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Journal Articles

On-line subcriticality measurement using a pulsed spallation neutron source

Iwamoto, Hiroki; Nishihara, Kenji; Yagi, Takahiro*; Pyeon, C.-H.*

Journal of Nuclear Science and Technology, 54(4), p.432 - 443, 2017/04

 Times Cited Count:14 Percentile:90.26(Nuclear Science & Technology)

Journal Articles

Neutronic performance of rectangular and cylindrical coupled hydrogen moderators in wide-angle beam extraction of low-energy neutrons

Kai, Tetsuya; Harada, Masahide; Teshigawara, Makoto; Watanabe, Noboru; Kiyanagi, Yoshiaki*; Ikeda, Yujiro

Nuclear Instruments and Methods in Physics Research A, 550(1-2), p.329 - 342, 2005/09

 Times Cited Count:16 Percentile:74.09(Instruments & Instrumentation)

Neutronic study was performed on coupled hydrogen moderators to maximize time-integrated and pulse-peak intensities of slow neutrons when a large number of beams was required. The total increased with the number of beams, although the average decreased due to a reflector-missing by the beam extraction holes in the reflector. At a large beam extraction angle (25 degree), the spatial distribution of the vector-flux of neutrons was undesirable for a rectangular shape moderator. As an alternative we proposed a cylindrical shape one, resulting in a much improved spatial distribution. In addition, neutronic performance was calculated as a function of the diameter, indicating the optimal diameter was about 140 mm. The cylindrical one gave higher pulse-peak intensities with narrower pulse widths without penalty in time-integrated intensities and pulse decay characteristics, providing a more uniform angle-dependence. Some explanations are given for the difference in the pulse characteristics between the two. We decided to adopt the cylindrical one for the Japanese spallation neutron source.

Journal Articles

The Equivalent fundamental-mode source

G.D.Spriggs*; R.D.Busch*; Sakurai, Takeshi; Okajima, Shigeaki

Annals of Nuclear Energy, 26(3), p.237 - 264, 1999/00

 Times Cited Count:10 Percentile:62(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Calculation of neutron field generated at thick Li target bombarded with 10-40 MeV deuterons for energy selective neutron irradiation test facility

Oyama, Yukio; Yamaguchi, Seiya*; Kosako, Kazuaki*; Maekawa, Hiroshi

JAERI-M 92-191, 46 Pages, 1992/12

JAERI-M-92-191.pdf:1.12MB

no abstracts in English

Journal Articles

Monte carlo colculation of source characteristics of FNS water cooled type tritium target

; ; ; ; ; ; *

Journal of Nuclear Science and Technology, 20(8), p.686 - 697, 1983/00

 Times Cited Count:5 Percentile:57.51(Nuclear Science & Technology)

no abstracts in English

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