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Journal Articles

Synchrotron radiation X-ray diffraction method

Hayashi, Makoto*; Shobu, Takahisa

Residual Stress, p.100 - 132, 2021/00

Structural materials may undergo fatigue fracture or stress corrosion cracking during use. One of the causes is the residual stress generated by heat treatment and processing in the manufacturing process of structural materials. There are various methods for measuring the residual stress. This book introduces measurement techniques using ultrasonic and magnetic methods, starting with laboratory X-rays, synchrotron radiation X-rays, and neutrons. In addition, we will outline examples of measurement of residual stress due to processing and welding of various materials, measurement examples of actual machines, change behavior of residual stress due to static and repeated loads, and evaluation methods of fatigue remaining life based on the change behavior.

JAEA Reports

Developing the soil moisture sensor using optical fiber technique (Joint research)

Komatsu, Mitsuru*; Nishigaki, Makoto*; Seno, Shoji*; Hirata, Yoichi*; Takenobu, Kazuyoshi*; Tagishi, Hirotaka*; Kunimaru, Takanori; Maekawa, Keisuke; Yamamoto, Yoichi; Toida, Masaru*; et al.

JAEA-Research 2012-001, 77 Pages, 2012/09

JAEA-Research-2012-001.pdf:4.85MB

This research focused on methods of estimating the amounts of groundwater recharge, which are normally required as upper boundary conditions in groundwater flow analyses, based on measurements of infiltrating water in the ground, to systematize the methods and establish systems which are stable and measurable on site over a long time. Regarding developing measurement systems, fiber-optic strain measurement methods that enable multiple-point and long-distance measurement were used for measuring three quantities: suction pressure, soil moisture and volumetric water content rate obtained by applying water absorption swelling material, and each measurement was discussed. The results showed that the fiber-optic soil aquameter has two types of practical application: one for measuring suction pressure (Type I), and the other for measuring volumetric water content rate obtained by applying water absorption swelling material (Type III). Furthermore, by using measurement instruments in actual fields, the validity of the two methods for estimating the rainfall infiltration capacities of shallow-layer soils, that is, estimating the capacities either directly by measurements of soil water or from unsaturated hydraulic conductivities, was confirmed.

Journal Articles

Estimation of infiltration amount from in-situ moisture measuring method in shallow ground

Komatsu, Mitsuru*; Nishigaki, Makoto*; Seno, Shoji*; Toida, Masaru*; Tagishi, Hirotaka*; Takenobu, Kazuyoshi*; Yamamoto, Yoichi

Chikasui Jiban Kankyo Ni Kansuru Shimpojium 2011 Happyo Rombunshu (CD-ROM), p.17 - 26, 2011/11

no abstracts in English

Journal Articles

Crystal structures of the regulatory subunit of Thr-sensitive aspartate kinase from ${it Thermus thermophilus}$

Yoshida, Ayako*; Tomita, Takeo*; Kono, Hidetoshi; Fushinobu, Shinya*; Kuzuyama, Tomohisa*; Nishiyama, Makoto*

FEBS Journal, 276(11), p.3124 - 3136, 2009/06

 Times Cited Count:14 Percentile:29.62(Biochemistry & Molecular Biology)

JAEA Reports

Draft of prospective plan of the Ningyo-toge Environmental Engineering Center

Annen, Sotonori; Tokizawa, Takayuki; Takanobu, Osamu; Takahashi, Makoto; Zaitsu, Tomohisa

JNC TN6400 2004-003, 57 Pages, 2004/03

JNC-TN6400-2004-003.pdf:1.94MB

The Ningyo-toge Environmental Engineering Center, the Japan Nuclear Cycle Development Institute had carried out research and development projects related to the front-end of the nuclear fuel cycle and has shifted its project to the environmental protection measures including decommissioning and dismantling facilities since reorganization in 1998. It was decided by the Japanese Government that a new entity would be established merging JNC and Japan Atomic Energy Research Institute, within the context of the overall reform of government-funded organizations by 2005. This draft of prospective plan of the Ningyo-toge has discussed because we are in the preparation phase for the merger with the discussion being made on the role and management of the new entity.

