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Journal Articles

Validation of PHITS spallation models from the perspective of the shielding design of transmutation experimental facility

Iwamoto, Hiroki; Meigo, Shinichiro

EPJ Web of Conferences, 153, p.01016_1 - 01016_9, 2017/09

 Times Cited Count:2 Percentile:11.38

Journal Articles

Influences of humid substances, alkaline conditions and colloids on radionuclide migration in natural barrier

Mukai, Masayuki; Ueda, Masato; Inada, Daisuke; Yukawa, Kazuhiko; Maeda, Toshikatsu; Iida, Yoshihisa

Proceedings of International Symposium NUCEF 2005, p.219 - 224, 2005/08

For better quantitative understanding of radionuclide migration for safety assessment of geologic disposal, JAERI has been conducting experimental and modeling studies on influences of humic substances, highly alkaline conditions and colloids on sorptive and diffusional behavior of TRU in geologic materials. In the absence of fulvic acid, one of humic substances, diffusion of Am through a tuff sample was not detected. By adding fulvic acid, Am was detected in the downstream cell, which indicates the diffusion through the sample. Highly alkaline conditions arisen from cementitious materials may spread by altering chemical and physical properties of geologic materials. Through-diffusion experiments of alkaline species in granite showed that the effective diffusion coefficient of Ca$$^{2+}$$ and OH$$^{-}$$ in a cement-equilibrated aqueous solution were found to be higher by almost two orders of magnitude than Na$$^{+}$$ and OH$$^{-}$$ in a NaOH solution. Radionuclide migration can be enhanced by colloids, and thus a calculation code describing the effect of colloids on radionuclide migration has been required.

JAEA Reports

Activity report of the Fusion Neutronics Source from April 1, 2001 to March 31, 2004

Fusion Neutron Laboratory

JAERI-Review 2004-017, 163 Pages, 2004/07

JAERI-Review-2004-017.pdf:25.47MB

no abstracts in English

Journal Articles

Experimental study on thermal-hydraulics and neutronics coupling effect on flow instability in a heated channel with THYNC facility

Iguchi, Tadashi; Shibamoto, Yasuteru; Asaka, Hideaki; Nakamura, Hideo

Proceedings of 10th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-10), 16 Pages, 2003/10

Thermal-hydraulic and neutronic dynamics are always interrelated in BWR core. This is called thermal-hydraulic and neutronic (T/N) coupling. Channel stability experiments with T/N coupling under non-nuclear condition are very limited. This is mainly due to the difficulties in the real-time simulation of neutron dynamics and in the fast-response void fraction measurement under high-pressure and temperature conditions. Authors have developed techniques to solve the above difficulties, and have succeeded in experimentally simulating T/N coupling under non-nuclear conditions with the THYNC facility. Using THYNC facility, T/N coupling effect on channel stability was investigated. Experiments were performed under Pressure=2-7MPa, Subcooling=10-40K, and Mass flux=270-660kg/m$$^{2}$$s. THYNC results indicated T/N coupling lowered the channel stability threshold. The reduction of channel stability threshold due to T/N coupling was small within 10% at 7MPa in the present THYNC experiment, although the experimental condition was set to be more severe than that supposed in a reactor.

Journal Articles

Effects of grain size and PCI restraint on the rim structure formation of UO$$_{2}$$ fuels

Une, Katsumi*; Nogita, Kazuhiro*; Suzaka, Yojiro*; Hayashi, Kimio; Ito, Kunio*; Eto, Yoshinori*

International Topical Meeting on Light Water Reactor Fuel Performance, 2, p.775 - 785, 2000/00

no abstracts in English

Journal Articles

Radiation damage in UO$$_{2}$$ bombarded with iodine and nickel ions at energies around 100 MeV

Hayashi, Kimio; ; Fukuda, Kosaku

Advances in Science and Technology, 24, p.439 - 446, 1999/00

no abstracts in English

Journal Articles

Study on reactivity feedback effects in the TRACY transient experiments

Nakajima, Ken; ;

Proceedings of 6th International Conference on Nuclear Criticality Safety (ICNC '99), 3, p.1286 - 1292, 1999/00

no abstracts in English

Journal Articles

Evaluation of delayed neutron data using FCA $$beta$$$$_{eff}$$ benchmark experiment

