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Li, C.-Y.; Watanabe, Akira*; Uchibori, Akihiro; Okano, Yasushi
Proceedings of 30th International Conference on Nuclear Engineering (ICONE30) (Internet), 10 Pages, 2023/05
Sugino, Kazuteru; Takino, Kazuo
JAEA-Data/Code 2019-011, 110 Pages, 2020/01
JAEA-Data-Code-2019-011.pdf:3.37MB
A deterministic discrete ordinates method (SN method) transport calculation code for three-dimensional hexagonal geometry has been developed as the MINISTRI code (Ver. 7.0). MINISTRI is based on the triangle-mesh finite difference method, which can perform neutron transport calculations with high accuracy for cores of fast power reactors and assemblies of the Russian BFS critical facility. The present study has derived a proper scheme for remarkably improving the convergence of MINISTRI by investigating the issue of previous MINISTRI (Ver. 1.1), which sometimes plays a poor convergence performance in calculations for large-scale power reactor cores. The verification test of improved MINISTRI has been carried out for various cores by setting the reference result as the multi-group Monte-Carlo calculation with the same cross-sections as used in MINISTRI. As a result, it is found that the agreements are within 0.1% for eigenvalues and within 0.7% for power distributions. Thus, the satisfying accuracy of MINISTRI has been confirmed. In order to reduce the calculation time, the initial diffusion calculation scheme and the parallel processing have been implemented. As a result, the calculation time is reduced to the approximately one tenth compared with previous MINISTRI. Furthermore, adoption of the treatment of the anisotropic cell streaming effect, preparation of the perturbation calculation tool, implementation of the function for specification of the triangle-mesh-wise material and merging of the hexagonal-mesh calculation code MINIHEX have been carried out. Thus, the versatility of MINISTRI has been enhanced.
Fukushima, Masahiro; Kitamura, Yasunori; Kugo, Teruhiko; Okajima, Shigeaki
Journal of Nuclear Science and Technology, 53(3), p.406 - 424, 2016/03
Times Cited Count：10 Percentile：68.36(Nuclear Science & Technology)Yanagisawa, Kazuaki; Takahashi, Shoji*
Scientometrics, 78(3), p.505 - 524, 2008/10
Times Cited Count：1 Percentile：24.99(Computer Science, Interdisciplinary Applications)A socio-economic evaluation of Material Science (MS) of JAERI was made. The goal was to reveal the emphasized basic research fields (EBRF) of MS and to observe its socio-economic networking. High ranked keywords for the former and the number of co-authored papers for the latter were used along with many MS related papers. The obtained results are: (1) The EBRF of MS of JAERI were typically represented by the keywords of ion irradiation, actinides, etc., i.e., those having a strong relation to the nuclear field. Regarding actinides, the socio-economic networking between JAERI and PS occurred at the growth rate of 3-4% per 25 years, but 8% during the past 5 years. This implies that the research cooperation between the two was markedly enhanced. (2) The EBRF of MS between JAERI and 5 selected research bodies (SRB) represented by Tokyo University was directly compared and revealed that only 7 keywords as typically represented by neutron and accelerators. After overlapping, JAERI and SRB seem to be raising the national standard level.
Yanagisawa, Kazuaki; Takahashi, Shoji; Narita, Osamu; Yonezawa, Minoru
IAEA-CN-123/03/P/18 (CD-ROM), 9 Pages, 2004/10
To understand a socio-economic effect of basic research in JAERI, the stimulation and promotion of social interrelations through a formation of networking was studied quantitatively. (1)Worldwide trend of MS was studied by INIS by means of top {100} keywords as input. Research activity of MS in JAERI represented by top {100} keywords is not much different from that of other nuclear advanced countries participated to INIS. (2)Emphasized basic research fields (EBRF) of MS in JAERI can be clarified by selected keywords of "ion irradiation" and "actinides", those have a strong relation to nuclear. For actinides, the growth rate of networking between JAERI and PS was of order of 3-4% per 25 years and 8% per recent 5 years. The rate of networking formation is markedly increased recently. (3)Between JAERI and the other 5 selected research bodies, only 7 out of over 110 keywords such as "neutron" and "accelerators" were overlapped. In the overlapped region the two compensated and uplifted the national standard level each other.
