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Ohshima, Hiroyuki; Morishita, Masaki*; Aizawa, Kosuke; Ando, Masanori; Ashida, Takashi; Chikazawa, Yoshitaka; Doda, Norihiro; Enuma, Yasuhiro; Ezure, Toshiki; Fukano, Yoshitaka; et al.
Sodium-cooled Fast Reactors; JSME Series in Thermal and Nuclear Power Generation, Vol.3, 631 Pages, 2022/07
This book is a collection of the past experience of design, construction, and operation of two reactors, the latest knowledge and technology for SFR designs, and the future prospects of SFR development in Japan. It is intended to provide the perspective and the relevant knowledge to enable readers to become more familiar with SFR technology.
Okumura, Yoshikazu; Gobin, R.*; Knaster, J.*; Heidinger, R.*; Ayala, J.-M.*; Bolzon, B.*; Cara, P.*; Chauvin, N.*; Chel, S.*; Gex, D.*; et al.
Review of Scientific Instruments, 87(2), p.02A739_1 - 02A739_3, 2016/02
Times Cited Count：7 Percentile：35.23(Instruments & Instrumentation)IFMIF is an accelerator based neutron facility having two set of linear accelerators each producing 125mA/CW deuterium ion beams (250mA in total) at 40MeV. The LIPAc (Linear IFMIF Prototype Accelerator) being developed in the IFMIF-EVEDA project consists of an injector, a RFQ accelerator, and a part of superconducting Linac, whose target is to demonstrate 125mA/CW deuterium ion beam acceleration up to 9MeV. The injector has been developed in CEA Saclay and already demonstrated 140mA/100keV deuterium beam. The injector was disassembled and delivered to the International Fusion Energy Research Center (IFERC) in Rokkasho, Japan, and the commissioning has started after its reassembly 2014; the first beam production has been achieved in November 2014. Up to now, 100keV/120mA/CW hydrogen ion beam has been produced with a low beam emittance of 0.2 
.mm.mrad (rms, normalized).
Okumura, Yoshikazu; Ayala, J.-M.*; Bolzon, B.*; Cara, P.*; Chauvin, N.*; Chel, S.*; Gex, D.*; Gobin, R.*; Harrault, F.*; Heidinger, R.*; et al.
Proceedings of 12th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.203 - 205, 2015/09
Under the framework of Broader Approach (BA) agreement between Japan and Euratom, IFMIF/EVEDA project was launched in 2007 to validate the key technologies to realize IFMIF. The most crucial technology to realize IFMIF is two set of linear accelerator each producing 125mA/CW deuterium ion beams up to 40MeV. The prototype accelerator, whose target is 125mA/CW deuterium ion beam acceleration up to 9MeV, is being developed in International Fusion Research Energy Center (IFERC) in Rokkasho, Japan. The injector developed in CEA Saclay was delivered in Rokkasho in 2014, and is under commissioning. Up to now, 100keV/120mA/CW hydrogen ion beams and 100keV/90mA/CW duty deuterium ion beams are successfully produced with a low beam emittance of 0.21 .mm.mrad (rms, normalized). Delivery of RFQ components will start in 2015, followed by the installation of RF power supplies in 2015.
Knaster, J.*; Ibarra, A.*; Ida, Mizuho*; Kondo, Keitaro; Kikuchi, Takayuki; Ohira, Shigeru; Sugimoto, Masayoshi; Wakai, Eiichi; Watanabe, Kazuhito; 58 of others*
Nuclear Fusion, 55(8), p.086003_1 - 086003_30, 2015/08
Times Cited Count：60 Percentile：95.24(Physics, Fluids & Plasmas)The International Fusion Materials Irradiation Facility (IFMIF), presently in its Engineering Validation and Engineering Design Activities (EVEDA) phase under the frame of the Broader Approach Agreement between Europe and Japan, has accomplished in summer 2013, on schedule, its EDA phase with the release of the engineering design report of the IFMIF plant, which is here described. Many improvements of the design from former phases are implemented, particularly a reduction of beam losses and operational costs thanks to the superconducting accelerator concept. In the Test Cell design, the separation of the irradiation modules from the shielding block gaining irradiation flexibility and enhancement of the remote handling equipment reliability and cost reduction. The released IFMIF Intermediate Engineering Design Report, which could be complemented if required concurrently with the outcome of the on-going EVA carried out since the entry into force of IFMIF/EVEDA in June 2007, will allow the decision making on its construction and/or serve as the basis for the definition of the next step, aligned with the evolving needs of our fusion community.
Wakai, Eiichi; Kondo, Hiroo; Kanemura, Takuji; Hirakawa, Yasushi; Furukawa, Tomohiro; Hoashi, Eiji*; Fukada, Satoshi*; Suzuki, Akihiro*; Yagi, Juro*; Tsuji, Yoshiyuki*; et al.
