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Journal Articles

Experimental validation of tensile properties measured with thick samples taken from MEGAPIE target

Saito, Shigeru; Suzuki, Kazuhiro; Hatakeyama, Yuichi; Suzuki, Miho; Dai, Y.*

Journal of Nuclear Materials, 534, p.152146_1 - 152146_16, 2020/06

 Times Cited Count:1 Percentile:11.8(Materials Science, Multidisciplinary)

A post-irradiation examination (PIE) was performed on the tensile specimens prepared from the MEGAPIE (MEGAwatt Pilot Experiment) target which were irradiated in flowing lead-bismuth eutectic (LBE). Thicknesses of the specimens were over two times larger than that of the standard specimen. The PIE revealed that the T91 specimens showed a 1.5-2.0 times larger total elongation (TE) compared to the literature values for a specimen with standard t/w (ratio of thickness to width). It could be suggested that the t/w and TE were strongly correlated. Then, we tried to investigate the effects of the t/w on the TE by comparing unirradiated specimens. We found that there was no t/w dependence on the strength and uniform elongation. On the other hand, the TE increases with increasing t/w. Based on the experimental data, we correlated the TE with various specimens t/w to estimate appropriate TE values, including that for the standard specimen.

Journal Articles

Discrete fracture network model for faults distributed in Neogene massive siliceous mudstones

Hayano, Akira; Ishii, Eiichi

Shigen, Sozai Koenshu (Internet), 5(1), 9 Pages, 2018/03

no abstracts in English

Journal Articles

Comparative study of granitic and sedimentary groundwater colloids by flow-field flow fractionation coupled with ICP-MS

Saito, Takumi; Hamamoto, Takafumi*; Mizuno, Takashi; Iwatsuki, Teruki; Tanaka, Satoru*

Journal of Analytical Atomic Spectrometry, 30(6), p.1229 - 1236, 2015/06

 Times Cited Count:13 Percentile:60.61(Chemistry, Analytical)

Size distribution and elemental compositions of colloids in granitic and sedimentary deep groundwater was determined by flow field flow fractionation (Fl-FFF) combined with ICP-MS. In the granitic groundwater organic colloids and various inorganic elements were found in limited size ranges ($$<$$10 nm and $$>$$140 nm). The presence of different types of organic colloids was suggested in this groundwater. Most of the inorganic elements exhibited similar size distributions at $$<$$10 nm, which were largely overlapped with organic colloids rich in fluorophores. In the sedimentary groundwater small organic and probably inorganic colloids were found at $$<$$5 nm together with relatively large inorganic colloids. Organic colloids in this groundwater were homogeneous in terms of their sizes and the compositions of chromohores and fluorophores. The size distribution of inorganic elements depended on their types, indicating the presence of different host colloidal phases for them.

Journal Articles

X-ray line profile study on shot/laser-peened stainless steel

Kumagai, Masayoshi*; Akita, Koichi; Imafuku, Muneyuki*; Oya, Shinichi*

Advanced Materials Research, 996, p.39 - 44, 2014/08

 Times Cited Count:6 Percentile:93.33(Engineering, Mechanical)

The microstructural features of shot and laser peened austenitic stainless steels were studied using line profile analysis with X-rays. Although both specimens had similar residual stress profiles toward the depth direction, the microstructural features were different not only on the original surfaces of the specimens but also to several micrometers in depth. The dislocation densities of the SP specimen were greater than that of the LP specimen. And the crystallite sizes of the SP specimen were smaller than that of the LP specimen.

Journal Articles

Study on proton-induced single event upset in Sub-0.1$$mu$$m CMOS LSIs

Fukui, Hironobu*; Hamaguchi, Masafumi*; Yoshimura, Hisao*; Oyamatsu, Hisato*; Matsuoka, Fumitomo*; Noguchi, Tatsuo*; Hirao, Toshio; Abe, Hiroshi; Onoda, Shinobu; Yamakawa, Takeshi; et al.

Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.169 - 172, 2004/10

no abstracts in English

Journal Articles

Mechanical property of F82H steel doped with boron and nitrogen

Wakai, Eiichi; Matsukawa, Shingo; Yamamoto, Toshio*; Kato, Yoshiaki; Takada, Fumiki; Sugimoto, Masayoshi; Jitsukawa, Shiro

Materials Transactions, 45(8), p.2641 - 2643, 2004/08

 Times Cited Count:6 Percentile:41.09(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Gas-permeation control by PET membranes with nanosized pores

Takahashi, Shuichi*; Yoshida, Masaru; Asano, Masaharu; Nakagawa,Tsutomu*

Polymer Journal, 36(1), p.50 - 53, 2004/01

 Times Cited Count:4 Percentile:12.7(Polymer Science)

The poly(ethylen terephthalate)(PET) membrane, which has a membrane thickness of 12$$mu$$m, was used in this study. PET is a polymer widely used for fibers, films and bottles. It was assumed that for PET, which is often used as a gas barrier film, it is easy to effect changes in its gas permeability by modification, such as by ion irradiation. Previously, I reported the effect of heavy ion irradiation on the gas permeation of a PET membrane. A portion of the heavy ion irradiated PET membranes exhibited the Knudsen flow during the gas permeation measurements. As a next step, therefore, I applied an etching technique utilizing NaOH solution to control the nanosized pore of the heavy ion irradiated PET membrane. PET membranes irradiated at a fluence of 3$$times$$10$$^{9}$$ ions/cm$$^{2}$$ were etched in 6N or 1N NaOH solution at 60$$^{circ}$$C. The etching time was controlled to observe the changes in the gas permeation behavior depended on the etchig. This objective has consequently been used to control the Knudsen flow.

Journal Articles

Nanoparticle formation by pulsed laser ablation of TiO$$_{2}$$

Yamaki, Tetsuya; Ito, Hisayoshi; Matsubara, Masakazu*; Abe, Hiroaki*; Asai, Keisuke*

Transactions of the Materials Research Society of Japan, 28(3), p.879 - 882, 2003/10

Titanium oxide nanoparticles were formed by pulsed laser ablation of a TiO$$_{2}$$ rutile pellet with a KrF excimer laser ($$lambda$$ = 248 nm). The ablation was performed in atmospheres of Ar and O$$_{2}$$ at total pressures ranging from 0.2 and 10 Torr. At a higher pressure than 1 Torr, Ti in the nanoparticles had an oxidation state of 4+ to form TiO$$_{2}$$. According to the X-ray diffraction analyses, the nanopartiles were found to contain both the anatase and rutile phases, which crystallized through extremely energetic, non-equilibrium reactions in an ablation plume. In contrast, at pressures of 0.2 and 0.5 Torr, the nanoparticles were composed of dominant TiO$$_{2}$$ with a small amount of a less oxidized phase such as Ti$$_{2}$$O$$_{3}$$. The important result is that the XRD patterns of the samples prepared at 1 and 5 Torr showed the different anatase-to-rutile ratio of the peak intensities. This indicates that the weight fraction of the rutile/anatase crystalline phases can be controlled by the ambient gas pressure.

Journal Articles

Large-scale numerical simulations of two-phase flow behavior in a fuel bundle of a reduced-moderation light water reactor

Takase, Kazuyuki; Yoshida, Hiroyuki; Ose, Yasuo*; Tamai, Hidesada; Kano, Takuma; Akimoto, Hajime

Nihon Konsoryu Gakkai Nenkai Koenkai 2003 Koen Rombunshu, p.33 - 34, 2003/00

no abstracts in English

Journal Articles

Effects of breach size and dust density on activated dust mobilization in ITER during a loss-of-vacuum event

Takase, Kazuyuki

Fusion Engineering and Design, 63-64, p.205 - 210, 2002/12

 Times Cited Count:2 Percentile:16.96(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Effect of solute atoms on swelling in Ni alloys and pure Ni under He$$^{+}$$ ion irradiation

Wakai, Eiichi; Ezawa, Tadashi*; Imamura, Junko*; Takenaka, Tsuyoshi*; Tanabe, Tetsuo*; Oshima, Ryuichiro*

