JOPSS - Search Results

Journal Articles

Sintering and microstructural behaviors of mechanically blended Nd/Sm-doped MOX

Hirooka, Shun; Horii, Yuta; Sunaoshi, Takeo*; Uno, Hiroki*; Yamada, Tadahisa*; Vauchy, R.; Hayashizaki, Kohei; Nakamichi, Shinya; Murakami, Tatsutoshi; Kato, Masato

Journal of Nuclear Science and Technology, 60(11), p.1313 - 1323, 2023/11

https://doi.org/10.1080/00223131.2023.2192725

Times Cited Count：5 Percentile：78.63(Nuclear Science & Technology)

Additive MOX pellets are fabricated by a conventional dry powder metallurgy method. Nd $_{2}$ O $_{3}$ and Sm $_{2}$ O $_{3}$ are chosen as the additive materials to simulate the corresponding soluble fission products dispersed in MOX. Shrinkage curves of the MOX pellets are obtained by dilatometry, which reveal that the sintering temperature is shifted toward a value higher than that of the respective regular MOX. The additives, however, promote grain growth and densification, which can be explained by the effect of oxidized uranium cations covering to a pentavalent state. Ceramography reveals large agglomerates after sintering, and Electron Probe Micro-Analysis confirms that inhomogeneous elemental distribution, whereas XRD reveals a single face-centered cubic phase. Finally, by grinding and re-sintering the specimens, the cation distribution homogeneity is significantly improved, which can simulate spent nuclear fuels with soluble fission products.

Journal Articles

Correlation of crystal structures with electric field gradients in the fluorite- and pyrochlore-type compounds in the Gd $_{2}$ O $_{3}$ -ZrO $_{2}$ system

Wang, J.*; Otobe, Haruyoshi; Nakamura, Akio; Takeda, Masuo*

Journal of Solid State Chemistry, 176(1), p.105 - 110, 2003/11

https://doi.org/10.1016/S0022-4596(03)00353-0

Times Cited Count：14 Percentile：43.66(Chemistry, Inorganic & Nuclear)

no abstracts in English

Journal Articles

Structural properties of the fluorite- and pyrochlore-type compounds in the Gd $_{2}$ O $_{3}$ -ZrO $_{2}$ system xGdO $_{1.5}$ -(1-x)ZrO $_{2}$ with 0.18 x 0.62

Wang, J.*; Nakamura, Akio; Takeda, Masuo*

Solid State Ionics, 164(3-4), p.185 - 191, 2003/11

https://doi.org/10.1016/j.ssi.2003.09.003

Times Cited Count：36 Percentile：79.79(Chemistry, Physical)

no abstracts in English

Journal Articles

Development of remote handling apparatus for measuring thermal diffusivity

; Nishino, Yasuharu; Yamahara, Takeshi;

Proc. of 43rd Conf. on Robotics and Remote Systems 1995, 0, p.75 - 80, 1996/00

no abstracts in English

Journal Articles

Development of remote-handling apparatus for measuring thermal diffusivity

; Nishino, Yasuharu; Yamahara, Takeshi;

Transactions of the American Nuclear Society, 73, p.465 - 466, 1995/00

no abstracts in English

Journal Articles

Effect of -ray irradiation on in-situ electrical conductivity of ZrO $_{2}$ -10mol% Gd $_{2}$ O $_{3}$ single crystal at elevated temperatures

Kang, T.-K.*; Kuk, I.-H.*; Katano, Yoshio; Igawa, Naoki; Ono, Hideo

Journal of Nuclear Materials, 209(3), p.321 - 325, 1994/05

https://doi.org/10.1016/0022-3115(94)90270-4

no abstracts in English

Journal Articles

Luminescence study on determination of the hydration number of Cm(III)

Kimura, Takaumi; Choppin, G. R.*

Journal of Alloys and Compounds, 213-214, p.313 - 317, 1994/00

https://doi.org/10.1016/0925-8388(94)90921-0

Times Cited Count：273 Percentile：99.70(Chemistry, Physical)

no abstracts in English

Journal Articles

Electrical properties of cubic, stabilized, single ZrO $_{2}$ -Gd $_{2}$ O $_{3}$ crystals

T.Kang*; Nagasaki, Takanori; Igawa, Naoki; K.Il-Hium*; Ono, Hideo

Journal of the American Ceramic Society, 75(8), p.2297 - 2299, 1992/08

https://doi.org/10.1111/j.1151-2916.1992.tb04500.x

Times Cited Count：17 Percentile：67.60(Materials Science, Ceramics)

no abstracts in English

JAEA Reports

Evalution of Energy Deposition in Various Test Fuel Rods in the NSRR Experiments

;

JAERI-M 85-208, 53 Pages, 1986/01

JAERI-M-85-208.pdf:1.61MB

no abstracts in English

Journal Articles

Phase relations in the systems ZrO $_{2}$ -Y $_{2}$ O $_{3}$ -Nd $_{2}$ O $_{3}$ and ZrO $_{2}$ -Y $_{2}$ O $_{3}$ -CeO $_{2}$

