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Np, 
Am, and 
Am reaction rates in highly enriched uranium fuel cores at Kyoto University Critical AssemblyPyeon, C. H.*; Oizumi, Akito; Katano, Ryota; Fukushima, Masahiro
Nuclear Science and Engineering, 199(3), p.429 - 444, 2025/03
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)Experimental analyses of neptunium-237 (Np), americium-241 (Am), and Am fission and Np capture reaction rates are conducted by the Serpent 2 code together with ENDF/B-VIII.0 and JENDL-5, using experimental data at neutron spectra of thermal and intermediate regions obtained in the solid-moderated and solid-reflected cores with highly-enriched uranium fuel at the Kyoto University Critical Assembly. Also, uncertainty quantification of fission and capture reaction rate ratios of test samples of Np, Am and Am with reference samples of uranium-235 (
U) and gold-197 (
Au) are evaluated by the MARBLE code system. In terms of fission reaction rate ratios of Np/U, Am/U and Am/U, a comparison between experiments and Serpent 2 calculations shows an accuracy about 5, 15 and 10%, respectively, together with ENDF/B-VIII.0 and JENDL-5. For capture reaction rate ratios of Np/Au, Serpent 2 calculations reveal a fairly good accuracy at the thermal neutron spectrum. The total uncertainties of Np/U, Am/U and Am/U fission reaction rate ratios by MARBLE with the covariance data of ENDF/B-VIII.0 and JENDL-5 are found to be about 4% at most in all cores, except for about 8% of Am/U with ENDF/B-VIII.0 at the intermediate neutron spectrum.
Takino, Kazuo; Sugino, Kazuteru; Oki, Shigeo
Annals of Nuclear Energy, 162, p.108454_1 - 108454_7, 2021/11
Times Cited Count：1 Percentile：10.83(Nuclear Science & Technology)Np and Am through loess mediaTanaka, Tadao; Mukai, Masayuki; Maeda, Toshikatsu; Matsumoto, Junko; Ogawa, Hiromichi; Li, Z.*; Wang, X.*; Fan, Z.*; Guo, L.*; Liu, C.*
Journal of Radioanalytical and Nuclear Chemistry, 256(2), p.205 - 211, 2003/05
Times Cited Count：3 Percentile：25.38(Chemistry, Analytical)Migration experiments of Np(V) and Am(III) have been performed using a column system, to investigate migration behavior of Np and Am through a column packed with loess, taken from Shanxi, China. Adsorption mechanisms of Np and Am on the loess were examined by a chemical extraction method. In the case of the Np, most of Np adsorbed on the influent edge of the column. The Np adsorbed on the loess was mainly controlled by surface complexation. However, the migration of Np in the loess media could be roughly evaluated by using the distribution coefficient. In the case of the Am, particulate Am species was formed in the influent solution and moved in the column. The Am adsorbed on the loess was controlled by irreversible reactions. The migration behavior of particulate Am in the loess media could be expressed by the filtration theory.
Ando, Masaki; ; Nishina, Kojiro*;
Journal of Nuclear Science and Technology, 34(5), p.445 - 453, 1997/05
Times Cited Count：6 Percentile：47.47(Nuclear Science & Technology)no abstracts in English
Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Fujio; Maekawa, Hiroshi; ; ; Nakamura, Tomoo; M.A.Abdou*; Bennett, E. F.*; et al.
Fusion Technology, 28(1), p.56 - 73, 1995/08
no abstracts in English
U captures to U fission in low-enriched UO
tight latticesNakajima, Ken; ; Yamamoto, Toshihiro; ; Suzaki, Takenori
Journal of Nuclear Science and Technology, 31(11), p.1160 - 1170, 1994/11
Times Cited Count：7 Percentile：56.13(Nuclear Science & Technology)no abstracts in English
B.P.Kochurov*
JAERI-Review 94-002, 161 Pages, 1994/08
JAERI-Review-94-002.pdf:4.27MB
no abstracts in English
Oyama, Yukio; Kosako, Kazuaki*; Nakagawa, Masayuki; Nakamura, Tomoo
Fusion Engineering and Design, 18, p.281 - 286, 1991/00
Times Cited Count：5 Percentile：53.57(Nuclear Science & Technology)no abstracts in English
Yahata, Taneaki; ; Hirata, Masaru
JAERI-M 90-075, 68 Pages, 1990/05
no abstracts in English
Obu, Makoto; ; Sakurai, Takeshi; Iijima, Susumu; ; Osugi, Toshitaka
JAERI-M 90-052, 52 Pages, 1990/03
no abstracts in English
Sagara, Akio*; ; Sasaki, Teikichi; Baba, Yuji
Nuclear Instruments and Methods in Physics Research B, 44, p.373 - 376, 1990/00
Times Cited Count：4 Percentile：53.84(Instruments & Instrumentation)no abstracts in English
; ; Kikuchi, Yasuyuki
JAERI-M 84-027, 31 Pages, 1984/02
no abstracts in English
; ;
JAERI-M 9091, 50 Pages, 1980/10
no abstracts in English
; ;
JAERI-M 9090, 34 Pages, 1980/09
no abstracts in English
Kikuchi, Yasuyuki; Narita, Tsutomu;
Journal of Nuclear Science and Technology, 17(7), p.567 - 570, 1980/00
Times Cited Count：15 Percentile：93.41(Nuclear Science & Technology)no abstracts in English
; ; ;
JAERI-M 6601, 26 Pages, 1976/06
no abstracts in English
Journal of Nuclear Science and Technology, 13(2), p.58 - 73, 1976/02
Times Cited Count：2no abstracts in English