Proceedings of Plasma Conference 2014 (PLASMA 2014) (CD-ROM), 2 Pages, 2014/11
In the IFMIF/EVEDA (International Fusion Materials Irradiation Facility/ Engineering Validation and Engineering Design Activity), the validation tests of the EVEDA lithium test loop with the world's highest flow rate of 3000 L/min was succeeded in generating a 100 mm-wide and 25 mm-thick free-surface lithium flow steadily under the IFMIF operation condition of a high-speed of 15 m/s at 250
C in a vacuum of 10 
Pa. Some excellent results of the recent engineering validations including lithium purification, lithium safety, and remote handling technique were obtained, and the engineering design of lithium facility was also evaluated. These results will advance greatly the development of an accelerator-based neutron source to simulate the fusion reactor materials irradiation environment as an important key technology for the development of fusion reactor materials.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 90(4), p.267 - 268, 2014/04
It the IFERC Project Committee, the enhanced system computer has started a user service with high efficiency, a compatibility test device between SiC/SiC; Combination of materials and liquid Li-Pb alloy is scheduled to bring in Rokkasho in May at DEMO R&D, a Remote Lab software development between EU and Japan at ITER REC has started. In the IFMIF/EVEDA Project Committee, the prototype Accelerator, a preliminary work of the vacuum leak testing has started began to install it from March and expected to perform a beam testing around July. Also, got permission for use radiation generator apparatus of an injector, a demonstration of a lithium test loop will be continued until in this summer. All above matters were approved as annual reports. In Prototype Reactor Design platform meeting, had a lecture and presentation of necessary maintenance and inspection, safety and standard for reactor operation, and subjects and measures need to be considered from the core design.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 90(2), p.161 - 162, 2014/02
This time, BA Steering Committee, unpacking parts of injector of Accelerator, enhancement of computer rack at CSC are reported. In BA Steering Committee reported about work plan of 2014 of IFMIF/EVEDA project, IFERC project, and Satellite Tokamak project. And also, the explanation about the support activities was made by deputy governor of Aomori prefecture and village mayor. Steering Committee expressed their appreciation for the efforts of support by prefecture and village. In unpacking parts of injector of Accelerator, able to unpacking and confirming contents and LEBT vacuum leaking during a visitation of the persons in charge. Moreover, had a meeting about installment operation schedule with EU persons who in charge of it. In installment operation for computer rack to enhance high performance computer, completed transport, installment and started trail operation. MIC system installment expected over 200 Tflops performance enhancement.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(12), p.890 - 891, 2013/12
This time, Project Committees (PCs) of IFERC IFMIF/EVEDA, initiation of the Injector installation are reported. In IFMIF/EVEDA PC reported on progress of three sub-projects and reviewed, discussed and recommended about work plan of 2014. Completion of engineering design activity, establishment of the support organization for people sent from EU for installation/commissioning of the accelerator and solution of the use procedure of common fund were confirmed. IFIRC PC reported on progress of three sub-projects (DEMO R&D, CSC and REC) and reviewed discussed and recommended about work plan of 2014. The proposal 2014 work plan by Project Leader and renewed IFIRC project plan were agreed to be recommended for approval of the Steering Committee. Unpacking and checking of the packages of Injector from EU has been initiated under presence of CEA persons in charge with confirmation of the detailed schedule and procedure for installation and adjustment in the next year.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(10), P. 697, 2013/10
This time, held The 2nd ITER Experimentation Center Technical Meeting, The 11th ISFNT and visitation from the nuclear society. The meeting reconfirmed the schedule from 2013 to 2017, discussed network, high-speed data transmission, each task's progress for the remote experimentation, details of the new treaty of the PA and scheduled remote experimentation of the JT-60SA, collected information on progress of CODAC system at the ITER and future interfaces. The 11th ISFNT had the highest past presentations of short and long-term fusion technology R&D ever related to nuclear fusion science, engineering, lab, analyze, design, and safety. Also, one of the researchers from the IFERC got the Miya-Abdou Award. 40 people from an observation meeting of the Nuclear Society visited the Cycle facility of the JNFL and IFERC of the JEAE, The CSC&REC Building, the DEMO R&D Building and the IFMIF/EVEDA Accelerator Building. Much interpellation existed about R&D of the HPC and DEMO.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(8), p.554 - 555, 2013/08
