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Seki, Akiyuki; Yoshikawa, Masanori; Nishinomiya, Ryota*; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
Nuclear Technology, 12 Pages, 2024/00
Times Cited Count：0 Percentile：0.18(Nuclear Science & Technology)Two types of deep neural network (DNN) systems have been constructed with the intent to assist safety operation of a nuclear power plant. One is a surrogate system (SS) that can estimate physical quantities of a nuclear power plant in a computational time of several orders less than a physical simulation model. The other is an abnormal situation identification system (ASIS) that can estimate the state of the disturbance causing an anomaly from physical quantities of a nuclear power plant. Both systems are trained and tested using data obtained from the analytical code for incore and plant dynamics (ACCORD), which reproduces the steady and dynamic behavior of the actual high Temperature engineering test reactor (HTTR) under various scenarios. The DNN models are built by adjusting, the main hyperparameters. Through these procedures, these systems are shown able to perform with a high degree of accuracy.
Matsui, Yoshinori; Takahashi, Hiroyuki; Yamamoto, Masaya; Nakata, Masahito; Yoshitake, Tsunemitsu; Abe, Kazuyuki; Yoshikawa, Katsunori; Iwamatsu, Shigemi; Ishikawa, Kazuyoshi; Kikuchi, Taiji; et al.
JAEA-Technology 2009-072, 144 Pages, 2010/03
JAEA-Technology-2009-072.pdf:45.01MB
"R&D Project on Irradiation Damage Management Technology for Structural Materials of Long-life Nuclear Plant" was carried out from FY2006 in a fund of a trust enterprise of the Ministry of Education, Culture, Sports, Science and Technology. The coupled irradiations or single irradiation by JOYO fast reactor and JRR-3 thermal reactor were performed for about two years. The irradiation specimens are very important materials to establish of "Evaluation of Irradiation Damage Indicator" in this research. For the acquisition of the examination specimens irradiated by the JOYO and JRR-3, we summarized about the overall plan, the work process and the results for the study to utilize these reactors and some facilities of hot laboratory (WASTEF, JMTR-HL, MMF and FMF) of the Oarai Research-and-Development Center and the Nuclear Science Research Institute in the Japan Atomic Energy Agency.
Kitsunezaki, Akio; Yoshikawa, Shoichi*
Shin, Kaku Yugo Eno Chosen, 244 Pages, 2003/03
This book explains the recent progress of fusion research mainly on those of tokamaks, and contribute to the public information on fusion R&D. Researches on herical devices and inertial fusion are also briefly described. Consisits of 20 chapters: What is high temperature plasma ? / Current hole / Fusion power generaation / plasma and magnetic field / plasma confinement / particle and heat flow by copllision / heat flow by plasma fluctuation / heat flow by radiation / plasma heating / drive plasma current / plasma diagnostics / plasma and vacuum vessel / heat insulating layer / stellalater / inertial confinement / to fusion reactor / international cooperation / safety of fusion / special use of fusion reactor / future prospects / The contents are consistent with directions and discuusions in committees.
-implanted 6H-SiC studied by monoenergetic positron beamsUedono, Akira*; Tanigawa, Shoichiro*; Oshima, Takeshi; Ito, Hisayoshi; Yoshikawa, Masahito; Nashiyama, Isamu; Frank, T.*; Pensl, G.*; Suzuki, Ryoichi*; Odaira, Toshiyuki*; et al.
Journal of Applied Physics, 87(9), p.4119 - 4125, 2000/05
Times Cited Count：12 Percentile：49.32(Physics, Applied)no abstracts in English
Oshima, Takeshi; Uedono, Akira*; Ito, Hisayoshi; Yoshikawa, Masahito; Kojima, Kazutoshi; Okada, Sohei; Nashiyama, Isamu; Abe, Koji*; Tanigawa, Shoichiro*; Frank, T.*; et al.
Materials Science Forum, 338-342, p.857 - 860, 2000/00
no abstracts in English
Oshima, Takeshi; Ito, Hisayoshi; Uedono, Akira*; Suzuki, Ryoichi*; Ishida, Yuki*; Takahashi, Tetsuo*; Yoshikawa, Masahito; Kojima, Kazutoshi; Odaira, Toshiyuki*; Nashiyama, Isamu; et al.
