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Journal Articles

Uniaxial strain dependence of the critical current of DI-BSCCO tapes

Osamura, Kozo*; Machiya, Shutaro*; Hampshire, D. P.*; Tsuchiya, Yoshinori*; Shobu, Takahisa; Kajiwara, Kentaro*; Osabe, Goro*; Yamazaki, Kohei*; Yamada, Yuichi*; Fujikami, Jun*

Superconductor Science and Technology, 27(8), p.085005_1 - 085005_11, 2014/08

 Times Cited Count:25 Percentile:74.19(Physics, Applied)

Journal Articles

29th report of ITPA topical group meeting

Isayama, Akihiko; Sakakibara, Satoru*; Furukawa, Masaru*; Matsunaga, Go; Yamazaki, Kozo*; Watanabe, Kiyomasa*; Idomura, Yasuhiro; Sakamoto, Yoshiteru; Tanaka, Kenji*; Tamura, Naoki*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 86(6), p.374 - 377, 2010/06

no abstracts in English

Journal Articles

27th report of ITPA topical group meeting

Osakabe, Masaki*; Shinohara, Koji; Toi, Kazuo*; Todo, Yasushi*; Hamamatsu, Kiyotaka; Murakami, Sadayoshi*; Yamamoto, Satoshi*; Idomura, Yasuhiro; Sakamoto, Yoshiteru; Tanaka, Kenji*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 85(12), p.839 - 842, 2009/12

no abstracts in English

Journal Articles

Report on ITPA meetings, 24

Idomura, Yasuhiro; Yoshida, Maiko; Yagi, Masatoshi*; Tanaka, Kenji*; Hayashi, Nobuhiko; Sakamoto, Yoshiteru; Tamura, Naoki*; Oyama, Naoyuki; Urano, Hajime; Aiba, Nobuyuki; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 84(12), p.952 - 955, 2008/12

no abstracts in English

Journal Articles

Radioactive waste management in O-arai Research and Development Center

Maeda, Atsushi; Kowata, Koichi; Yamazaki, Yasuo; Takahashi, Kozo; Okubo, Toshiyuki; Miyazaki, Hitoshi

Dekomisshoningu Giho, (33), p.58 - 66, 2006/03

By the Japan Atomic Energy Agency (JAEA), designed decommissioning of nuclear facility and the treatment and disposal of radioactive waste will be carried out systematically and efficiently as responsibility as the installer of the nuclear power facility and generator of radioactive waste. This paper shows the present status of radioactive waste management in O-arai Research and Development Center, one of the research and development bases of JAEA. The management of low-level radioactive waste, including those accepted from outside operator of O-arai district, is carried out by the major premise of ensuring safety at O-arai Waste Management Facility. Treatment related to volume reduction and stabilization by means such as incineration and compression of solid waste, and solidification of liquid, as well as waste storage management is steadfastly promoted, so that these substances may be adequately stored and managed until they are disposed of.

JAEA Reports

MK-III Function Tests in JOYO; Primary main Cooling Pump

Isozaki, Kazunori; Saito, Takakazu; Sumino, Kozo; Yamazaki, Yuji*; Karube, Koji; Terano, Toshihiro; Sakaba, Hideo

JNC TN9410 2004-014, 172 Pages, 2004/06

JNC-TN9410-2004-014.pdf:48.0MB

This technical report describes MK-III function tests on the primary main cooling pump. MK-III function tests (SKS-1) before MK-III core configuration completed from October 17, 2001 to October 23, 2001. MK-III function tests (SKS-2) after MK-III core configuration completed from January 27, 2003 to February 13, 2003. The results of function tests were shown as follows; (1) The primary main pump was confirmed to do stable control on both CAS (cascade) mode and MAN (manual) mode in the flow control system. And also this was confirmed no-emanation trend both flow and revolution per minute against flow step response, too. (2) The main motor was shifted run-back operation in about 54 seconds after scram. Run-back operation of the main motor (A) was 167m3/h with 117 rpm. 185 m$$^{3}$$/h with 118 rpm was the main motor (B). And they were controlled within the limit of run-back operational revolution 122 rpm $$pm$$ 8 rpm. The flow was confirmed to maintain in 10 percent and over of the rated flow. (3) Succeeding operation to the pony motor was confirmed to do in about 39 seconds after the primary main pump trip. The pony motor (A) operation was 180m3/h with 124rpm. 190 m$$^{3}$$/h with 123 rpm was the pony motor (B). They were enough satisfied with the forgiven revolution per minute which was 93 rpm and over. And the flow was confirmed to maintain in 10 percent and over of the rated flow. (4) Free flow coast down characteristic of the primary main pump was confirmed that time constant was 10 seconds at both the trip and run-back operation time of the primary main pump. (5) Over flow column sodium level of the main pump duty operation was NL-1,550 mm Na by column (A), NL-1,468mm Na by column (B). They were smaller than NL-1,581 mm Na by the design value. Pressure loss value of the new IHX had more conservative value than the design value. (6) The primary main pump was confirmed which the rated flow could be restored no-scram by the instantaneous power loss within 0.6 second.