This time, introduction of the parts of the injector, lecture presentation for the fusion energy in Aomori city, visit of Hoshioki middle high school in Sapporo and the IFERC technical meeting, etc., are reported. The parts of the injector of IFMIF/EVEDA prototype accelerator arrived at IFMIF/EVEDA accelerator building. a lecture presentation for the fusion energy was held to promote more understanding of current states of the ITER project and the BA activities for people in and around Aomori prefecture. About 100 participants got further understanding through the presentations about the ITER project and the BA activities' panels display and demonstration of the plasma generation. The 161th middle school students from Sapporo came to view the super computer at the IFERC on June 3rd. for demo R&D, and BA task technical meeting for the structural material of demo were held in July. Concentrated discussion was held among people from the JAEA, universities and the MEXT.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(6), p.427 - 428, 2013/06
This time, the 12th BA Steering Committee on April 23 in Rokkasho, the first Japan-EU Technical Meeting on ITER Remote Experimentation Centre, and current states, etc. are reported. At the BA Steering Committee, the 2012 annual report of the three projects and revised project plan were approved. For the IFMIF/EVEDA project achievement of the lithium loop facility and introduction of the injector of the Prototype Accelerator were appreciated. For the IFERC project, many results achieved through its activities. For the ST project progress of the procurement activity between Japan and EU, especially initiation of assembly work, were appreciated. The first Japan and Europe technical meeting of ITER Remote Experimentation Centre (REC) was held to discuss its framework based on the overall plan for REC approved by the latest BA Steering Committee. Examination items and persons in charge for the individual items, overall schedules, and initial procurement items were agreed.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(4), P. 263, 2013/04
This time, the Project Committees of IFERC and IFMIF/EVEDA (both held on 21, 22th of March) and the recent status of the HPC were reported. In the IFERC Project Committee, the Annual Report 2012 of IFERC project was reviewed and confirmed including researches on safety of the DEMO reactor. Also revision of the Project Plan reflecting a new proposal to enhance the DEMO design activity with the installation of additional equipment based on the recommendations from the peer review on the DEMO R&D conducted in 2012. In IFMIF project committee meeting, we confirmed the annual report on the IFMIF/EVEDA project, including the state of injector of the IFMIF prototype accelerator and Li test loop achieving the maximum flow rate 20m/s and discussed the revision of the project plan reflecting it and summarized the recommendations for the Steering Committee. For the HPC, which keeps high operating ratio and high utilization factor, user trainings were held at Kyoto University and JAEA.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 89(2), p.130 - 131, 2013/02
This time, current status of the IFMIF Prototype Accelerator and the IFERC site are reported. Acceptance test of the injector of the IFMIF Prototype Accelerator was carried out on 20-23 November 2012 at the CEA Saclay. Finally, a series of tests using deuterium ion beam was carried out with F4E witnesses present and JAEA experts. As a result, the requirements in the Procurement Agreement were satisfied, and then the injector would be transferred to the IFERC Site as scheduled. For the shipping, the injector was disassembled and packed in about twenty boxes with JAEA witnesses in charge of the installation on 3-7 December. On the other hand, in the accelerator room of the IFMIF/EVEDA Accelerator Building in the IFERC site, works for making a part of the additional shielding for the Beam Dump and closing the opening sections for cables/piping are being in progress until end of February 2013. The IFERC site is now covered with snow.
Ohira, Shigeru; Fujita, Takaaki
Purazuma, Kaku Yugo Gakkai-Shi, 88(12), p.768 - 770, 2012/12
This time, (1) the 11th BA Steering Committee (6 Nov.), (2) the 10th IFMIF/EVEDA Project Committee (PC, 18-19, Oct.), (3) the 11th IFERC PC (2-3 Oct.), (4) the 11th Satellite Tokamak (JT-60 SA) PC, latest activities in Rokkasho and progress of upgrade for JT-60SA are reported. At (1), the 2013 Annual Program and revised Project Plan, etc. were approved. At (2), the review of SRF Linac test, etc. were reported and discussed. At (3), the overall plan of REC, implementation of new four DEMO R&D items, etc. were presented and discussed. At (4), progress of upgrade for JT-60SA were reported from EU-IA and JA-IA and reviewed and discussed. The 3rd Platform Meeting for DEMO safety was held with participants from JAEA, Industry and universities. Technical meeting for installation and commissioning of the IFMIF Prototype Accelerator was held. Manufacturing of parts for JT-60SA are in progress in both EU and Japan, and disassemble of JT-60U main parts has been done in Oct. as scheduled.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 88(10), p.621 - 622, 2012/10
This time, open site of the International Fusion Energy Research Centre (IFERC), Asian CORE International Symposium on Advanced Energy Systems and Materials, presentations at the international meetings at Europe and USA and "Science Cafe" held by JAEA in Aomori city. At the open site on 22nd of Sep., which was the 2nd one since the IFERC site was established, variety of attractions including the tour to "Rokuchan (Helios)" supercomputer and laboratories in the DEMO R&D Building. At the Asian CORE International Symposium, jointed to the 2012 Summer Seminar of AESJ, a lot of discussions on presentations by oral and posters was held and also tour to the IFERC site was carried out. In August and September, a lot of international meetings were held and variety of the BA activities were introduced and presented. On 25th September, a first "Science Cafe" was held in Aomori City with a theme "Challenge to future -fusion energy-". The tutor and Audience had intensive discussion.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 88(8), P. 460, 2012/08