The Ad Hoc Committee for Evaluation of R&D Achievements
JAERI-Review 2003-036, 75 Pages, 2003/11
JAERI-Review-2003-036.pdf:9.68MB
no abstracts in English
Abe, Shinya*; Nakata, Yutaka; Iitsuka, Tomoaki; Yamagishi, Kojiro*
JAERI-Tech 2003-077, 233 Pages, 2003/10
JAERI-Tech-2003-077.pdf:15.07MB
Japanese government is carrying out the administrative reform aiming to promote decentralization of authority, to magnify the field of private sectors, etc. in order to correspond appropriately to matured economy, internationalized market, etc. As one of the reforms, Japanese government decided that JAERI and JNC would unite into an independent administrative agency. The aims of the independent administrative agency institution include realization of effective and transparent system and management. The aim of the present investigation is to be useful for the new agency to develop a major business control system, which manages financial affairs and accounts not only efficiently but also in correspondence with open information to the public and promoting research activities effectively.
Yonezawa, Minoru
Joho No Kagaku to Gijutsu, 51(9), p.455 - 460, 2001/09
The International Nuclear Information System (INIS) provides links to useful nuclear related information sources in Internet by the name of "INIS Web Services" and the Energy Technology Data Exchange (ETDE) also provides links to useful energy related information sources in Internet by the name of "Energy Information Sources". This paper outlines these two services.
Nakamura, Hiroshi; Ida, Mizuho*; Nakamura, Hiroo; Nakamura, Hideo; Ezato, Koichiro; Akiba, Masato
JAERI-Research 2000-068, 30 Pages, 2001/02
JAERI-Research-2000-068.pdf:3.88MB
no abstracts in English
H.Camus*; R.Little*; D.Acton*; A.Agueero*; D.Chambers*; L.Chamney*; J.L.Daroussin*; J.Droppo*; C.Ferry*; E.Gnanapragasam*; et al.
Journal of Environmental Radioactivity, 42, p.289 - 304, 1999/00
Times Cited Count：19 Percentile：42.31(Environmental Sciences)no abstracts in English
; ; Yonezawa, Minoru; Kajiro, Tadashi; Mineo, Yukinobu; Habara, Takako; ; ; Habara, Tadashi
Dai-31-Kai Joho Kagaku Gijutsu Kenkyu Shukai Happyo Rombunshu, 0, p.123 - 129, 1995/00
no abstracts in English
; Nakajima, Hidemitsu; Itabashi, Keizo
Dai-29-Kai Joho Kagaku Gijutsu Kenkyu Shukai Happyo Rombunshu, p.341 - 351, 1993/00
no abstracts in English
;
Genshiryoku Kogyo, 39(10), p.31 - 35, 1993/00
no abstracts in English
; ; Itabashi, Keizo
Joho No Kagaku to Gijutsu, 43(10), p.913 - 915, 1993/00
no abstracts in English
; Itabashi, Keizo; Nakajima, Hidemitsu
Proc. of the 4th Int. Symp. on Advanced Nuclear Energy Research (JAERI-CONF 1/JAERI-M 92-207), p.442 - 446, 1992/12
no abstracts in English
Joho Kagaku Gijutsu Kenkyu Shukai Happyo Rombunshu, 28, p.125 - 130, 1992/00
no abstracts in English
Joho No Kagaku to Gijutsu, 41(2), p.147 - 152, 1991/02
no abstracts in English
Itabashi, Keizo;
Joho No Kagaku to Gijutsu, 40(12), p.840 - 847, 1990/12
no abstracts in English
Joho No Kagaku to Gijutsu, 40(1), p.27 - 34, 1990/00
no abstracts in English
Itabashi, Keizo
Senmon Toshokan, 0(125), p.91 - 96, 1989/00
no abstracts in English
