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Fujimoto, Nozomu; Yamashita, Kiyonobu*; Nojiri, Naoki; Takeuchi, Mitsuo; Fujisaki, Shingo; Nakano, Masaaki*
Nuclear Science and Engineering, 150(3), p.310 - 321, 2005/07
Times Cited Count：6 Percentile：40.41(Nuclear Science & Technology)Annular cores were formed in startup-core-physics tests of the High Temperature Engineering Test Reactor (HTTR) to obtain experimental data for verification of calculation codes. The first criticality, control rod positions at critical conditions, neutron flux distribution, excess reactivity etc. were measured as representative data. These data were evaluated with Monte Carlo code MVP that can consider the heterogeneity of coated fuel particles (CFP) distributed randomly in fuel compacts directly. It was made clear that the heterogeneity effect of CFP on reactivity for annular cores is smaller than that for fully-loaded cores. Measured and calculated effective multiplication factors (k) were agreed with differences less than 1%
k. Measured neutron flux distributions agreed with calculated results. The revising method was applied for evaluation of excess reactivity to exclude negative shadowing effect of control rods. The revised and calculated excess reactivity agreed with differences less than 1%k/k.
Fujimoto, Nozomu; Nakano, Masaaki*; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu
Nihon Genshiryoku Gakkai-Shi, 42(5), p.458 - 464, 2000/05
Times Cited Count：6 Percentile：42.55(Nuclear Science & Technology)no abstracts in English
Yamashita, Kiyonobu; Fujimoto, Nozomu; Takeuchi, Mitsuo; Fujisaki, Shingo; Nakano, Masaaki*; Umeta, Masayuki; Takeda, Takeshi; Mogi, Haruyoshi; Tanaka, Toshiyuki
Nihon Genshiryoku Gakkai-Shi, 42(1), p.30 - 42, 2000/01
Times Cited Count：3 Percentile：26.4(Nuclear Science & Technology)no abstracts in English
Fujimoto, Nozomu; Nakano, Masaaki*; Nojiri, Naoki; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu
JAERI-Conf 99-006, p.328 - 333, 1999/08
no abstracts in English
Yamashita, Kiyonobu; Takeuchi, Mitsuo; Fujimoto, Nozomu; Fujisaki, Shingo; Nakano, Masaaki*; Nojiri, Naoki; Tamura, Seiji*
Nihon Genshiryoku Gakkai-Shi, 41(1), p.35 - 38, 1999/00
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
Fujimoto, Nozomu; Takeuchi, Mitsuo; Fujisaki, Shingo; Nakano, Masaaki*; Yamashita, Kiyonobu; Mogi, Haruyoshi
UTNL-R-0378, p.5.1 - 5.10, 1999/00
no abstracts in English
Nojiri, Naoki; Nakano, Masaaki; Ando, Hiroei; Fujimoto, Nozomu; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu
JAERI-Tech 98-032, 59 Pages, 1998/08
no abstracts in English
Fujimoto, Nozomu; Nojiri, Naoki; Nakano, Masaaki*; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu
JAERI-Tech 98-021, 66 Pages, 1998/06
no abstracts in English
Nakano, Masaaki; Yamashita, Kiyonobu; Fujimoto, Nozomu; Nojiri, Naoki; Takeuchi, Mitsuo; Fujisaki, Shingo; *; Nakata, Tetsuo*
JAERI-Tech 98-017, 61 Pages, 1998/05
no abstracts in English
Yamashita, Kiyonobu; Nojiri, Naoki; Fujimoto, Nozomu; Nakano, Masaaki*; Ando, Hiroei; Nagao, Yoshiharu; Nagaya, Yasunobu; Akino, Fujiyoshi; Takeuchi, Mitsuo; Fujisaki, Shingo; et al.
Proc. of IAEA TCM on High Temperature Gas Cooled Reactor Applications and Future Prospects, p.185 - 197, 1998/00
no abstracts in English
Kaneko, Yoshihiko*; Shimakawa, Satoshi; Nagao, Yoshiharu; Yamashita, Kiyonobu; ; Yamane, Tsuyoshi
JAERI-Research 97-003, 70 Pages, 1997/02
JAERI-Research-97-003.pdf:1.79MB
no abstracts in English
Morimoto, Makoto*; *; *; *; Okude, T.*; *; *
PNC TN9410 88-028, 54 Pages, 1988/01
Operator supporting systems in JOYO have been developed for stable operation itself and credible operation of future FBR. JOYCAT which applies AI technique is one of these systems. The inference engine for diagnosis and the knowledge base of secondary cooling system were developed, and then the verification test of JOYCAT was conducted with coupling with JOYO operator training simulator in FY1986. By generating some malfunctions in the simulator, the function (decision of first hit alarm, choosing of first operation and sequence monitoring) of JOYCAT was tested in FY1987. Through the development works, knowledge and experience for means to construct the knowledge base, to verify function of this system and to improve the function for highly advanced system were obtained. Considering these experiences, the knowledge base will be expanded for other plant systems and the diagnosis will be further improved. After the verification test with the simulator will be carried out repeatedly to confirm credibility. This system will be equipped JOYO by 1990.
Onuki, Toshihiko; Kozai, Naofumi; Sakamoto, Fuminori; Yu, Q.; Yamashita, Mitsuo*; Horiike, Takumi*; Utsunomiya, Satoshi*
no journal, ,
We have studied the elimination of Sr from sea water into biogenic calcite. Biogenic calcite were produced at 30
by a maline microbe of TK2d. SEM and TEM analyses showed that needle shaped precipitates containing Ca and Sr was formed when 1.0 mM Sr was added in the solution with TK2d strain. XAFS analysis indicates that coordination environment of Sr in the biotic coprecipitates differs from that in the abiotic one.