Journal Articles

Achievement of high fusion triple product, steady-state sustainment and real-time NTM stabilization in high-$$beta_p$$ ELMy H-mode discharges in JT-60U

Isayama, Akihiko; Kamada, Yutaka; Hayashi, Nobuhiko; Suzuki, Takahiro; Oikawa, Toshihiro; Fujita, Takaaki; Fukuda, Takeshi; Ide, Shunsuke; Takenaga, Hidenobu; Ushigusa, Kenkichi; et al.

Nuclear Fusion, 43(10), p.1272 - 1278, 2003/10

 Times Cited Count:127 Percentile:96.08(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

High performance operational limits of tokamak and helical systems

Yamazaki, Kozo*; Kikuchi, Mitsuru

Journal of Plasma and Fusion Research SERIES, Vol.5, p.28 - 35, 2002/00

Plasma operational boundaries of tokamak and helical systems are surveyed and compared with each other. Global confinement scaling lawas are similar and gyro-Bohm like, however, local transport process is different due to sawtooth oscillations in tokamaks and ripple transport loss in helical systems.for stability limit, achievable tokamak beta is explained by ideal or resistive MHD theories. beta values. On the other hand, beta values in helical system are beyond Mercier mode limit.

Journal Articles

Characterization of disruption phenomenology in ITER

Yoshino, Ryuji; D.J.Campbell*; E.Fredrickson*; Fujisawa, Noboru; N.Granetz*; Gruber, O.*; T.C.Hender*; D.A.Humphreys*; N.Ivanov*; S.Jardin*; et al.

Fusion Energy 2000 (CD-ROM), 4 Pages, 2001/05

no abstracts in English

Journal Articles

Results of ITER physics R&D, 4; Disruption, MHD and plasma control

Yoshino, Ryuji; Ozeki, Takahisa; Tokuda, Shinji; Iio, Shunji*; Yamazaki, Kozo*

Purazuma, Kaku Yugo Gakkai-Shi, 76(2), p.116 - 126, 2000/02

no abstracts in English

Journal Articles

Electromagnetic analysis in the tokamak fusion reactor and large helical device

Koizumi, Koichi; Yamazaki, Kozo*

Purazuma, Kaku Yugo Gakkai-Shi, 72(12), p.1352 - 1361, 1996/12

no abstracts in English

Journal Articles

Present status and future plan of ITER physics R&D expert group,4; Disruption, plasma control and MHD

Yoshino, Ryuji; Yamazaki, Kozo*; Tokuda, Shinji

Purazuma, Kaku Yugo Gakkai-Shi, 72(6), p.513 - 516, 1996/06

no abstracts in English

Oral presentation

Hydrogen removal properties from JT-60 open divertor tile by pulsed laser ablation

Miya, Naoyuki; Watanabe, Daisuke*; Sakawa, Yoichi*; Shibahara, Takahiro*; Sugiyama, Kazuyoshi*; Shoji, Tatsuo*; Yamazaki, Kozo*; Masaki, Kei; Tanabe, Tetsuo*

no journal, , 

no abstracts in English

Oral presentation

Removal of hydrogen from co-deposits on JT-60 open divertor using pulse laser ablation; Laser wavelength dependence

Sakawa, Yoichi*; Watanabe, Daisuke*; Shoji, Tatsuo*; Yamazaki, Kozo*; Masaki, Kei; Tanabe, Tetsuo*

no journal, , 

no abstracts in English

Oral presentation

Estimation of suitable laser-irradiation condition for hydrogen removal from JT-60 open tile

Watanabe, Daisuke*; Sakawa, Yoichi*; Shoji, Tatsuo*; Yamazaki, Kozo*; Masaki, Kei; Tanabe, Tetsuo*

no journal, , 

no abstracts in English

Oral presentation

Study on dosimetry method of the $$beta$$-ray 3 mm depth dose equivalent and protection measures with respect to the lens of the eye, 3; Adaptability to field works

Takimoto, Misaki; Okuyama, Shun; Yamazaki, Takumi; Ito, Yasuhisa; Takada, Chie; Tsujimura, Norio; Shiba, Kozo; Okada, Kazuhiko; Namiki, Atsushi

no journal, , 

no abstracts in English

16 (Records 1-16 displayed on this page)
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