Search Results - "Utoh, Hiroyasu"

Metallographic and Bending Strain Property Analysis of reinforced Nb3Sn strand candidates for Japanese DEMO by Banno, Nobuya, Yagai, Tsuyoshi, Kawashima, Shinya, Sugimoto, Masahiro, Awaji, Satoshi, Utoh, Hiroyasu, Sakamoto, Yoshiteru

“…The influence of a large electromagnetic force on the conductor of a demonstration power plant (DEMO) reactor magnet is a crucial issue. The present study…”
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Overview of the DEMO conceptual design activity in Japan by Tobita, Kenji, Hiwatari, Ryoji, Utoh, Hiroyasu, Miyoshi, Yuya, Asakura, Nobuyuki, Sakamoto, Yoshiteru, Someya, Youji, Homma, Yuki, Nakamura, Makoto, Hoshino, Kazuo, Tanigawa, Hiroyasu, Nakamichi, Masaru, Tokunaga, Shinsuke, Kudo, Hironobu, Nishimura, Arata

“…The requirements for Japanese DEMO are to demonstrate (1) steady and stable electrical power generation, (2) plant availability on a level relevant for…”
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Shutdown dose-rate assessment during the replacement of in-vessel components for a fusion DEMO reactor by Someya, Youji, Utoh, Hiroyasu, Hiwatari, Ryoji, Tanigawa, Hisashi, Tobita, Kenji

“…•Shutdown dose rate was analyzed to consider a maintenance progress for DEMO by using MCNP-5 and DCHAIN-SP2001.•The dose rate of pipe cutting and re-welding…”
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Technological assessment between vertical and horizontal remote maintenance schemes for DEMO reactor by Utoh, Hiroyasu, Hiwatari, Ryoji, Tobita, Kenji, Someya, Youji, Aoki, Akira, Sakamoto, Yoshiteru, Asakura, Nobuyuki

“…•Preliminary assessment for two options of remote maintenance is carried out to establish a feasible maintenance scheme on the DEMO design.•Analysis on the…”
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Safety research on fusion DEMO in Japan: Toward development of safety strategy of a water-cooled DEMO by Nakamura, Makoto, Tobita, Kenji, Someya, Youji, Utoh, Hiroyasu, Sakamoto, Yoshiteru, Gulden, Werner

“…•This paper reports the current status of a safety research on water-cooled fusion DEMO in Japan.•We report analyses of two transients: (i) complete loss of…”
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Simplification of blanket system for SlimCS fusion DEMO reactor by Someya, Youji, Takase, Haruhiko, Utoh, Hiroyasu, Tobita, Kenji, Liu, Changle, Asakura, Nobuyuki

“…Simplification of blanket system is necessary for a fusion DEMO reactor. Although the conceptual design of a tritium-breeding blanket for SlimCS has been…”
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Comparative evaluation of remote maintenance schemes for fusion DEMO reactor by Utoh, Hiroyasu, Tobita, Kenji, Someya, Youji, Asakura, Nobuyuki, Sakamoto, Yoshiteru, Hoshino, Kazuo, Nakamura, Makoto

“…•Various remote maintenance schemes for DEMO were comparatively assessed based on requirements for DEMO remote maintenance.•The banana shape segment transport…”
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Evaluation of remote maintenance schemes by plasma equilibrium analysis in Tokamak DEMO reactor by Utoh, Hiroyasu, Tobita, Kenji, Asakura, Nobuyuki, Sakamoto, Yoshiteru

“…•The remote maintenance schemes in DEMO reactor were evaluated by the plasma equilibrium analysis.•Horizontal sector transport maintenance scheme requires the…”
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Conceptual study of vertical sector transport maintenance for DEMO fusion reactor by Utoh, Hiroyasu, Tobita, Kenji, Someya, Youji, Takase, Haruhiko

“…The maintenance scheme is a critical issue for DEMO design, and requires high availability of the reactor. The SlimCS, designed in JAEA, adopts the horizontal…”
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Analysis of plasma position control for DEMO reactor by Takase, Haruhiko, Utoh, Hiroyasu, Sakamoto, Yoshiteru, Mori, Kazuo, Kudo, Tatsuya, Tobita, Kenji