JAEA Reports

Evaluations of heavy nuclide data for JENDL-3.3

Kawano, Toshihiko*; Matsunobu, Hiroyuki*; Murata, Toru*; Zukeran, Atsushi*; Nakajima, Yutaka*; Kawai, Masayoshi*; Iwamoto, Osamu; Shibata, Keiichi; Nakagawa, Tsuneo; Osawa, Takaaki*; et al.

JAERI-Research 2003-026, 53 Pages, 2003/12

JAERI-Research-2003-026.pdf:2.48MB

New evaluations of neutron nuclear data for Uranium, Plutonium, and Thorium isotopes which are essential for applications to nuclear technology were carried out for the Japanese Evaluated Nuclear Data Library, JENDL-3.3. The objectives of the current release of JENDL were to fix several problems which have been reported for the previous version, to improve the accuracy of the data, and to evaluate covariances for the important nuclides. Quantities in JENDL-3.2 were extensively re-evaluated or replaced by more reliable values. The heavy nuclide data in JENDL-3.3 were validated with several benchmark tests, and it was reported that the current release gave a good prediction of criticalities.

Journal Articles

Japanese evaluated nuclear data library version 3 revision-3; JENDL-3.3

Shibata, Keiichi; Kawano, Toshihiko*; Nakagawa, Tsuneo; Iwamoto, Osamu; Katakura, Junichi; Fukahori, Tokio; Chiba, Satoshi; Hasegawa, Akira; Murata, Toru*; Matsunobu, Hiroyuki*; et al.

Journal of Nuclear Science and Technology, 39(11), p.1125 - 1136, 2002/11

 Times Cited Count:658 Percentile:96.97(Nuclear Science & Technology)

Evaluation for JENDL-3.3 has been performed by considering the accumulated feedback information and various benchmark tests of the previous library JENDL-3.2. The major problems of the JENDL-3.2 data were solved by the new library: overestimation of criticality values for thermal fission reactors was improved by the modifications of fission cross sections and fission neutron spectra for $$^{235}$$U; incorrect energy distributions of secondary neutrons from important heavy nuclides were replaced with statistical model calculations; the inconsistency between elemental and isotopic evaluations was removed for medium-heavy nuclides. Moreover, covariance data were provided for 20 nuclides. The reliability of JENDL-3.3 was investigated by the benchmark analyses on reactor and shielding performances. The results of the analyses indicate that JENDL-3.3 predicts various reactor and shielding characteristics better than JENDL-3.2.

JAEA Reports

Experimental comparison of calibration methods for measurement of reaction rate by using fission foils

Sakurai, Takeshi; ; Obu, Makoto; ; Kobayashi, Keiji*; Unesaki, Hironobu*

JAERI-M 93-153, 50 Pages, 1993/08

JAERI-M-93-153.pdf:1.31MB

no abstracts in English

JAEA Reports

Measurement of reaction rates in FCA XIV-cores simulating high conversion light water reactor

Obu, Makoto; ; Sakurai, Takeshi; Iijima, Susumu; *; Osugi, Toshitaka

JAERI-M 90-052, 52 Pages, 1990/03

JAERI-M-90-052.pdf:1.31MB

no abstracts in English

Journal Articles

Measurements of reaction rates in zone-type cores of fast critical assembly simulating high conversion light water reactor

Obu, Makoto; ; Iijima, Susumu; Sakurai, Takeshi; *

Journal of Nuclear Science and Technology, 26(11), p.993 - 1001, 1989/11

 Times Cited Count:10 Percentile:72.88(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Experimental study of nuclear characteristics of large axially heterogeneous core using fast critical assembly

Iijima, Susumu; Okajima, Shigeaki; Obu, Makoto; Osugi, Toshitaka; ; ; *

Journal of Nuclear Science and Technology, 26(2), p.221 - 230, 1989/02

no abstracts in English

Journal Articles

Experimental study of the large-scale axially heterogeneous liquid-metal fast breeder reactor at the fast critical assembly; Power distribution measurements and their analyses

