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Niwa, Masakazu; Nomura, Katsuhiro; Hiura, Yuki
JAEA-Review 2018-010, 40 Pages, 2018/04
JAEA-Review-2018-010.pdf:6.11MB
JAEA-Review-2018-010-appendix(CD-ROM).zip:36.31MB
In the Japanese Islands, coastal area can be proposed as an investigation site for geological disposal of high-level radioactive wastes. For an assessment of fault activity in coastal area, offshore surveys such as acoustic profiling and boring should be examined as well as inland surveys. In addition, adequate understanding spatial distributions and characteristics of faults in the coastal area of Japan will contribute to safety assessment for the geological disposal in such area. In this report, we collected and compiled previous studies focused on spatial distribution, continuity, timing of displacement and recurrence interval of faults near coastline, specifically faults along or across a boundary between land and sea, and technologies of survey and assessment for them.
Otani, Hiroshi; Mizui, Hiroyuki; Higashiura, Norikazu; Bando, Fumio*; Endo, Nobuyuki*; Yamagishi, Ryuichiro*; Kume, Kyo*
Heisei-25-Nendo Koeki Zaidan Hojin Wakasawan Enerugi Kenkyu Senta kenkyu Nempo, 16, P. 66, 2014/10
no abstracts in English
Nishiura, Masaya*; Toba, Shiori*; Takao, Daisuke*; Miyashiro, Daisuke*; Sakakibara, Hitoshi*; Matsuo, Tatsuhito; Kamimura, Shinji*; Oiwa, Kazuhiro*; Yagi, Naoto*; Iwamoto, Hiroyuki*
Journal of Structural Biology, 178(3), p.329 - 337, 2012/06
Times Cited Count：3 Percentile：8.69(Biochemistry & Molecular Biology)We report the first X-ray diffraction patterns recorded from single axonemes of eukaryotic flagella with a diameter of only 
0.2 
m, by using the technique of cryomicrodiffraction. A spermatozoon isolated from Drosophila melanogaster, was mounted straight in a glass capillary, quickly frozen and its 800-m segment was irradiated end-on with intense synchrotron radiation X-ray microbeams (diameter, 2 m) at 74 K. Well-defined diffraction patterns were recorded, consisting of a large number of isolated reflection spots. The patterns had features of an 18-fold rotational symmetry as expected from the axonemal structure. The diffraction patterns were compared with the results of model calculations based on a published electron micrograph of the Drosophila axoneme. The comparison provided information on the native state of axoneme, including estimates of axonemal diameter and interdoublet spacing.
Aizawa, Hideyuki*; Katagiri, Genichi*; Sano, Kazuya; Higashiura, Norikazu
Fuji Denki Homu Peji and Fuji Denki America Sha Homu Peji (Internet), 11 Pages, 2012/04
In a nuclear power plant, spent IXR (hereafter called SR), low-level radioactive waste, is produced from water purification systems in association with the operation of the plant. These SR are different in a radioactive concentration depending on purification systems, and SR which is relatively higher in the radioactivity concentration is stored in the nuclear power plant. Stored amounts continue to increase year after year. In Japan, it is planned that SR will be buried in the ground in the future as a "waste solid" which is solidified in a specific metal container. In terms of securing long-term soundness of the waste solids, it is said the solidification of the SR is required after stabilization treatment is performed. Moreover, SR with high radioactivity concentration requires higher disposal expenses; therefore, the reduction of the disposal volume is required in terms of cost-cutting. To realize these requirements, processing technologies are required which satisfy both the volume reduction and stabilization of the SR at once. Fuji Electric is continuing to develop LPOP technology and the equipment (FRR: Fuji Resin Reducer) as technologies to respond to these requirements. LPOP treatment is a technology enabling realization of both volume reduction and stabilization of SR which is low-level radioactive waste. Fuji Electric post the overview of LPOP technology and the results of mineralization of ion exchange resin and solidification tests executed for the purpose of evaluating the effect of LPOP treatment aiming the burial disposal on our website.
Hamada, Nobuyuki; Watanabe, Junji; Higashiura, Norikazu; Shime, Masanori
Dekomisshoningu Giho, (45), p.2 - 9, 2012/03
The manual type wet blast apparatus had been introduced to remove the surface contaminations of the radioactive waste, as the preprocessing for the clearance. Decontamination test had been carried out to survey the optimum condition for the decontamination with using specimens obtained from facilities and equipments which will be planned to be cleared. As the results, we confirmed that the apparatus has the performance to reduce the surface radioactive concentration on the inside of the tube to under the clearance level within relatively short time.
Isobe, Mitsutaka*; Toi, Kazuo*; Matsushita, Hiroyuki*; Goto, Kazuyuki*; Suzuki, Chihiro*; Nagaoka, Kenichi*; Nakajima, Noriyoshi*; Yamamoto, Satoshi*; Murakami, Sadayoshi*; Shimizu, Akihiro*; et al.