Denshi Gijutsu Sogo Kenkyujo Iho, 62(10-11), p.469 - 476, 1999/00
no abstracts in English
Ito, Hisayoshi; Kawasuso, Atsuo; Oshima, Takeshi; Yoshikawa, Masahito; Nashiyama, Isamu; Okada, Sohei; Tanigawa, Shoichiro*; Okumura, Hajime*; Yoshida, Sadafumi*
Denshi Gijutsu Sogo Kenkyujo Iho, 62(10-11), p.23 - 29, 1999/00
no abstracts in English
-implanted 6H-SiC studied by monoenergetic positron beamsUedono, Akira*; Tanigawa, Shoichiro*; Oshima, Takeshi; Ito, Hisayoshi; Aoki, Yasushi; Yoshikawa, Masahito; Nashiyama, Isamu
Journal of Applied Physics, 86(10), p.5392 - 5398, 1999/00
Times Cited Count：10 Percentile：46(Physics, Applied)no abstracts in English
-implanted 6H-SiC using monoenergetic positron beamsUedono, Akira*; Oshima, Takeshi; Ito, Hisayoshi; Suzuki, Ryoichi*; *; Tanigawa, Shoichiro*; Aoki, Yasushi; Yoshikawa, Masahito; Nashiyama, Isamu; Mikado, Tomohisa*
Japanese Journal of Applied Physics, Part 1, 37(5A), p.2422 - 2429, 1998/05
Times Cited Count：13 Percentile：53.6(Physics, Applied)no abstracts in English
Oshima, Takeshi; Uedono, Akira*; Abe, Koji*; Ito, Hisayoshi; Aoki, Yasushi; Yoshikawa, Masahito; Tanigawa, Shoichiro*; Nashiyama, Isamu
Applied Physics A, 67(4), p.407 - 412, 1998/00
Times Cited Count：26 Percentile：72.57(Materials Science, Multidisciplinary)no abstracts in English
Oshima, Takeshi; Uedono, Akira*; Ito, Hisayoshi; Abe, Koji*; Suzuki, Ryoichi*; *; Aoki, Yasushi; Tanigawa, Shoichiro*; Yoshikawa, Masahito; Mikado, Tomohisa*; et al.
Mater. Sci. Forum, 264-268, p.745 - 748, 1998/00
no abstracts in English
Ito, Hisayoshi; Oshima, Takeshi; Aoki, Yasushi; Abe, Koji*; Yoshikawa, Masahito; Nashiyama, Isamu; Okumura, Hajime*; Yoshida, Sadafumi*; Uedono, Akira*; Tanigawa, Shoichiro*
Journal of Applied Physics, 82(11), p.5339 - 5347, 1997/12
Times Cited Count：13 Percentile：57.46(Physics, Applied)no abstracts in English
Uedono, Akira*; Ito, Hisayoshi; Oshima, Takeshi; Suzuki, Ryoichi*; *; Tanigawa, Shoichiro*; Aoki, Yasushi; Yoshikawa, Masahito; Nashiyama, Isamu; Mikado, Tomohisa*; et al.
Japanese Journal of Applied Physics, Part 1, 36(11), p.6650 - 6660, 1997/11
Times Cited Count：16 Percentile：63.3(Physics, Applied)no abstracts in English
Ito, Hisayoshi; Uedono, Akira*; Oshima, Takeshi; Aoki, Yasushi; Yoshikawa, Masahito; Nashiyama, Isamu; Tanigawa, Shoichiro*; Okumura, Hajime*; Yoshida, Sadafumi*
Applied Physics A, 65(3), p.315 - 323, 1997/00
Times Cited Count：16 Percentile：63.3(Materials Science, Multidisciplinary)no abstracts in English
Ito, Hisayoshi; Kawasuso, Atsuo; Oshima, Takeshi; Yoshikawa, Masahito; Nashiyama, Isamu; Tanigawa, Shoichiro*; *; Okumura, Hajime*; Yoshida, Sadafumi*
Physica Status Solidi (A), 162, p.173 - 198, 1997/00
Times Cited Count：132 Percentile：97.83(Materials Science, Multidisciplinary)no abstracts in English
Yoshikawa, Masanori; Seki, Akiyuki; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
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Seki, Akiyuki; Yoshikawa, Masanori; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
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Yoshikawa, Masanori; Seki, Akiyuki; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
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Yoshikawa, Masanori; Seki, Akiyuki; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
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Seki, Akiyuki; Yoshikawa, Masanori; Okita, Shoichiro; Takaya, Shigeru; Yan, X.
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