERI-Research 98-002, 8 Pages, 1998/01
no abstracts in English
Onuki, Kaoru; ; Nakajima, Hayato; Shimizu, Saburo
J. Chem. Eng. Jpn., 30(2), p.359 - 362, 1997/00
Times Cited Count:3 Percentile:35.06(Engineering, Chemical)no abstracts in English
Nakano, Junichi; Yamada, Reiji
JAERI-Research 95-045, 26 Pages, 1995/06
no abstracts in English
Minato, Kazuo; ; Fukuda, Kosaku; ; ; ;
Nuclear Technology, 106, p.342 - 349, 1994/06
Times Cited Count:15 Percentile:76.74(Nuclear Science & Technology)no abstracts in English
Ogawa, Toru; Fukuda, Kosaku
Surface Modification Technologies,III, p.309 - 320, 1990/00
no abstracts in English
Minato, Kazuo;
Journal of Nuclear Materials, 149, p.233 - 246, 1987/00
Times Cited Count:58 Percentile:96.99(Materials Science, Multidisciplinary)no abstracts in English
Minato, Kazuo; ; Ikawa, Katsuichi
JAERI-M 85-043, 27 Pages, 1985/03
no abstracts in English
Koshikawa, Hiroshi; Yamamoto, Shunya; Sugimoto, Masaki; Kitamura, Akane; Sawada, Shinichi; Yamaki, Tetsuya
no journal, ,
Chemical etching of polymer films irradiated with heavy ions leads to the formation of ion-track membranes with nanoscale pores in different shapes. Particularly, conically-shaped pores are expected to have a potential to create metallic nanoneedles by combination of vapor-deposition and electroplating methods. In this study, we prepared copper nanoneedles inside the conical pores of polyimide (PI)-based ion-track membranes and investigated their morphology. The PI films were irradiated with Ar ions. The irradiated films were etched in a sodium hypochlorite solution at 60
C for 0.5 h, leading to the formation of conical pores with a surface diameter of ca. 500 nm. A very thin Au layer was deposited on this pore side of the ion-track membranes; then, it was used as a cathode for electroplating copper into the pores. After dissolving the PI templates, we obtained the copper needles ca. 500 nm in base diameter and 1.2
m in height on copper plates.
Myagmarjav, O.; Ikeda, Ayumi*; Nomura, Mikihiro*; Kubo, Shinji
no journal, ,
In this study, we have developed a highly hydrogen permeable silica membrane derived from hexyltrimethoxysilane as a Si precursor using porous alumina support. Modification of alumina support tubes in the absence of and in the presence of -alumina coating was carried out by a counter diffusion chemical vapor deposition (CVD). A membrane with intermediate
-alumina layer showed higher H
permeance (7.7
10
mol m
s
Pa
) than that formed directly on the
-alumina tube (3.8
10
mol m
s
Pa
). It was found that the thickness of
-alumina layer played an important role in the improvement of membrane permeation performance. Modified membrane based on
-alumina coating with a thickness of 1.5
m exhibited H
/SF
selectivity over 3000 at 270
C, while maintaining H
permeance in the order of 10
mol m
s
Pa
. The results led to the conclusion that the modified membrane is a promising candidate for further enhancement of HI decomposition in membrane reactor.