Nuclear Fusion, 46(10), p.S918 - S925, 2006/10
Times Cited Count：30 Percentile：69.47(Physics, Fluids & Plasmas)no abstracts in English
Hiura, Nobuo*; Yamaura, Takayuki; Motohashi, Yoshinobu*; Kobiyama, Mamoru*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 1(2), p.202 - 208, 2002/06
The purpose of this study is to develop oxygen sensor which can measure the oxygen potential of the fuel in a nuclear reactor. The oxygen sensor with CaO stabilized zirconia solid electrolyte has been specially designed in order to prolong its life time. Electromotive force (EMF) of solid galvanic cell Ni/NiO|ZrO
-CaO|Fe/FeO was measured in both the out-pile tests and the in-situ tests using Japan Material Testing Reactor (JMTR), and the characteristics of EMF was discussed. In the out-pile test, it was found that the EMF was almost equal to the theoretical values at temperatures ranging from 700 to 1,000
, and the life span of the sensor was very long up to 980h at 800. In the in-situ test, it was found that the EMF showed almost the reliable values up to 300 h (neutron fluence (E 
1 MeV) 1.5
10
m
), at temperatures from 700 to 900. The imprecision of the EMF was found to be within 6% of the theoretical values up to 1,650 h irradiation time (neutron fluence (E 1 MeV) 8.010 m) at 800. The oxygen sensors were found to be applicable for the oxygen potential measurement of the fuels in a reactor.
Maekawa, Keisuke; Hara, Akio*; Hiura, Yuki*; Hou, J.-Y.*; Kato, Arata*
no journal, ,
no abstracts in English
Hamada, Nobuyuki; Watanabe, Junji; Higashiura, Norikazu; Shime, Masanori
no journal, ,
no abstracts in English
Otani, Hiroshi; Higashiura, Norikazu; Mizui, Hiroyuki; Endo, Nobuyuki*; Katagiri, Genichi*; Oshio, Tadashi*; Ogawa, Hideo*
no journal, ,
no abstracts in English
Mizui, Hiroyuki; Otani, Hiroshi; Higashiura, Norikazu; Onozaki, Kimihiro*; Katagiri, Genichi*; Endo, Nobuyuki*; Ogawa, Hideo*; Kaneda, Yoshihisa*
no journal, ,
The applicable prospect for spent resin disposal including inhibitor was acquired by basic test of using low pressure oxygen plasma method.
Suzuki, Shizuo*; Nagai, Masaru*; Koarashi, Jun; Atarashi-Andoh, Mariko; Yokozawa, Masayuki*; Hara, Toshihiko*; Hiura, Tsutomu*; Watanabe, Hiroshi*; Namimatsu, Kanae*; Tako, Yasuhiro*; et al.
no journal, ,
no abstracts in English
Komatsu, Tetsuya; Hiura, Yuki; Izumida, Atsuto*; Takahashi, Takayuki*; Funatsu, Taro*; Muraki, Masahiro*; Hozo, Renya*; Sugai, Toshihiko*
no journal, ,
no abstracts in English
Komatsu, Tetsuya; Takahashi, Takayuki*; Funatsu, Taro*; Muraki, Masahiro*; Hiura, Yuki; Sugai, Toshihiko*
no journal, ,
no abstracts in English
Hiura, Yuki; Komatsu, Tetsuya; Sugai, Toshihiko*
no journal, ,
no abstracts in English
Komatsu, Tetsuya; Hiura, Yuki; Takahashi, Takayuki*; Funatsu, Taro*; Muraki, Masahiro*; Kimori, Taiga*; Sugai, Toshihiko*
no journal, ,
no abstracts in English
Komatsu, Tetsuya; Sueoka, Shigeru; Hiura, Yuki; Kitamura, Yo*; Sanga, Tomoji*
no journal, ,
no abstracts in English
- 10
years in the Japanese IslandsHiura, Yuki; Komatsu, Tetsuya; Sueoka, Shigeru; Kitamura, Yo*; Sanga, Tomoji*
no journal, ,
Distribution map of erosion rates on geological timescales should be prepared to evaluate the long-term stability of geological environments. Previous distribution maps of erosion rates were constructed based on deposition rates in artificial dams on multi-decadal timescales. This study aims to construct a new distribution map of erosion rates on timescales of 10 - 10 years by using reported data derived from terrestrial cosmogenic nuclide (TCN) methods. This study presents the method for constructing the new distribution map of erosion rate and the results of comparing it with the previous one.
Miyamoto, Tatsuki*; Sugai, Toshihiko*; Komatsu, Tetsuya; Nakanishi, Toshimichi*; Niwa, Yuichi*; Hiura, Yuki
no journal, ,
no abstracts in English
Sueoka, Shigeru; Komatsu, Tetsuya; Hiura, Yuki
no journal, ,
no abstracts in English