;

Mater.Res.Bull., 21, p.1343 - 1349, 1986/00

https://doi.org/10.1016/0025-5408(86)90069-3

Times Cited Count：31 Percentile：79.48(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

The Effect of different concentrations of deuterium oxide on rice seedlingshoot and root tissue water

;

Environ.Exp.Bot., 24(4), p.369 - 375, 1984/00

https://doi.org/10.1016/0098-8472(84)90033-9

Times Cited Count：0 Percentile：0.00(Plant Sciences)

no abstracts in English

Journal Articles

Absorption of phosphate by rice seedlings in deuterium oxide

;

Environ.Exp.Bot., 23(4), p.361 - 364, 1983/00

https://doi.org/10.1016/0098-8472(83)90011-4

Times Cited Count：2 Percentile：22.10(Plant Sciences)

no abstracts in English

JAEA Reports

FIR-Laser Scattering for JT-60

; ; ;

JAERI-M 7295, 39 Pages, 1977/09

JAERI-M-7295.pdf:1.18MB

no abstracts in English

Journal Articles

The Reactions of recoil tritium atoms with water

Tachikawa, Enzo;

Journal of Inorganic and Nuclear Chemistry, 38(2), p.193 - 196, 1976/02

https://doi.org/10.1016/0022-1902(76)80390-9

Times Cited Count：15

no abstracts in English

Journal Articles

The Reactions of recoil tritium atoms with water, 2; Reactivity integral- and moderator-isotope effects in H $_{2}$ O-D $_{2}$ O binary mixtures

Tachikawa, Enzo;

Bulletin of the Chemical Society of Japan, 48(7), p.2182 - 2184, 1975/07

https://doi.org/10.1246/bcsj.48.2182

Times Cited Count：6

no abstracts in English

Journal Articles

Measurement of neutron life in a D $_{2}$ O-system by neutron fluctuation

Journal of Nuclear Science and Technology, 1(6), p.193 - 196, 1964/00

https://doi.org/10.3327/jnst.1.193

no abstracts in English

Oral presentation

The Influence of Gd content on the properties of simulated fuel debris

Akashi, Masatoshi; Hirooka, Shun; Watanabe, Masashi; Komeno, Akira; Morimoto, Kyoichi

no journal, ,

Uranium oxide fuels containing Gd $_{2}$ O $_{3}$ had been used to control fuel power in reactors of the Fukushima Daiichi Nuclear Power Plant where the severe accident occurred in 2011. JAEA has been evaluating physical properties of the molten fuel debris in the damaged core. However physical properties of the fuel debris containing Gd are not known, hence it is very difficult to select an appropriate debris removal method. Especially, it is important to know the distribution of Gd in the molten fuels for the evaluation of nuclear criticality safety during removal work. In this study, simulated samples of the molten fuel debris, which consisted of ZrO $_{2}$ , UO $_{2}$ and Gd $_{2}$ O $_{3}$ , were prepared and their properties, which are density, crystal structure, thermal conductivity, thermal expansion and melting temperature, were investigated. This study includes results obtained under the research program entrusted to International Research Institute for Nuclear Decommissioning including Japan Atomic Energy Agency by Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry (METI) of Japan.

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Sintering and microstructural behaviors of mechanically blended Nd/Sm-doped MOX

Correlation of crystal structures with electric field gradients in the fluorite- and pyrochlore-type compounds in the Gd $_{2}$ O $_{3}$ -ZrO $_{2}$ system

Structural properties of the fluorite- and pyrochlore-type compounds in the Gd $_{2}$ O $_{3}$ -ZrO $_{2}$ system xGdO $_{1.5}$ -(1-x)ZrO $_{2}$ with 0.18 x 0.62

Development of remote handling apparatus for measuring thermal diffusivity

Development of remote-handling apparatus for measuring thermal diffusivity

Effect of -ray irradiation on in-situ electrical conductivity of ZrO $_{2}$ -10mol% Gd $_{2}$ O $_{3}$ single crystal at elevated temperatures

Luminescence study on determination of the hydration number of Cm(III)

Electrical properties of cubic, stabilized, single ZrO $_{2}$ -Gd $_{2}$ O $_{3}$ crystals

Evalution of Energy Deposition in Various Test Fuel Rods in the NSRR Experiments

Phase relations in the systems ZrO $_{2}$ -Y $_{2}$ O $_{3}$ -Nd $_{2}$ O $_{3}$ and ZrO $_{2}$ -Y $_{2}$ O $_{3}$ -CeO $_{2}$

The Effect of different concentrations of deuterium oxide on rice seedlingshoot and root tissue water

Absorption of phosphate by rice seedlings in deuterium oxide

FIR-Laser Scattering for JT-60

The Reactions of recoil tritium atoms with water

The Reactions of recoil tritium atoms with water, 2; Reactivity integral- and moderator-isotope effects in H $_{2}$ O-D $_{2}$ O binary mixtures

Measurement of neutron life in a D $_{2}$ O-system by neutron fluctuation

The Influence of Gd content on the properties of simulated fuel debris