This time, inauguration of the new Project Leader of IFMIF/EVEDA project and visits of the French ambassador to Japan and the Minister of Education, Culture, Sports, Science and Technology (MEXT) are reported. On July 9th 2012, Dr. Juan Knaster, a new project leader of IFMIF/EVADA project, who had worked for Large Hadron Collider Project at CERN, Joint Central Team for ITER/EDA at the Joint Work Site in Naka Fusion Institute and ITER at Cadarache as a technical director of TF coil. On June 21st, a French ambassador, M. Christian MASSET and his party visited Rokkasho site. They had a tour to the super computer procured by Europe (nicknamed "Roku-chan") in the CSC & REC Building. On June 28th, Hirofumi Hirano, the Minister of MEXT, visited Rokkasho site and had a tour to "Roku-chan" and laboratories for Research and Development in DEMO R&D building. At the press meeting after his tour, the minister gave a comment on the accumulation of excellent knowledge expected.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 88(6), p.339 - 340, 2012/06
This time, the 10th BA Steering Committee Meeting held on 25th April 2012, discussion on schedule of installation and tests for IFMIF/EVEDA prototype accelerator, usage of the CSC High Performance Computer by EU and Japanese users and status of the Rokkasho site were reported. At the 10th BA Steering Committee Meeting, Annual reports of the three Projects (IFMIF/EVEDA, IFERC and JT-60SA) were approved and the individual Project Plans, including reduction of the period for the integrated test for the Prototype Accelerator, start of research of DEMO reactor safety and extension of the JT-60SA Project until December 2019, were approved. On 23-27 of April, discussion on schedule of installation and tests for IFMIF/EVEDA prototype accelerator were held with presentations of status and shipping/installation/test of the individual components and site tours at the individual institutions in charge of design and manufacturing in EU. Rokkasho BA site is now in a season of "fog".
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 88(4), p.238 - 239, 2012/04
This time, the 10th IFERC Project Committee Meeting held on 19-20th March 2012, the inauguration ceremony of the CSC High Performance Computer (HPC), establishment of the radiation controlled area and use of RI in DEMO R&D Building, and situation of the facilities related IFMIF/EVEDA are reported. At the 10th IFERC Project Committee Meeting, through check and review of the Annual Report 2011 of the IFERC Project and the revised Project Plan, including research of DEMO reactor safety, reflected with the Annual Report, recommendation to the Steering Committee was summarized. At the inauguration ceremony of the HPC, more than 120 people, attended for celebration. Presentations of the outline of the HPC and tour to the computer rooms were given. Establishment of radiation controlled area and introduction of the first RI (tritiated water 38 GBq in total) were done at DEMO R&D Building. Outdoor type cubicles for the electric systems for the IFMIF/EVEDA prototype accelerator were installed.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 88(2), P. 135, 2012/02
This time, the 4th IFMIF Workshop, operation of the HPC and recent status of the BA Rokkasho Site were reported. In the 4th IFMIF Workshop, which was held in Naka Fusion Institute on 5-9 December 2011, design and manufacture of the systems and components manufactured for the validation tests, the engineering design of IFMIF, etc., were reviewed and discussed. Also introduction of progress and discussion for issues and future plan were done. At the 6th Progress Review Meeting about the CSC HPC held at the JAEA Tokyo Office, the final result of the HPC performance test was reported, which showed that the performance achieved satisfy the goal (or moer), e.g., Linpack: 1.200 Pflop/s (Goal: 1.09 Pflops). The HPC has been operated for the Light House project since 10th of January. In Aomori prefecture, the snow accumulation since the last year reached a level as 2.5 times much as the average. In the Rokkasho BA Site, daily work for snow removal is needed.
Ohira, Shigeru
Purazuma, Kaku Yugo Gakkai-Shi, 87(12), p.845 - 846, 2011/12
This time, the 9th BA Steering Committee, held on 25th October at Lausanne, Swiss, test run of the CSC high performance computer, initiation of construction of the utility facilities for the IFMIF/EVEDA Accelerator and Korea-Japan Workshop of fusion reactor technology on 9-10th November were reported. In the 9th BA Steering Committee, Work Programs 2012 recommended by individual Project Committees were approved, and also minor amendment of the Cost Allocation Table and Project Plans and approved. Examination of a revised Project Plan taking into account of repair of the Li loop for IFMIF/EVEDA was ordered. The last delivery of the computer racks of the HPC by Bull was done at the end of November. Some test run has been carried out, which resulted in marking 442.4 Tflops using LINPAC code. R&D items were open to applications. A shelter for the cryo-system and heat exchangers for the IFMIF/EVEDA Prototype Accelerator was completed and the cooling tower was installed.
