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Endo, Shunsuke; Kawamura, Shiori*; Okudaira, Takuya*; Yoshikawa, Hiromoto*; Rovira Leveroni, G.; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Osamu; Iwamoto, Nobuyuki
European Physical Journal A, 59(12), p.288_1 - 288_12, 2023/12
Times Cited Count:0 Percentile:0.02(Physics, Nuclear)no abstracts in English
Ichihara, Akira
JAEA-Conf 2017-001, p.103 - 108, 2018/01
In the Nuclear Data Center of Japan Atomic Energy Agency (JAEA-NDC), we are engaged in the evaluation activity for the next version of the Japanese Evaluated Nuclear Data Library, JENDL-4.0. Zirconium is an important structural material in nuclear reactors, and zircaloys are being employed in fuel rods. Also, Zr is a long-lived fission product (LLFP) with a half-life of 1.6110 years. At present we are investigating resonance parameters of Zr isotopes using experimental data published after the evaluation of JENDL-4.0. Through this work, a negative resonance of Zr in JENDL-4.0 was removed to reproduce the J-PARC/MLF/ANRRI experiment. The resonance parameters for other natural Zr isotopes will be altered by adopting the data obtained at CERN n-TOF experiments.
Schillebeeckx, P.*; Becker, B.*; Harada, Hideo; Kopecky, S.*
Landolt-Brnstein Group 1, Vol.26; Numerical Data and Functional Relationships in Science and Technology, Subv.A; Neutron Resonance Parameters, p.4 - 52, 2015/00
The probability that neutrons interact with nuclei strongly depends on the energy of the incoming neutron. There are resonances at specific energies for each nuclide.Since resonances appear at energies that are specific for each nuclide, they can be used to determine the elemental and in some cases even the isotopic composition of materials and objects. The resonance structures in total and capture cross sections are the basis of Neutron Resonance Transmission Analysis (NRTA) and Neutron Resonance Capture Analysis (NRCA), respectively. Principles of NRTA and NRCA are reviewed. Neutron Resonance Densitometry (NRD) combining NRTA and NTCA is also reviewed as a non-destructive method to characterize particle-like debris of melted fuel.
Zukeran, Atsushi*; Nakagawa, Tsuneo; Shibata, Keiichi; Ishikawa, Makoto*; Hino, Tetsushi*
JAERI-Research 2004-026, 102 Pages, 2005/02
Reactivity uncertainties such as effective multiplication factor can be estimated by the sensitivity coefficients of the infinitely diluted cross section and resonance self-shielding factor to the changes of resonance parameters of interest. In the present work, the uncertainties of the resolved resonance parameters for the evaluated nuclear data file JENDL-3.2 were estimated on the basis of Breit-Wigner Multi-level formula. The resonance self-shielding factor based on NR-approximation is analytically described. Reactivity uncertainty evaluation method for the effective multiplication factor k, temperature coefficient , and Doppler reactivity worth is developed by means of the sensitivity coefficient against the resonance parameter. Final uncertainties are estimated by means of error propagation law using the level-wise uncertainties. Preliminary uncertainty of Doppler reactivity worth results about 4% at the temperature 728 K for large sodium-cooled FBR.
Nakagawa, Tsuneo; Hasegawa, Akira
JAERI-Research 2003-020, 46 Pages, 2003/09
The evaluated nuclear data for I and Nd stored in JENDL-3.3 were investigated comparing with other evaluated data and experimental data. New experimental data were available especially for the capture cross sections of both nuclides. The parameters used in theoretical calculations were modified so as to reproduce those experimental data. The statistical model calculation was performed using the revised parameters. The resonance parameters were also revised so that the cross sections measured in the thermal energy region were reproduced well. The present results were compiled in the ENDF-6 format.
Kawano, Toshihiko*; Shibata, Keiichi
Journal of Nuclear Science and Technology, 39(8), p.807 - 815, 2002/08
Times Cited Count:6 Percentile:39.48(Nuclear Science & Technology)A simple method to estimate covariances for resolved resonance parameters was developed. Although a large number of resolved resonances are observed for major actinides, uncertainties in averaged cross sections are more important than those in resonance parameters in reactor calculations. The method developed here is to derive a covariance matrix for the resolved resonance parameters which gives an appropriate uncertainty of the averaged cross sections. The method was adopted to evaluate the covariance data for , , and resonance parameters in JENDL-3.2,with the Reich-Moore R-matrix formula.
Shibata, Keiichi; *; Murata, Toru*
JAERI-Research 98-045, 48 Pages, 1998/08
no abstracts in English
Shibata, Keiichi; *; Kawano, Toshihiko*; S.Oh*; Matsunobu, Hiroyuki*; Murata, Toru*
JAERI-Research 97-074, 68 Pages, 1997/10
no abstracts in English
Nakagawa, Tsuneo
JAERI-Data/Code 97-015, 72 Pages, 1997/05
no abstracts in English
Kikuchi, Yasuyuki; *
JAERI-M 84-111, 97 Pages, 1984/06
no abstracts in English
JAERI-M 82-151, 37 Pages, 1982/10
no abstracts in English
Kikuchi, Yasuyuki
JAERI-M 82-096, 103 Pages, 1982/08
no abstracts in English
*; *; Kikuchi, Yasuyuki
Journal of Nuclear Science and Technology, 19(12), p.1037 - 1052, 1982/00
Times Cited Count:0 Percentile:0.02(Nuclear Science & Technology)no abstracts in English
Kikuchi, Yasuyuki; Nakagawa, Tsuneo; *; *; ; *
JAERI 1268, 142 Pages, 1981/02
no abstracts in English
; ;
Journal of Nuclear Science and Technology, 18(10), p.745 - 755, 1981/00
Times Cited Count:7 Percentile:66.93(Nuclear Science & Technology)no abstracts in English
; ;
Proc.Int.Conf.Nucl.Cross Section for Technol., p.173 - 176, 1980/00
no abstracts in English
;
Journal of Nuclear Science and Technology, 16(10), p.701 - 710, 1979/10
Times Cited Count:2no abstracts in English
Kikuchi, Yasuyuki
Journal of Nuclear Science and Technology, 14(7), p.467 - 481, 1977/07
Times Cited Count:0no abstracts in English
Fuketa, Toyojiro; ; ; Asami, Akira*
Second Conf.On Neutron Cross Section and Technology, II, p.789 - 794, 1968/05
no abstracts in English