Journal of Nuclear Materials, 307-311(Part.1), p.367 - 373, 2002/12

 Times Cited Count:29 Percentile:84.85(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Dielectric investigation of [(SrTiO$$_{3}$$)$$_{6}$$(BaTiO$$_{3}$$)$$_{6}$$]$$_{2}$$ multilayer capacitor

Yoneda, Yasuhiro; Sakaue, Kiyoshi*; Terauchi, Hikaru*

Japanese Journal of Applied Physics, Part 1, 40(12), p.6888 - 6892, 2001/12

 Times Cited Count:2 Percentile:11.78(Physics, Applied)

no abstracts in English

Journal Articles

Phase transition of BaTiO$$_{3}$$ thin films

Yoneda, Yasuhiro; Sakaue, Kiyoshi*; Terauchi, Hikaru*

Journal of Physics; Condensed Matter, 13(42), p.9575 - 9582, 2001/10

 Times Cited Count:19 Percentile:68.05(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Formation of hybrid monolayers and langmuir-blodgett-type multilayers from ammonium cations and TiO$$_{2}$$ crystalline nanosheets

Yamaki, Tetsuya; Shinohara, Ryuji*; Asai, Keisuke*

Thin Solid Films, 393(1-2), p.154 - 160, 2001/08

 Times Cited Count:10 Percentile:50.69(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Experimental radioimmunotherapy with $$^{186}$$Re-MAG3-A7 anti-colorectal cancer monoclonal antibody; Comparison with $$^{131}$$I-counterpart

Kinuya, Seigo*; Yokoyama, Kunihiko*; Kobayashi, Katsutoshi; Motoishi, Shoji; Onoma, Katsuyuki; Watanabe, Naoto*; Shuke, Noriyuki*; Bunko, Hisashi*; Nichigishi, Takatoshi*; Tonami, Norihisa*

Annals of Nuclear Medicine, 15(3), p.199 - 202, 2001/06

 Times Cited Count:9 Percentile:31.12(Radiology, Nuclear Medicine & Medical Imaging)

no abstracts in English

Journal Articles

Evidence of quantum size effect in nanocrystalline silicon by optical absorption

Matsumoto, Takahiro*; Suzuki, Junichi; Onuma, Masato*; Kanemitsu, Yoshihiko*; Masumoto, Yasuaki*

Physical Review B, 63(19), p.195322_1 - 195322_5, 2001/05

 Times Cited Count:57 Percentile:89.86(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Optimization of decoupled hydrogen moderator

Harada, Masahide; Teshigawara, Makoto; Kai, Tetsuya; Sakata, Hideaki*; Watanabe, Noboru; Ikeda, Yujiro

JAERI-Conf 2001-002, p.793 - 807, 2001/03

no abstracts in English

Journal Articles

Reactivity between humic substances isolated from groundwater and metals by three-dimensional fluorescence spectrometry

Imanaka, Masayo*; Nagao, Seiya; Nakaguchi, Yuzuru*; Yamaguchi, Yoshitaka*; Suzuki, Yasuhiro*; Murakami, Masahiro*; Hiraki, Keizo*

Proceedings of International Conference on the Biogeochemistry of Trace Elements (ICOBTE2001), P. 662, 2001/00

no abstracts in English

Journal Articles

RF properties of 9.46GHz FEL using an oversized waveguide

Maebara, Sunao; Morimoto, Iwao*; Shiho, Makoto

Shingaku Giho, 100(405), p.61 - 64, 2000/11

no abstracts in English

JAEA Reports

Mercury flow tests, 2; Characteristic of gear pump for mercury circulation

Kaminaga, Masanori; Kinoshita, Hidetaka; Haga, Katsuhiro; Hino, Ryutaro; Nakamura, Fumihito*; Ohashi, Masahisa*

JAERI-Tech 2000-044, 25 Pages, 2000/06

JAERI-Tech-2000-044.pdf:4.64MB

no abstracts in English

57 (Records 1-20 displayed on this page)