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Takano, Sho*; Kusagaya, Kazuyuki*; Goto, Daisuke*; Sakamoto, Kan*; Yamashita, Shinichiro
Proceedings of 2017 Water Reactor Fuel Performance Meeting (WRFPM 2017) (USB Flash Drive), 10 Pages, 2017/09
We focused on one of accident tolerant fuel (ATF) materials, Oxide Dispersion Strengthened Fe-Cr-Al Steel (FeCrAl-ODS). There is a reasonable prospect that FeCrAl-ODS is applied to BWRs, but relatively high neutron absorption should be compensated. To decrease adverse neutron economic impact, thin FeCrAl-ODS cladding was designed, and we evaluated characteristics of a core into which 99 Advanced BWR (ABWR) bundles with thin FeCrAl-ODS claddings were loaded. Thin FeCrAl-ODS water rods and channel boxes were also applied. We confirmed that FeCrAl-ODS core reactivity was sufficient by increasing enrichment of UO fuel under the limit of 5 wt%. Moreover, some representative FeCrAl-ODS core characteristics were comparable to zircaloy core. We also confirmed that fuel thermal-mechanical behaviors of thin FeCrAl-ODS cladding at normal operation and transient conditions were acceptable. These results led to a conclusion that FeCrAl-ODS was applicable to BWR in the analysis range of this study.
Hasegawa, Takuma*; Nakata, Kotaro*; Tomioka, Yuichi*; Goto, Kazuyuki*; Kashiwaya, Koki*; Hama, Katsuhiro; Iwatsuki, Teruki; Kunimaru, Takanori*; Takeda, Masaki
Geochimica et Cosmochimica Acta, 192, p.166 - 185, 2016/11
Times Cited Count:9 Percentile:35.91(Geochemistry & Geophysics)Groundwater dating was performed simultaneously by the He and C methods in granite of the Tono area in central Japan. Groundwater was sampled at 30 packed-off sections of six 1000-m boreholes. He concentrations increased and C concentrations decreased along a groundwater flow path on a topographic gradient. He ages were calculated by using the in situ He production rate derived from the porosity, density, and U and Th content of the rock, neglecting external flux. The linear relation between the He ages and the noncorrected C ages, except in the discharge area. Simultaneous measurements make it feasible to estimate the accumulation rate of He and initial dilution of C, which cannot be done with a single method. Cross-checking groundwater dating has the potential to provide more reliable groundwater ages.
Tsukada, Kazuaki; Haba, Hiromitsu*; Asai, Masato; Toyoshima, Atsushi; Akiyama, Kazuhiko*; Kasamatsu, Yoshitaka; Nishinaka, Ichiro; Ichikawa, Shinichi; Yasuda, Kenichiro; Miyamoto, Yutaka; et al.
Radiochimica Acta, 97(2), p.83 - 89, 2009/02
Times Cited Count:20 Percentile:77.91(Chemistry, Inorganic & Nuclear)Anion-exchange chromatography of element 105, dubnium (Db), produced in the Cm(F, 5n)Db reaction is investigated together with the homologues Nb and Ta, and the pseudo-homologue Pa in 13.9 M hydrofluoric acid (HF) solution. The distribution coefficient (K) of Db on an anion-exchange resin is successfully determined by running cycles of the 1702 chromatographic column separations. The result clearly indicates that the adsorption of Db on the resin is significantly different from that of the homologues and that the adsorption of anionic fluoro complexes of these elements decreases in the sequence of Ta Nb Db Pa.
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:69.56(Physics, Fluids & Plasmas)no abstracts in English
Goto, Kazuyuki*
JNC TJ7430 2005-007, 517 Pages, 2003/03
no abstracts in English
*; Saido, Masahiro; Nakamura, Kazuyuki; Akiba, Masato; ; Dairaku, Masayuki; *; *; *; Goto, Yoshitaka*
Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 105(1228), p.1091 - 1098, 1997/12
Times Cited Count:1 Percentile:18.7(Materials Science, Ceramics)no abstracts in English
Jimbo, Ryutaro*; Saido, Masahiro; Nakamura, Kazuyuki; Akiba, Masato; ; Dairaku, Masayuki; *; *; *; *
Journal of the Ceramic Society of Japan, International Edition, 105, p.1179 - 1187, 1997/00
no abstracts in English
*; Saido, Masahiro; Nakamura, Kazuyuki; Akiba, Masato; ; Goto, Yoshitaka*; *; *; Yamaki, Takahiro*; *; et al.
Journal of Nuclear Materials, 233-237(PT.A), p.781 - 786, 1996/00
Times Cited Count:13 Percentile:72.41(Materials Science, Multidisciplinary)no abstracts in English
Hoshiya, Taiji; Goto, Ichiro; Omi, Masao; Ando, Hiroei; *; *
Journal of Nuclear Materials, 212-215, p.818 - 822, 1994/00
Times Cited Count:3 Percentile:35.85(Materials Science, Multidisciplinary)no abstracts in English
Hoshiya, Taiji; Goto, Ichiro; Omi, Masao; Ando, Hiroei; *; *
Shape Memory Materials and Hydrides (Trans. of Materials Research Soc. Jpn., Vol. 18B), 0, p.1025 - 1028, 1994/00
no abstracts in English
Hirata, Yoichi*; Matsumoto, Eiken*; Goto, Kazuyuki*
JNC TJ7440 2005-061, 36 Pages, 1991/03
This paper describes the measurement result of underground water direction and velocity with Type LD-60 at AN-8 borehole. The investigation site including AN-8 is in Tsukiyoshi area Akiyo-chou, Mizunami city Gifu pref.The measurement rock bed is conglomerate that is classified Mizunami group, Akeyo Toki coal-bearing formation.The measurement result is as follows. (1) The underground water velocities are from 0.00012 to 0.0000032cm/s. (2) The underground water direction at GL-25.85m and GL-45.35m is east, and at GL-37.60m and GL-38.60m is west. (3) The rock beds that flows is toward east is thin, the thickness of these are from 20 to 50cm.The measurement sections that flow toward west are located in one rock bed which thickness is about 170cm, and these velocities are faster than others.
Hirata, Yoichi*; Goto, Kazuyuki*; Matsumoto, Eiken*
JNC TJ7440 2005-063, 50 Pages, 1990/08
This paper describes the result of hydraulic test with PNC Aquifer Test Method in Akeyo formation at AN-8 borehole. PNC Aquifer Test Method can measure permeability and pore water pressure. The investigation site is located in Tsukiyoshi, Akeyo, Mizunami City Gifu prefecture.The testing result is as follows.(1)The difference of pore water pressure at the section from GL-9.4m to GL-11.9m and at the section from GL-8.9m to GL-11.4m is rather small. Pore water pressure at the depth at the section from GL-11.9m to GL-14.4m is lower than others.(2)Permeability is computed by two theories. One of them is Hvorslev's theory and other is Cooper's theory. Using both theories, there are few variation between at from GL-9.4m to GL-11.9m and at from GL-8.9m to GL-11.4m. But at the depth at from GL-11.9m to GL-14.4m, there is some variation.(3)Permeability at from GL-8.9m to GL-11.4m is about twice as large as the ones at from GL-9.4m to GL-11.9m.