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Journal Articles

Analytical study of the applicability of FeCrAl-ODS cladding for BWR

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 9$$times$$9 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$$_{2}$$ 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.

Journal Articles

Cross-checking groundwater age by $$^{4}$$He and $$^{14}$$C dating in a granite, Tono area, central Japan

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 $$^{4}$$He and $$^{14}$$C methods in granite of the Tono area in central Japan. Groundwater was sampled at 30 packed-off sections of six 1000-m boreholes. $$^{4}$$He concentrations increased and $$^{14}$$C concentrations decreased along a groundwater flow path on a topographic gradient. $$^{4}$$He ages were calculated by using the in situ $$^{4}$$He production rate derived from the porosity, density, and U and Th content of the rock, neglecting external flux. The linear relation between the $$^{4}$$He ages and the noncorrected $$^{14}$$C ages, except in the discharge area. Simultaneous measurements make it feasible to estimate the accumulation rate of $$^{4}$$He and initial dilution of $$^{14}$$C, which cannot be done with a single method. Cross-checking groundwater dating has the potential to provide more reliable groundwater ages.

Journal Articles

Adsorption of Db and its homologues Nb and Ta, and the pseudo-homologue Pa on anion-exchange resin in HF solution

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 $$^{248}$$Cm($$^{19}$$F, 5n)$$^{262}$$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$$_{d}$$) 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 $$approx$$ Nb $$>$$ Db $$geq$$ Pa.

Journal Articles

Studies of fast-ion transport induced by energetic particle modes using fast-particle diagnostics with high time resolution in CHS

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

JAEA Reports

Separstion analysis work of the pore water pressure response fo MP system observation data

Goto, Kazuyuki*

JNC TJ7430 2005-007, 517 Pages, 2003/03

JNC-TJ7430-2005-007.pdf:47.07MB

no abstracts in English

JAEA Reports

None

*; *; *; *

JNC TJ7440 99-016, 120 Pages, 1999/03

JNC-TJ7440-99-016.pdf:0.74MB

no abstracts in English

JAEA Reports

None

*; *; *; *

JNC TJ7440 99-001, 151 Pages, 1999/01

JNC-TJ7440-99-001.pdf:10.35MB

no abstracts in English

JAEA Reports

None

*

PNC TJ7439 98-002, 23 Pages, 1998/03

PNC-TJ7439-98-002.pdf:1.3MB

None

Journal Articles

Development of B$$_{4}$$C-carbon fiber composite ceramics as plasma facing materials in nuclear fusion reactor, part 3; Heat resistance evaluation by electron beam irradiation and by in situ plasma discharge in JT-60

*; 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

JAEA Reports

None

Hirata, Yoichi*; *; *; *; *

PNC TJ7439 97-004, 312 Pages, 1997/08

PNC-TJ7439-97-004.pdf:13.58MB

None

JAEA Reports

None

Hirata, Yoichi*; *; *; *

PNC TJ7439 97-001, 46 Pages, 1997/02

PNC-TJ7439-97-001.pdf:4.13MB

None

Journal Articles

Development of B$$_{4}$$C-carbon fiber composite ceramics as plasma facing materials in nuclear fusion reactor, 3; Heat resistance evaluation by electron beam irradiation and by in situ plasma discharge in JT-60

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

JAEA Reports

None

*; *; *

PNC TJ7439 96-005, 83 Pages, 1996/12

PNC-TJ7439-96-005.pdf:1.52MB

no abstracts in English

JAEA Reports

None

Hirata, Yoichi*; *; *

PNC TJ7439 96-003, 83 Pages, 1996/11

PNC-TJ7439-96-003.pdf:9.62MB

no abstracts in English

JAEA Reports

None

Hirata, Yoichi*; *; *

PNC TJ7439 96-002, 88 Pages, 1996/03

PNC-TJ7439-96-002.pdf:2.7MB

no abstracts in English

Journal Articles

New composite composed of boron carbide and carbon fiber with high thermal conductivity for first wall

*; 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

Journal Articles

Irradiation induced stress relaxation and high temperature doformation behavior of neutron irradiated Ti based shape memory alloys

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

Journal Articles

Effect of neutron irradiation on deformation behavior in TiPd-Cr high temperature shape memory alloys

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

JAEA Reports

Underground Water Direction and Velocity Sounding at AN-8 Borehole

Hirata, Yoichi*; Matsumoto, Eiken*; Goto, Kazuyuki*

JNC TJ7440 2005-061, 36 Pages, 1991/03

JNC-TJ7440-2005-061.PDF:6.6MB

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.

JAEA Reports

Hydraulic Test at AN-8 Borehole

Hirata, Yoichi*; Goto, Kazuyuki*; Matsumoto, Eiken*

JNC TJ7440 2005-063, 50 Pages, 1990/08

JNC-TJ7440-2005-063.PDF:6.97MB

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.

29 (Records 1-20 displayed on this page)