Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
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.
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
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.
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
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)Annen, Sotonori; Tokizawa, Takayuki; Takanobu, Osamu; Takahashi, Makoto; Zaitsu, Tomohisa
JNC TN6400 2004-003, 57 Pages, 2004/03
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.
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
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.
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 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.
Sakurai, Takeshi; ; Obu, Makoto; ; Kobayashi, Keiji*; Unesaki, Hironobu*
JAERI-M 93-153, 50 Pages, 1993/08
no abstracts in English
Obu, Makoto; ; Sakurai, Takeshi; Iijima, Susumu; *; Osugi, Toshitaka
JAERI-M 90-052, 52 Pages, 1990/03
no abstracts in English
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
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
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
Okajima, Shigeaki; Mukaiyama, Takehiko; J.D.Kim*; Obu, Makoto;
Nuclear Data for Science and Technology, p.983 - 986, 1988/00
no abstracts in English
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
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
no abstracts in English
Shobu, Takahisa; Urushisaki, Yukinori*; Ichimura, Makoto*; Amaya, Koichi*; Yada, Hiroki; Takase, Kazuyuki; Muramatsu, Toshiharu
no journal, ,
no abstracts in English
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 unsaturated hydraulic tests. Then, the reliability of the measurement was verified by comparing the data to the laboratory test results and uncertainties associated with the measurements were quantified.
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.
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.
Morooka, Satoshi; Ma, N.*; Watanabe, Makoto*; Sasaki, Miki; Tominaga, Aki; Shobu, Takahisa
no journal, ,
no abstracts in English