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Tajima, Yasuhide; Ieda, Yoshiaki
Denki Hyoron, 99(2), p.46 - 61, 2014/02
no abstracts in English
Tajima, Yasuhide; Miura, Yukitoshi; Ieda, Yoshiaki
Denki Hyoron, 98(2), p.45 - 60, 2013/02
no abstracts in English
Ieda, Yoshiaki; Chikazawa, Yoshitaka; Kotake, Shoji*
ATW; International Journal for Nuclear Power, 57(3), p.163 - 168, 2012/03
Fast reactor development experiences and status in Japan are summarized. The undergoing FaCT project is pursuing commercialization of fast reactor cycle system around 2050 under cooperation of MEXT, METI, utilities, venders and JAEA. As results of the FaCT Phase I, feasibility of the key technologies for JSFR has been evaluated and the project is waiting for launching the phase II due to the Tohoku large earthquake. It is considered that the nuclear development policy might be affected by the Tohoku large Earthquake/Tsunami in Japan. Nevertheless the significance of nuclear energy will not be changed and thus we will focus on the issues learnt from Fukushima accidents and reflect into the improvement of the safety of Monju and the safety design criteria for the next generation fast reactor systems.
Ieda, Yoshiaki; Ono, Kiyoshi; Negishi, Hitoshi; Shiotani, Hiroki; Nagaoki, Yoshihiro; Namba, Takashi
Proceedings of International Conference on Toward and Over the Fukushima Daiichi Accident (GLOBAL 2011) (CD-ROM), 9 Pages, 2011/12
Since 1999, Japan Atomic Energy Agency (JAEA) has promoted R&D of the Fast Breeder Reactor Cycle in order to build the practical concepts and establish the technical systems, in cooperation with related entities. In the first 5-year of the Fast Reactor Cycle System Technology Development Project (FaCT), namely the FaCT phase1 (JFY2006-2010), the evaluation of the achievement degree to the performance target fixed by the Atomic Energy Commission and the adoption judgment of the innovative technology at present were carried out with "Sodium-cooled Fast Reactor with MOX fuel, advanced aqueous reprocessing process, and simplified MOX pellet fabrication process". FaCT phase1 moved forward almost smoothly and confirmed that the project will be able to enter the next phase to demonstrate the innovative technology by the engineering scale examination. The concrete results of the FaCT phase1 and future direction are introduced in the full paper.
Ieda, Yoshiaki; Chikazawa, Yoshitaka; Kotake, Shoji*
Proceedings of Jahrestagung Kerntechnik Annual Meeting on Nuclear Technology 2011 (DVD-ROM), 11 Pages, 2011/05
Even though international SFR circumstances were against, we kept on with our R&D steadily. As results, it has shown that commercialized SFR concept, Japan Sodium-cooled Fast Reactor (JSFR) could meet the targets. And Monju has restarted in May 2010. It is planned to be recovered for an incident on the in-vessel transfer machine aiming to 40% power operation. The undergoing FaCT project is pursuing commercialization of fast reactor cycle system around 2050 under cooperation of the government, utilities, venders and JAEA. In the FaCT Phase I, the key technologies for JSFR has been evaluated and the project is waiting for launching the phase II. Nevertheless the significance of nuclear energy will not be changed. We will focus on the issues learnt from the accidents on Fukushima Daiichi NPS and reflect its experiences into the safety design criteria for the next generation Fast Reactor systems.
Sakamoto, Yoshihiko; Sakamoto, Yoshihiko; Enuma, Yasuhiro; Ando, Masato; Nishikawa, Akira; Kotake, Shoji; Ieda, Yoshiaki
Dai-14-Kai Kantaiheiyo Genshiryoku Kaigi (2004-Nen 3-Gatsu 21-Nichi
25-Nichi), 0 Pages, 2003/00
This paper describes the summary of an interim report of phase II of the Feasibility Study on Commercialized FR Cycle Systems, related to reactor systems. Promising plant concepts (sodium-, lead-bismuth-, helium-, and water-cooled fast reactor) and reactor core concepts are presented. These concepts are quantitatively evaluated from the viewpoint of the suitability to the development targets, such as economic competitiveness, efficient utilization of resources and reduction of environmental burden, with securing safety. As results, sodium cooled fast reactor is well suited to the development targets. LBE cooled fast rector would have a potential to attain the development targets. Helium gas cooled fast reactor would have the great potential for high thermal efficiency and multipurpose energy system. And water cooled fast reactor has the advantage that there are many experiences with LWR. Furthermore the crucial issues for technical feasibility are also clarified as road map of key technology development for each concept.
Negishi, Hitoshi; Sagayama, Yutaka; Sato, Kazujiro; ; Nakai, Ryodai; Ieda, Yoshiaki
Saikuru Kiko Giho, (20), 0 Pages, 2003/00
None
Negishi, Hitoshi; ; ; ; Sato, Kazujiro; Ieda, Yoshiaki
Saikuru Kiko Giho, (16), p.1 - 12, 2002/09
None
; Ieda, Yoshiaki; Konomura, Mamoru; Shimakawa, Yoshio
Kantaiheiyo Genshiryoku Kaigi, 0 Pages, 2002/00
None
Tokuhiro, Akira; ; ; Ohshima, Hiroyuki;
Nuclear Engineering and Design, 177, p.91 - 104, 1998/00
Times Cited Count：2 Percentile：23.01(Nuclear Science & Technology)None
Kamide, Hideki; Ieda, Yoshiaki; Kobayashi, Jun; Ninokata, Hisashi
PNC TN9410 96-076, 72 Pages, 1996/03
A benchmark exercise for multi-dimensional thermohydralinc codes was carried out related to natural convection decay heat removal in liquid metal-cooled fast breeder reactors. A total of twelve computational methods were applied to the benchmark problem which simulated mixed forced and buoyancy driven penetration flow and thermal stratification phenomena. The applicability of turbulence models and higher order schemes of convection terms, was examined, and a combined method incorporating a higher order scheme and a turbulence model was found to be highly effective among the group of finite difference methods. The importance of turbulence models was also recognized for the finite element method. Development of a turbulence model applicable to the mixed convection flow regime was also discussed.