Iijima, Susumu; Obu, Makoto; *; Ono, Akio; ; Okajima, Shigeaki

Nuclear Science and Engineering, 100, p.496 - 506, 1988/12

 Times Cited Count:2 Percentile:31.39(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Evaluation and adjustment of actinide cross sections using integral data measured at FCA

Okajima, Shigeaki; Mukaiyama, Takehiko; J.D.Kim*; Obu, Makoto;

Nuclear Data for Science and Technology, p.983 - 986, 1988/00

no abstracts in English

Journal Articles

Reactor physics experiments and analyses on high conversion light water reactor

Osugi, Toshitaka; Okajima, Shigeaki; Ono, Akio; Obu, Makoto; ;

Proc. ANS Int. Reactor Physics Conf., Vol. 2, p.361 - 370, 1988/00

no abstracts in English

JAEA Reports

Critical experiments and analysis of homogeneous heavy water system; 20% enriched U-D$$_{2}$$O reflector

Hirota, Jitsuya; Kuroi, Hideo; Goto, Yorio; Furuhashi, Akira; Yasuno, Takehiko; Yamamoto, Ken; Mitani, Hiroshi; Obu, Makoto; Ichimori, Toshihiro; Koyama, Kinji; et al.

JAERI 1034, 50 Pages, 1962/08

JAERI-1034.pdf:3.64MB

no abstracts in English

Oral presentation

Study on standardization of laser welding repair technologies for reactor components, 4; Development of sitering technique for weld materials using fiber laser and characteristics of residual stress/strain distribution

Shobu, Takahisa; Urushisaki, Yukinori*; Ichimura, Makoto*; Amaya, Koichi*; Yada, Hiroki; Takase, Kazuyuki; Muramatsu, Toshiharu

no journal, , 

no abstracts in English

Oral presentation

Estimating of in-situ hydraulic conductivity related with evaluating of rainfall infiltration behavior in shallow ground

Komatsu, Mitsuru*; Nishigaki, Makoto*; Seno, Shoji*; Tagishi, Hirotaka*; Takenobu, Kazuyoshi*; Kishi, Atsuyasu

no journal, , 

Infiltration rate at the ground surface is one of the essential boundary conditions for a quantitative evaluation of groundwater flow. Conventional method for quantifying infiltration rate based on the water budget, however, includes significant uncertainties resulting from different types of quantities to be measured. In this study, focusing on a method where the infiltration rate is estimated directly from temporal changes in soil water contents in the region of interest, the measurement data was confirmed based on the ${it in-situ}$ unsaturated hydraulic tests. Then, the reliability of the measurement was verified by comparing the ${it in-situ}$ data to the laboratory test results and uncertainties associated with the ${it in-situ}$ measurements were quantified.

Oral presentation

Confirmation of the performance test of the optical fiber moisture metering sensor

Seno, Shoji*; Komatsu, Mitsuru*; Nishigaki, Makoto*; Tagishi, Hirotaka*; Takenobu, Kazuyoshi*; Kishi, Atsuyasu

no journal, , 

The soil moisture measurement method is being developed with the application of the optical fiber sensor, that is thought to be more advantageous than the conventional methods in the soil moisture measurement regarding its characteristics of multiple-point and long-distance measurement. We report the results obtained in the performance test of the optical fiber moisture metering sensor in the course where its fundamental mechanism and its principle are being developed.

Oral presentation

Current status of the JAEA's Fukushima R&D bases for the decommissioning of the Fukushima Daiichi Nuclear Power Station

Shobu, Nobuhiro; Ooka, Makoto; Nakai, Toshiro; Nakayama, Shinichi

no journal, , 

The Japan Atomic Energy Agency (JAEA) is operating and constructing R&D bases at the coastal area of the Fukushima Prefecture for the decommissioning of the Fukushima Daiichi Nuclear Power Station (NPS) of the Tokyo Electric Power Company Holdings, Inc. (TEPCO). This paper reports current status of the R&D bases.

Oral presentation

Residual stress evaluation of solid particle deposition material by synchrotron radiation X-ray diffraction

Morooka, Satoshi; Ma, N.*; Watanabe, Makoto*; Sasaki, Miki; Tominaga, Aki; Shobu, Takahisa

no journal, , 

no abstracts in English

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