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U doppler effect in the soft neutron spectra using FCA (Joint research)Ando, Masaki; Kawasaki, Kenji*; Okajima, Shigeaki; Fukushima, Masahiro; Matsuura, Yutaka*; Kaneko, Yuji*
JAERI-Research 2005-026, 39 Pages, 2005/09
JAERI-Research-2005-026.pdf:4.37MB
U Doppler effect measurements in moderated neutron spectra (uranium fuel and MOX simulated fuel) were carried out using FCA for the purpose of contributing to the improvement in prediction accuracy for Doppler coefficient in LWR. In the mockup cores for MOX fuel, the measurements were performed in different neutron spectra, where the voidage of moderator material was varied systematically. The experimental data were obtained using cylindrical uranium samples with different outer diameter up to 800
C. Analyses were performed using a standard code system designed to analyze fast reactor mock-up experiments at FCA with the use of the JENDL-3.2 library. The results of the analyses showed that the calculation accuracy did not depend on the types of the core fuel or the Doppler samples. The calculated values agreed with the experimental ones within the experimental error. Any dependency of the prediction accuracy on the neutron spectra was not observed in the MOX simulated fuel cores.
Ando, Masaki; Nakano, Yoshihiro; Okajima, Shigeaki; Kawasaki, Kenji
JAERI-Research 2003-029, 72 Pages, 2003/12
JAERI-Research-2003-029.pdf:3.41MB
The objectives of this study is to clarify calculation accuracy for the Doppler effect of the resonance materials; erbium (Er), tungsten (W) and thorium (ThO
). Doppler effect measurements were carried out in a fast neutron spectrum (XX-2 core) and in an intermediate neutron spectrum (XXI-1D2 core) by the sample-heated and reactivity worth measurement method up to 800C using FCA. The experiment was analyzed with the standard analysis method for fast reactor cores at FCA with the use of the JENDL-3.2. The SRAC system was also used to investigate the calculation accuracy of the system and to compare it with that of the FCA standard analysis method. The standard analysis method underestimated for the XX-2 core and agreed the experiments within the experimental errors for the XXI-1D2 core. The analysis with the SRAC system gave smaller values by 3%
10% for the Er sample and bigger values by 2%5% for the W sample than the standard analysis method.
Ando, Masaki; Nakano, Yoshihiro; Okajima, Shigeaki; Kawasaki, Kenji
Journal of Nuclear Materials, 319, p.126 - 130, 2003/06
Times Cited Count：0 Percentile：0.01(Materials Science, Multidisciplinary)Doppler effect experiments on resonance materials for ROX fuels were carried out to examine the calculation accuracy in the intermediate neutron spectrum using Fast Critical Assembly (FCA) at Japan Atomic Energy Research Institute. This study is the second phase of a series of the Doppler effect experiments on the resonance materials, which is following the measurements in the fast neutron spectrum. The Doppler effect was measured as the sample reactivity change between the heated and unheated samples. The cylindrical samples of the resonance materials such as erbium (Er), tungsten (W) and thorium (ThO) were used. The sample was heated up to 800C at the center of the FCA core. The Doppler effect measurements were analyzed using the SRAC 95 code system with the use of JENDL 3.2. The calculated values agreed with the experiment within the experimental error for the W and ThO samples, while the calculation overestimated the experiment for the Er sample about 10 %.
Ueshima, Yutaka
Dai-8-Kai Bijuarizeshon, Kanfarensu Rombunshu (CD-ROM), 12 Pages, 2002/10
The theory of special relativity found by Einstein is famous. It is one of the most important theories for our research on interactions between ultra-intense lasers and matters. The Name of the theory is well-known, although the understanding of that world is quite difficult. Therefore, we developed software to experience the special relativistic world with OPENGL Scene Graph. The software has not only normal display mode but also a projection mode of a simple virtual reality apparatus using polarizing filters. With the software, the relativistic distortion of a visual field and the Doppler effect near light speed can be expressed. It is difficult for a teacher to teach these relativistic effects with graphs and formulae. This software and simple virtual reality apparatus have already been used in the Ishikawa-e-Science2002, JAERI-Kyoto-Science Camp2002 and a lot of visitor tours in JAERI(Kizu). A lot of people were interested in these relativistic effects after the demonstration.
