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Journal Articles

Information of ITER project, 35

Sugimoto, Makoto; Moriyama, Setsuko

Purazuma, Kaku Yugo Gakkai-Shi, 88(9), P. 533, 2012/09

no abstracts in English

Journal Articles

Information on ITER project, 34

Moriyama, Setsuko; Ueno, Kenichi; Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 88(7), p.389 - 390, 2012/07

no abstracts in English

Journal Articles

Information on ITER project, 33

Ueno, Kenichi; Sugimoto, Makoto; Moriyama, Setsuko

Purazuma, Kaku Yugo Gakkai-Shi, 88(5), p.291 - 292, 2012/05

no abstracts in English

Journal Articles

Information on ITER project, 32

Ueno, Kenichi; Moriyama, Setsuko; Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 88(3), p.199 - 200, 2012/03

no abstracts in English

Journal Articles

Information of ITER project, 14

Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 85(3), p.131 - 132, 2009/03

On 15 January 2009, the ground breaking ceremony for the jacketing fabrication works of ITER conductors was held on Wakamatsu works, Nippon Steel Engineering Corp as supplier of ITER conductor fabrication for its initiation of the construction and safe operation. It is great step for the procurement of ITER conductor. JAEA is supporting the staffing of ITER Organization by Japanese according to assignment by the Government of Japan. The briefing sessions have been held by JAEA as the supporting activities. The briefing session were held on the U.S cooperation with Washington office and held on Tsukuba cooperation with AIST. These were good opportunity for the PR for the ITER project and its organization.

Journal Articles

Information of ITER project, 13

Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 85(1), p.54 - 55, 2009/01

On 19-20 November 2008, the ITER Council, the Governing Body of ITER Project, was held as its third meeting. The two-day meeting in Cadarache brought together representatives from the seven ITER Members. An indication of the progress of the ITER project was the signature at the meeting of five Procurement Arrangements involving the European, Japanese and Korean Domestic Agencies. These signatures are essential milestones for the project and mark a substantial step forward towards construction. Joint exhibition among ITER Organization and DAs including JAEA was presented at Fusion Energy Conference, Geneva, Switzerland. It was good opportunity to show the progress of ITER project.

Journal Articles

Latest design of liquid lithium target in IFMIF

Nakamura, Hiroo; Agostini, P.*; Ara, Kuniaki; Cevolani, S.*; Chida, Teruo*; Ciotti, M.*; Fukada, Satoshi*; Furuya, Kazuyuki*; Garin, P.*; Gessii, A.*; et al.

Fusion Engineering and Design, 83(7-9), p.1007 - 1014, 2008/12

 Times Cited Count:14 Percentile:27.64(Nuclear Science & Technology)

This paper describes the latest design of liquid lithium target system in IFMIF. Design requirement of the Li target is to provide a stable Li jet with a speed of 20 m/s to handle an averaged heat flux of 1 GW/m$$^{2}$$. A double reducer nozzle and a concaved flow are applied to the target design. On Li purification, a cold trap and two kinds of hot trap are applied to control impurities below permissible levels. Nitrogen concentration shall be controlled below 10 wppm by one of the hot trap. Tritium concentration shall be controlled below 1 wppm by an yttrium hot trap. To maintain reliable continuous operation, various diagnostics are attached to the target assembly. Among the target assembly, a back-plate made of RAFM is located in the most severe region of neutron irradiation (50 dpa/y). Therefore, two design options of replaceable back wall and their remote handling systems are under investigation.

Journal Articles

Information of ITER project, 12

Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 84(11), P. 844, 2008/11

The recent status of ITER project, regarding with successfully completion of test for the ITER poloidal field conductor insert as called PF insert. The test was carried out under the framework of ITER project and collaboration with ITER Organization and EU at JAEA Naka Fusion Research Institute. And PF insert consist of NbTi superconductor that will be applied to ITER poloidal field coils. In the results, PF insert was successfully achieved stable operation current of 52kA under magnetic flux density of 6.4T and temperature of 4.5 K as expected.

Journal Articles

Information of ITER project, 11

Sugimoto, Makoto

Purazuma, Kaku Yugo Gakkai-Shi, 84(9), p.606 - 607, 2008/09

The recent status of ITER project, regarding with (1) successful demonstration of the full size first wall as the test blanket module, and (2) briefing sessions for ITER project are described. The demonstration of full size first wall has been successfully developed by HIP joint between low activation ferrite (F82H) and Cupper. Also, the heat flux examination of the first wall was successfully done under the same operation condition of ITER without nuclear flux. The briefing sessions for the industry were held 8 times to explain the procurement on ITER and for the expert were held 7 times to explain the staff recruitment on ITER organization.

