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Journal Articles

Recent progress in the fusion neutrons, 3; Nuclear analysis by automatic conversion of CAD data

Sato, Satoshi; Kondo, Keitaro

Purazuma, Kaku Yugo Gakkai-Shi, 92(4), p.266 - 268, 2016/04

In the nuclear analysis of ITER, fusion DEMO reactor and IFMIF, etc., radiation transport calculations are conducted by using MCNP geometry data automatically created from 3-dimensional CAD data with CAD/MCNP conversion codes. In this review paper, we introduce the present status of the development on the CAD/MCNP conversion codes and examples of application. Also, we introduce how to visualize calculation results by MCNP.

Journal Articles

Recent progress in the fusion neutrons, 2; Nuclear analysis for fusion reactors

Konno, Chikara

Purazuma, Kaku Yugo Gakkai-Shi, 92(4), p.261 - 265, 2016/04

Useful information to not only beginners but also experts is introduced mainly for important points, which are basic but surprisingly unknown in, about calculation codes and nuclear data libraries in nuclear analyses for fusion reactors.

Journal Articles

Progress report of Japanese simulation research projects using the high-performance computer system Helios in the International Fusion Energy Research Centre

Ishizawa, Akihiro*; Idomura, Yasuhiro; Imadera, Kenji*; Kasuya, Naohiro*; Kanno, Ryutaro*; Satake, Shinsuke*; Tatsuno, Tomoya*; Nakata, Motoki*; Nunami, Masanori*; Maeyama, Shinya*; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 92(3), p.157 - 210, 2016/03

The high-performance computer system Helios which is located at The Computational Simulation Centre (CSC) in The International Fusion Energy Research Centre (IFERC) started its operation in January 2012 under the Broader Approach (BA) agreement between Japan and the EU. The Helios system has been used for magnetised fusion related simulation studies in the EU and Japan and has kept high average usage rate. As a result, the Helios system has contributed to many research products in a wide range of research areas from core plasma physics to reactor material and reactor engineering. This project review gives a short catalogue of domestic simulation research projects. First, we outline the IFERC-CSC project. After that, shown are objectives of the research projects, numerical schemes used in simulation codes, obtained results and necessary computations in future.

Journal Articles

Information on ITER Project, 56

Ohara, Hiroshi; Hayashi, Jennifer*

Purazuma, Kaku Yugo Gakkai-Shi, 92(3), p.236 - 237, 2016/03

no abstracts in English

Journal Articles

Liquid divertor

Shimada, Michiya; Miyazawa, Junichi*

Purazuma, Kaku Yugo Gakkai-Shi, 92(2), p.119 - 124, 2016/02

AA2015-0751.pdf:0.61MB

Actively convected liquid metal divertor is promising for providing a solution for issues of DEMO reactors including heat removal and disruptions. This chapter gives an overview of the motivation, research history, recent development, future perspective and issues to be resolved.

Journal Articles

Information on DEMO Design Special Team, 3

Sakamoto, Yoshiteru

Purazuma, Kaku Yugo Gakkai-Shi, 92(2), P. 149, 2016/02

Recent activities of DEMO Design Joint Special Team are reported. The team has been organized the working groups to treat important issues. The operation plan working group will identify what should DEMO carry out. The blanket working group will summarize the design guideline for DEMO blanket. The superconducting magnet working group will summarized the basic guideline and development strategy for the magnet design.

Journal Articles

ITPA (International Tokamak Physics Activity) meeting report, 53

Kawano, Yasunori; Akiyama, Tsuyoshi*; Ishikawa, Masao; Isobe, Mitsutaka*; Itami, Kiyoshi; Ejiri, Akira*; Peterson, B.*

Purazuma, Kaku Yugo Gakkai-Shi, 92(2), P. 145, 2016/02

no abstracts in English

Journal Articles

News from Broader Approach activities, 59

Hoshino, Kazuo; Matsunaga, Go; Okumura, Yoshikazu

Purazuma, Kaku Yugo Gakkai-Shi, 92(2), p.146 - 147, 2016/02

no abstracts in English

Journal Articles

Hydrogen isotope separation by cryogenic distillation

Yamanishi, Toshihiko

Purazuma, Kaku Yugo Gakkai-Shi, 92(1), p.21 - 25, 2016/01

AA2015-0316.pdf:0.93MB

In a fusion reactor, the hydrogen isotope separation system is required in the fuel cycle system to supply deuterium (D) and tritium (T) as its fuel. In ITER, 90% of T must be recycled through the isotope separation system. On the other hand; since the hydrogen (H) gas is finally exhausted to the environment, the T concentration in the H gas from the isotope separation system should be as low as reasonable achievable. Hence, the isotope separation system of a fusion reactor must have a large separation factor. The flow rate of the isotope separation system of a fusion reactor reaches to 300 mol/h. Only the cryogenic distillation method can meet the above conditions (large flow rate and separation factor) and is most likely used as a hydrogen separation system in a fusion reactor. In this chapter, several simulation methods and a set of experimental data of the cryogenic distillation columns are described in detail.