U Doppler Effect using various samples in FCA XVII-1Ando, Masaki; Okajima, Shigeaki; Oigawa, Hiroyuki
JAERI-Research 2001-017, 20 Pages, 2001/03
JAERI-Research-2001-017.pdf:0.82MB
U Doppler effect measurements were carried out using 6 uranium samples with various composition or diameter varying self-shielding factors of U. Calculation accuracy of the standard analysis method for fast reactor cores at FCA was investigated.The Doppler effect were measured by the sample-heated and reactivity worth measurement method up to 800 degree in the FCA XVII-1 assembly, which simulated Na-cooled MOX fueled FBR. In the analysis, the Doppler effect was calculated using the effective cross sections obtained by the PEACO-X code. The calculated values based on the diffusion theory agreed well with the experiment for the U-metal and UO samples. The calculation underestimated the experiment from 10% to 30% for the UO samples containing BeO. This underestimation was improved by the use of the transport calculation. The calculation, however, underestimated about 20% for the sample whose background cross section is greater than 300 barns.
R.P.Rulko*; Takano, Hideki; C.Broeders*; Wakabayashi, Toshio*; Sasa, Toshinobu; *; D.Lutz*; Mukaiyama, Takehiko; C.Nordborg*
Proc. of Int. Conf. on the Phys. of Nucl. Sci. and Technol., 2, p.1462 - 1469, 1998/00
no abstracts in English
C at FCA, 4; Investigation on calculation model for the Doppler effect measurement with a heated foil using MVP codeAndo, Masaki; Okajima, Shigeaki
JAERI-Research 97-014, 22 Pages, 1997/03
JAERI-Research-97-014.pdf:0.77MB
no abstracts in English
U at FCA, II; Reaction rate measurement up to 2000C with a foil heated by laser exposureOkajima, Shigeaki; Oigawa, Hiroyuki; Ando, Masaki; Mukaiyama, Takehiko
Journal of Nuclear Science and Technology, 34(1), p.13 - 20, 1997/01
Times Cited Count：2 Percentile：23.05(Nuclear Science & Technology)no abstracts in English
U at FCA, I; Reactivity worth measurement with a small heated sample up to 1500COkajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko; Ando, Masaki
Journal of Nuclear Science and Technology, 33(3), p.202 - 210, 1996/03
Times Cited Count：3 Percentile：32.72(Nuclear Science & Technology)no abstracts in English
C in the fast critical facility FCAOkajima, 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
Okajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko
Journal of Nuclear Science and Technology, 31(10), p.1097 - 1104, 1994/10
Times Cited Count：7 Percentile：56.56(Nuclear Science & Technology)no abstracts in English
C at FCA, 3; Development of a cell code, PEACO-X, with ultra-fine group structureOkajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko
JAERI-M 92-185, 42 Pages, 1992/11
no abstracts in English
C at FCAOkajima, Shigeaki; Oigawa, Hiroyuki; Mukaiyama, Takehiko; *; Kasahara, Y.*; *
Transactions of the American Nuclear Society, 66, p.523 - 524, 1992/11
no abstracts in English
; Akino, Fujiyoshi; ;
Journal of Nuclear Science and Technology, 24(6), p.431 - 441, 1987/06
Times Cited Count：2 Percentile：29.78(Nuclear Science & Technology)no abstracts in English
;
JAERI-M 85-218, 20 Pages, 1986/01
no abstracts in English
doppler effect measured in FCA;
Journal of Nuclear Science and Technology, 22(3), p.243 - 246, 1985/00
Times Cited Count：10 Percentile：83.39(Nuclear Science & Technology)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：93.7(Nuclear Science & Technology)no abstracts in English
; ; *
JAERI-M 8311, 58 Pages, 1979/07
no abstracts in English