JAEA Reports

Review of JAEA activities on the IFMIF liquid lithium target in FY2006

Ida, Mizuho; Nakamura, Hiroo; Chida, Teruo*; Miyashita, Makoto; Furuya, Kazuyuki*; Yoshida, Eiichi; Hirakawa, Yasushi; Miyake, Osamu; Hirabayashi, Masaru; Ara, Kuniaki; et al.

JAEA-Review 2008-008, 38 Pages, 2008/03

JAEA-Review-2008-008.pdf:9.37MB

Engineering Validation Design and Engineering Design Activity (EVEDA) of the International Fusion Materials Irradiation Facility (IFMIF) is under going. IFMIF is an accelerator-based Deuterium-Lithium (D-Li) neutron source to produce intense high energy neutrons and a sufficient irradiation volume for testing candidate materials for fusion reactors. To realize such a condition, 40 MeV deuteron beam with a current of 250 mA is injected into high speed liquid Li flow with a speed of 20 m/s. In target system, nuclear heating due to neutron causes thermal stress especially on a back-wall of the target assembly. In addition, radioactive species such as beryllium-7, tritium and activated corrosion products are generated. In this report, thermal stress analyses of the back-wall, mechanical tests on weld specimen made of the back-wall material, estimations of beryllium-7 behavior and worker dose at the IFMIF Li loop and consideration on major EVEDA tasks are summarized.

Journal Articles

Gas evolution from insulating materials for superconducting coil of ITER by gamma ray irradiation at liquid nitrogen temperature

Idesaki, Akira; Koizumi, Norikiyo; Sugimoto, Makoto; Morishita, Norio; Oshima, Takeshi; Okuno, Kiyoshi

AIP Conference Proceedings 986, p.169 - 173, 2008/03

A laminated material composed of glass cloth/polyimide film/epoxy resin will be used as an insulating material for superconducting coil of ITER. In order to keep safe and stable operation of the superconducting coil system, it is indispensable to evaluate radiation resistance of the material, because the material is exposed to high radiation field of 10 MGy at low temperature of 4 K. In this work, the gas evolution from the laminated material by gamma ray irradiation at liquid nitrogen temperature (77 K) was investigated, and the difference of gas evolution behavior due to difference of components in the epoxy resin was discussed. As a result, it was found that the main gases from the epoxy resin by the irradiation were hydrogen, carbon monoxide and carbon dioxide, and that the amount of the gases from epoxy resin containing cyanate ester was 30-40% less than that from the epoxy resin containing tetraglycidyl-diaminophenylmethane (TGDDM).

Journal Articles

Design of the control application tools for J-PARC 3GeV RCS

Kawase, Masato; Takahashi, Hiroki; Ito, Yuichi; Sawa, Shiori*; Sugimoto, Makoto*

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.274 - 276, 2008/00

no abstracts in English

Journal Articles

Current status of the control system for J-PARC accelerator complex

Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Shen, G.; Kato, Yuko; Ito, Yuichi; Ikeda, Hiroshi*; Ishiyama, Tatsuya*; Tsuchiya, Hitoshi*; et al.

Proceedings of International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS '07) (CD-ROM), p.62 - 64, 2007/10

J-PARC is a large scale facility of the proton accelerators for the multi-purpose of scientific researches in Japan. This facility consists of three accelerators and three experimental stations. Now, J-PARC is under construction, and LINAC is operated for one year, 3GeV synchrotron has just started the commissioning in this October the 1st. The completion of this facility will be next summer. The control system of accelerators established fundamental performance for the initial commissioning. The most important requirement to the control system of this facility is to minimize the activation of accelerator devices. In this paper, we show that the performances of each layer of this control system have been achieved in the initial stage.

Journal Articles

Technology development for the construction of the ITER superconducting magnet system

Okuno, Kiyoshi; Nakajima, Hideo; Sugimoto, Makoto; Isono, Takaaki; Kawano, Katsumi; Koizumi, Norikiyo; Hamada, Kazuya; Nunoya, Yoshihiko; Matsui, Kunihiro; Nabara, Yoshihiro; et al.