“…•Plasma position control for DEMO reactor has been investigated using numerical code.•Stabilization effect of conductors and active feedback control are…”
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Design concept of conducting shell and in-vessel components suitable for plasma vertical stability and remote maintenance scheme in DEMO reactor by Utoh, Hiroyasu, Takase, Haruhiko, Sakamoto, Yoshiteru, Tobita, Kenji, Mori, Kazuo, Kudo, Tatsuya, Someya, Youji, Asakura, Nobuyuki, Hoshino, Kazuo, Nakamura, Makoto, Tokunaga, Shinsuke

“…•Conceptual design of in-vessel component including conducting shell has been investigated.•The conducting shell design for plasma vertical stability was…”
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Application of inter-linked superconducting coils for central solenoid and advanced divertor configuration of DEMO by Utoh, Hiroyasu, Asakura, Nobuyuki, Tobita, Kenji, Sakamoto, Yoshiteru, Someya, Youji, Hoshino, Kazuo, Nakamura, Makoto

“…•To determine the engineering feasibility of inter-linked superconducting CS and PF coil, we designed IL-CS and PF coil.•Use of the IL-PF coil enables to…”
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Waste management strategy focused on maintenance, storage and recycling by Someya, Youji, Tobita, Kenji, Utoh, Hiroyasu, Asakura, Nobuyuki

“…► Decay heat for each 1/12-sector is as high as 5MW just after the shutdown and 0.3MW one month later. ► For the maintenance, a CSS is proposed to remove the…”
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Characterization of Japan's DEMO Candidate Reinforced Nb3Sn Wires Under Crossover Contact Stress by Banno, Nobuya, Asano, Toshihisa, Yagai, Tsuyoshi, Kawashima, Shinya, Sugimoto, Masahiro, Awaji, Satoshi, Utoh, Hiroyasu, Sakamoto, Yoshiteru

“…The size of Japan's demonstration power plant (JA DEMO) reactor is planned to be approximately 1.4 times larger than that of ITER magnet. Mechanical behavior…”
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Characterization of Japan's DEMO Candidate Reinforced Nb 3 Sn Wires Under Crossover Contact Stress by Banno, Nobuya, Asano, Toshihisa, Yagai, Tsuyoshi, Kawashima, Shinya, Sugimoto, Masahiro, Awaji, Satoshi, Utoh, Hiroyasu, Sakamoto, Yoshiteru

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Advantages of Cu-Nb Reinforced Nb }Sn Strands in Large Multi-Stage Stranded Cables With Low-Void Fraction by Sugimoto, Masahiro, Hirose, Kiyoshige, Taniguchi, Ryo, Ebisawa, Koichi, Awaji, Satoshi, Oguro, Hidetoshi, Utoh, Hiroyasu, Sakamoto, Yoshiteru

“…A large multi-stage stranded cable structure with Nb<inline-formula><tex-math notation="LaTeX">_{\text{3}}</tex-math></inline-formula>Sn strands twisted at a…”
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Conceptual design of coolant circuits and thermal stress analysis for JA-DEMO divertor by Asakura, Nobuyuki, Kakudate, Satoshi, Chen, Weixi, Utoh, Hiroyasu, Someya, Youji, Sakamoto, Yoshiteru

“…•JA-DEMO divertor concept with double-coolant circuits of 200°C and 290°C pressurized waters was developed.•Plasma Facing Unit support design for the coolant…”
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Design study of superconducting coil system for JA DEMO by Utoh, Hiroyasu, Sakamoto, Yoshiteru, Miura, Hideaki, Arakawa, Hitoshi, Echizenya, Daisuke, Matsuda, Takuya, Hasegawa, Mitsuru, Nomoto, Kazuhiro

“…•The design study of options for cost rationalization and the R&D required for larger coil sizes on JA DEMO is being carried out.•Using "Hybrid R-shape"…”
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Conceptual design of poloidal horseshoe limiter layout for JA DEMO by Chen, Weixi, Someya, Youji, Kakudate, Satoshi, Asakura, Nobuyuki, Sugiyama, Shota, Umeda, Naotaka, Utoh, Hiroyasu, Sakamoto, Yoshiteru

“…•The design flow for the poloidal horseshoe limiter in JA DEMO is rearranged.•The poloidal horseshoe limiter layout was designed according to the flat-top…”
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Metallographic and Bending Strain Property Analysis of Reinforced Nb 3 Sn Strand Candidates for Japanese DEMO by Banno, Nobuya, Yagai, Tsuyoshi, Kawashima, Shinya, Sugimoto, Masahiro, Awaji, Satoshi, Utoh, Hiroyasu, Sakamoto, Yoshiteru

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