Journal Articles

Information on ITER Project, 55

Ohara, Hiroshi; Moriyama, Setsuko*; Hayashi, Jennifer*

Purazuma, Kaku Yugo Gakkai-Shi, 92(1), p.48 - 50, 2016/01

no abstracts in English

Journal Articles

Report of ITPA TG Meetings, 52

Shinohara, Koji; Hayashi, Nobuhiko; Isayama, Akihiko; Miyato, Naoaki; Urano, Hajime; Aiba, Nobuyuki

Purazuma, Kaku Yugo Gakkai-Shi, 91(12), p.797 - 800, 2015/12

no abstracts in English

Journal Articles

News from Broader Approach activities, 58

Hoshino, Kazuo; Matsunaga, Go; Okumura, Yoshikazu

Purazuma, Kaku Yugo Gakkai-Shi, 91(12), p.802 - 803, 2015/12

Holding of the 17th IFERC Project Committee (PC), the 16th IFMIF/EVEDA-PC and the progress of the JT-60SA were reported. In the IFERC-PC, total 33 participated including Maisonnier chairperson, JA-EU committee, experts and project members. They reported the status of each activity, discussed the planning of project 2016 and revised plan, and concluded technical advice to the BA Steering Committee (SC). In the IFMIF/EVEDA-PC, total 27 participated including Takatsu chairperson, JA-EU committee, experts and project members. They reported the status of each activity, discussed the planning of project 2016 and revised plan, and the BA-SC recommended the endorsement of the new project plan. In the JT-60SA, a rotary crane for assembly of the troidal field coil has been installed. The disassembly of the constraint jigs of the vacuum vessel which completed 340$$^{circ}$$ assembly has been progressed. 6 high temperature superconductor current leads for the troidal field coils had been delivered from EU.

Journal Articles

Information on DEMO Design Special Team, 2

Sakamoto, Yoshiteru

Purazuma, Kaku Yugo Gakkai-Shi, 91(11), P. 743, 2015/11

Recent activities of DEMO Design Joint Special Team are reported. The activities are firstly focused on the development of project management system. In order to share the information of BA DEMO Design Activity, the review meetings were held four times. The 2nd plenary meeting was also held at Rokkasho on 8th of October, where the participants mainly discussed on the promotion of industry involvement.

Journal Articles

Information on ITER Project, 54

Ohara, Hiroshi; Moriyama, Setsuko*; Hayashi, Jennifer*

Purazuma, Kaku Yugo Gakkai-Shi, 91(11), p.741 - 742, 2015/11

no abstracts in English

Journal Articles

News from Broader Approach activities, 57

Hoshino, Kazuo; Matsunaga, Go; Okumura, Yoshikazu

Purazuma, Kaku Yugo Gakkai-Shi, 91(10), p.700 - 701, 2015/10

The progress of IFMIF Prototype Accelerator in the IFERC site and the Satellite Tokamak (JT-60SA) project were reported. For the IFMIF Prototype Accelerator, two radio frequency (RF) sources of the RF quadrupole accelerator, seven high-voltage power supplies, and distribution cabinets were delivered from the CIEMAT institute in Spain and the installation was started. In the Satellite Tokamak project, the development for long term operation technique of the neutral beam injector has been achieved and thereby confirmed to be feasible for long term operation of JT-60SA. The 340$$^{circ}$$ torus assembly of vacuum vessel of the JT-60SA, which was started from May last year, has been completed. To send out information to the domestic community a major event in the BA activities.

Journal Articles

Information on ITER Project, 53

Hayashi, Jennifer*; Moriyama, Setsuko*; Ohara, Hiroshi

Purazuma, Kaku Yugo Gakkai-Shi, 91(9), P. 620, 2015/09

no abstracts in English

Journal Articles

News from DEMO Design Special Team, 1

Sakamoto, Yoshiteru

Purazuma, Kaku Yugo Gakkai-Shi, 91(8), P. 564, 2015/08

As a result of discussion of Fusion Research Working Group under MEXT, DEMO Design Joint Special Team has been established in Rokkasho Fusion Institute at 1st of June. The team is organized for DEMO conceptual design activity, and starts with 51 members including from industry and universities. The team is the project under the direct control of MEXT. The 1st meeting was held at Rokkasho on 18th of June. The participants discussed on the plan and schedule.

Journal Articles

ITPA (International Tokamak Physics Activity) meeting report, 51

Asakura, Nobuyuki

Purazuma, Kaku Yugo Gakkai-Shi, 91(8), P. 566, 2015/08

no abstracts in English

Journal Articles

ITPA (International Tokamak Physics Activity) meeting report, 50

Kawano, Yasunori; Akiyama, Tsuyoshi*; Ishikawa, Masao; Isobe, Mitsutaka*; Itami, Kiyoshi; Ejiri, Akira*; Peterson, B.*

Purazuma, Kaku Yugo Gakkai-Shi, 91(8), P. 565, 2015/08

no abstracts in English

Journal Articles

News from Broader Approach activities, 56

Hoshino, Kazuo; Matsunaga, Go; Okumura, Yoshikazu

Purazuma, Kaku Yugo Gakkai-Shi, 91(8), p.561 - 562, 2015/08

The new construction of Joint Research Building for the DEMO R&D at IFERC, progress of the IFMIF Prototype Accelerator and the Satellite Tokamak (JT-60SA) project were reported. The Joint Research Building processing the construction as a new place where carry out a part of project for the DEMO R&D in the rest of the BA activity period and it mainly consists of the laboratory/material testing room for the material evaluation and Be production room for handling of the metal beryllium. For the IFMIF Prototype Accelerator, completed the repairs and test run of the Interlock, successful of the continuity rated proton beam, then after setting of the radiation control area, successful production of the deuterium ion beam. For the JT-60SA, the installation of a Helium refrigerator which is one of the world's largest and a He buffer tank have been completed. The 4th Research Coordination meeting was held and they discussed the research plan and theme for the experiment proposal of JT-60SA.

681 (Records 1-20 displayed on this page)