Okajima, Shigeaki; Zuhair*; Sakurai, Takeshi; H.Song*

Journal of Nuclear Science and Technology, 35(12), p.963 - 965, 1998/12

 Times Cited Count:2 Percentile:74.48(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Benchmark experiment on void effects in a bulk shield assembly and investigation on the predictive ability of these effects by transport calculations

Maekawa, Fujio; Konno, Chikara; Oyama, Yukio; Uno, Yoshitomo; Maekawa, Hiroshi; Ikeda, Yujiro

Fusion Engineering and Design, 42, p.275 - 280, 1998/00

 Times Cited Count:0 Percentile:100(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Radiation damage of UO$$_{2}$$ by high-energy heavy ions

; ; Fukuda, Kosaku

Journal of Nuclear Materials, 248, p.191 - 195, 1997/00

 Times Cited Count:16 Percentile:22.43(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Temperature effect on critical mass and kinetic parameter $$beta$$$$_{eff}$$/$$wedge$$ of VHTRC-4 core

Yamane, Tsuyoshi; Akino, Fujiyoshi;

PHYSOR 96: Int. Conf. on the Physics of Reactors, 2, p.E290 - E299, 1996/00

no abstracts in English

Journal Articles

Doppler effect measurement up to 2,000$$^{circ}$$C in the fast critical facility FCA

Okajima, Shigeaki; Oigawa, Hiroyuki; Ando, Masaki; Mukaiyama, Takehiko

Proc. of 9th Int. Symp. on Reactor Dosimetry, 0, p.172 - 179, 1996/00

no abstracts in English

JAEA Reports

Pre-analyses of SS316 and SS316/Water bulk shielding experiments

Konno, Chikara; Maekawa, Fujio; *; Kosako, Kazuaki*; Ikeda, Yujiro; Oyama, Yukio; Maekawa, Hiroshi

JAERI-Tech 94-019, 43 Pages, 1994/10

JAERI-Tech-94-019.pdf:1.64MB

no abstracts in English

Journal Articles

Radiation damage of UO$$_{2}$$ implanted with 100 MeV iodine ions

; ; Fukuda, Kosaku

Journal of Alloys and Compounds, 213-214, p.351 - 353, 1994/00

 Times Cited Count:5 Percentile:51.47(Chemistry, Physical)

no abstracts in English

Journal Articles

Numerical and experimental study on heat transfer of an impinging turbulent plane jet with confined wall

Kunugi, Tomoaki; *; *

Heat Transfer in Turbulent Flows, 1993; HTD-Vol. 246, p.25 - 31, 1993/00

no abstracts in English

Journal Articles

Measurement of Doppler effect up to 2000$$^{circ}$$C at FCA

Okajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko; *; Kasahara, Y.*; *

Transactions of the American Nuclear Society, 66, p.523 - 524, 1992/11

no abstracts in English

Journal Articles

Evaluation of delayed neutron data for thermal fission of U-235 based on integral experiments at semi-homogeneous experiment

; Akino, Fujiyoshi;

Journal of Nuclear Science and Technology, 25(9), p.673 - 681, 1988/09

 Times Cited Count:8 Percentile:34.07(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Radiation streaming analysis through narrow gaps in Fusion Experimental Reactor(FER)

*;

Journal of Nuclear Science and Technology, 24(1), p.1 - 11, 1987/01

 Times Cited Count:5 Percentile:48.4(Nuclear Science & Technology)

no abstracts in English

Journal Articles

A Small spherical NE213 scintillation detector for use in N-assembly fast neutron spectrum measurement

; ; ; ;

Nuclear Instruments and Methods in Physics Research A, 256, p.333 - 338, 1987/00

 Times Cited Count:21 Percentile:11.85(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Fine structure of Wigner energy release spectrum in neutron-irradiated graphite

Journal of Nuclear Materials, 133-134, p.361 - 364, 1985/00

 Times Cited Count:47 Percentile:2.91(Materials Science, Multidisciplinary)

no abstracts in English

26 (Records 1-20 displayed on this page)