Nuclear Fusion, 47(5), p.456 - 462, 2007/05

 Times Cited Count:7 Percentile:70.85(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Investigation of high flux test module for the International Fusion Materials Irradiation Facilities (IFMIF)

Miyashita, Makoto; Yutani, Toshiaki*; Sugimoto, Masayoshi

JAEA-Technology 2007-016, 62 Pages, 2007/03

JAEA-Technology-2007-016.pdf:3.2MB

This report describes investigation on structure of a high neutron flux test module (HFTM) for the International Fusion Materials Irradiation Facilities (IFMIF). The HFTM is aimed for neutron irradiation of a specimen in a high neutron flux domain of the test cell for irradiation ground of IFMIF. We investigated the overall structure of the HFTM that was able to include specimens in a rig and thermocouple arrangement, an interface of control signal and support structure. Moreover, pressure and the amount of the bend in the module vessel (a rectangular section pressure vessel) were calculated. The module vessel did a rectangular section from limitation of a high neutron flux domain. Also, we investigated damage of thermocouples under neutron irradiation, which was a temperature sensor of irradiation materials temperature control demanded high precision. Based on these results, drawings on the HTFM structure.

Journal Articles

Technology development for the construction of ITER superconducting magnet system

Okuno, Kiyoshi; Nakajima, Hideo; Sugimoto, Makoto; Isono, Takaaki; Kawano, Katsumi; Koizumi, Norikiyo; Hamada, Kazuya; Nunoya, Yoshihiko; Nabara, Yoshihiro; Kitamura, Kazunori; et al.

Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM), 8 Pages, 2007/03

The ITER superconducting magnet system consists of 18 TF coils, one CS and six Poloidal Field (PF) coils. Among six PTs, Japan, EU and US will be responsible for major part of the superconducting magnets, and Japanese contribution will be the largest, including the following four areas: part of TF conductors, about half (9 out of 19) of TF coil winding packs, most of TF coil structures and part of CS conductor. Since 2004, Japan Atomic Energy Agency (JAEA) started preparation activities for procurement, including manufacturing studies to identify detailed fabrication processes and tools for critical components, such as TF coil winding and case, and manufacturing demonstrations at full scale level on Nb$$_{3}$$Sn strands and conductors and cryogenic structural materials, such as coil case segments and radial plates. Details are described in the following sections.

Journal Articles

Japanese contributions to the procurement of the ITER superconducting magnet

Okuno, Kiyoshi; Nakajima, Hideo; Sugimoto, Makoto; Isono, Takaaki

Fusion Engineering and Design, 81(20-22), p.2341 - 2349, 2006/11

 Times Cited Count:2 Percentile:81.11(Nuclear Science & Technology)

Japan is expected to make a major contribution to the procurement of the ITER superconducting magnet system. The ITER magnet system consists of 18 TF coils, one CS with six modules and six PF coils. The TF coils and CS have major features in unprecedented size of the magnets and structures and operations at 11 to 13 T high fields that require Nb$$_{3}$$Sn superconductor. Because of these features, significant efforts were made towards developing superconducting magnet technology to a level that will allow the ITER magnets to be built with confidence. The construction and testing of the CS and TF model coils have therefore been performed during the ITER Engineering Design Activity (EDA), and all ITER RD goals have been achieved. Based on these achievements, further development activities are now being performed at JAERI in tight collaboration with industry for the preparation of the ITER construction. The activities include analytic studies on design improvement and optimization, manufacturing studies to identify the detailed fabrication processes and tools, and manufacturing demonstrations on full-scale structural components (several tens of tons) such as made of new cryogenic materials, JJ1 and strengthened 316LN. Results from these activities will provide firm technical basis to achieve required performance of the magnets while maintaining both project schedule and cost and to reduce technical risks that may happen during the manufacturing phase.

Journal Articles

J-PARC 3GeV RCS control system

Takahashi, Hiroki; Kawase, Masato; Sakaki, Hironao; Yoshikawa, Hiroshi; Ishiyama, Tatsuya*; Ito, Yuichi; Kato, Yuko; Sugimoto, Makoto*; Suzuki, Takahiro*

Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.442 - 444, 2006/08

no abstracts in English

Journal Articles

RDB system in J-PARC LINAC and its application to commissioning, 2

Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Shen, G.; Kiyomichi, Akio; Kamikubota, Norihiko*; et al.

Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.373 - 375, 2006/00

A Relational database (RDB) system, which is the core of the J-PARC Linac control system, has been developed. The beam commissioning of Linac is planned to start in December 2006. The RDB sytem consists of the following databases; "DB1", which records basic device parameters, "DB2", which acquires online EPICS data, "Operation Log DB", which records a history of operating parameters, and "Commissioning DB", which holds information on geometry of devices and commissioning. We report on the development status of each DB as well as status of the unified commissioning environment software which utilizes these databases.

Journal Articles

Construction of GUI for J-PARC LINAC machine protection system

Ishiyama, Tatsuya*; Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Ueda, Shinji*; Sugimoto, Makoto*; et al.

Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.370 - 372, 2006/00

no abstracts in English

128 (Records 1-20 displayed on this page)