2020年
10th ACASC/2nd Asian-ICMC/ CSSJ Joint Conference
H.Utoh, R. Hiwatari, Y. Sakamoto, Y. Someya, N. Nakajima, and Joint Special Design Team for Fusion Demo, "Conceptual design study of superconducting magnet system for the JA DEMO"
24th International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI-24)
S. Kajita, N. Ohno, N. Yoshida, "Tungsten Fuzz: Deposition Effects and Influence to Fusion Devices"
K. Hanada, N. Yoshida, M. Hasegawa, M. Oya, Y. Oya, I. Takagi, A. Hatayama, T. Shikama, H. Idei, Y. Nagashima, R. Ikezoe, T. Onchi, K. Kuroda, S. Kawasaki, A. Higashijima, T. Nagata, S. Shimabukuro, K. Nakamura, S. Murakami, Y. Takase, X. Gao, H. Liu, and J. Qian, "Overview of recent progresson steady state operation of all-metal plasma facing wall device, QUEST"
S. Masuzaki, M. Yajima, K. Ogawa, G. Motojima, M. Tokitani, M. Isobe, T. Otsuka and the LHD Experiment Group, "Investigation of the distribution of remaining tritium in dvertorin the Large Helical Device"
Y.Oya, M. Yajima, M.Nakata, M.Zhao, Q.Zhou, M.Tokitani, S. Masuzaki, "Evaluation of All Hydrogen Isotopes (H, D, T) Retentions in Tungsten Material Probes Exposed to the 2017 Plasma Campaign in LHD"
M. Oya, M. Shimada, C.N. Taylor, M.I. Kobayashi, Y. Nobuta, Y. Yamauchi, Y. Oya, Y. Ueda and Y. Hatano, "Deuterium retention in tungsten irradiated by high-dose neutrons at high temperature"
M. Yajima, S. Masuzaki, N. Yoshida, M. Tokitani, T. Otsuka, Y. Oya, Y. Torikai, G. Motojima, "Investigation of Tritium Retention and Surface Properties on the First Wall of LHD"
Q. Yue, K. Hanada, M. Oya, H. Ide, R. Ikezoe, S. Matsuo, S. Kojima, T. Onchi, K. Kuroda, N. Yoshida, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata, S. Kawasaki, Y. Liu, "Research on Dynamic Retention Measurement using Fast Ejecting System of Targeted Sample (FESTA) in QUEST"
N. Ohno, H. Takano, S. Kajita, H. Tanaka, S. Hattori, Y. Imaeda, "Evaluation of Axial Decay Length of Plasma Pressure in Detached Plasma"
H. Tanaka, Y. Hayashi, S. Kajita, H.J. van der Meiden, M. Yoshikawa, J.W.M. Vernimmen, J. Scholten, I. Classen, T.W. Morgan, N. Ohno. "Cross-field Transport in Detached Helium Plasmas in Magnum-PSI"
N. Asakura, K. Hoshino, Y. Homma and Joint Special Design Team for Fusion DEMO, "Simulation Studies of the Partially Detached Divertor and Effects of the SOL and Divertor Plasma Transport for Japanese DEMO Reactor"
31st Symposium on Fusion Technology (SOFT2020)
K. Katayama, Y. Someya, T. Chikada, K. Tobita, H. Nakamura, Y. Hatano, R. Hiwatari and Y. Sakamoto, "Effect of temperature gradient on tritium permeation rate to cooling water in JA DEMO condition"
D. Motoi, K. Ibano, Y. Kikuchi, S. Saito, T. Okita, E. Hoashi and Y. Ueda, "Study on pulse shape dependence of tungsten mass erosion under disruption-like heat load in high magnetic field"
H. Matsuura, T. Suganuma, Y. Koga, M. Naoi, K. Katayama, T. Otsuka, M. Goto, S. Nakagawa, S. Hamamoto, E. Ishitsuka, K. Tobita, S. Konishi, R. Hiwatari, Y. Someya, and Y. Sakamoto, "T containment property of Zr-included Li rod in high-temperature gas-cooled reactor as a T production device for fusion reactors"
D. Henzen, K. Katayama, H. Matsuura, "Evaluation of tritium confinement performance of the assembly composed of Zr and Al2O3 simulating Li rod"
A. Ipponsugi, K. Katayama, T. Hoshino, "Tritium Release Behavior from Neutron-Irradiated Li2TiO3 pebbles Long-term Heated under H2 Atmosphere"
29th International Toki Conference
Y. Itakura, T. Fujita, A. Okamoto, "Edge transport barrier model for simulating H-mode operation scenario in DEMO with integrated plasma transport code TOTAL"
Q. Yue, K. Hanada, M. Oya, S. Kojima, H. Idei, T. Onchi, K. Kuroda, N. Yoshida, R. Ikezoe, M. Hasegawa, S. Shimabukuro, A. Higashijima, T. Nagata, S. Kawasaki, "Difference of Dynamic Retention from Different Samples Using Fast Ejecting System of Targeted Sample (FESTA)"
M. Oya, R. Ikeda, K. Katayama and K. Ohya, "Simulation of Deuterium Retention in Tungsten under Periodic Deuterium Plasma Irradiation"
3rd Asia Pacific Symposium on Tritium Science (APSOT-3)
Y. Hara, K. Katayama, M. Oya, D. Mori, "Modeling of Hydrogen Permeation Behavior through Tungsten Deposition Layer Growing on Nickel Substrate by Hydrogen Plasma Sputtering"
R. Oyama, A. Ipponsugi, T. Matsumoto, K. Katayama, "Influence of chemical form of bred tritium in the blanket on tritium dynamics in fuel cycle system of fusion reactors"
R. Oyama, A. Ipponsugi, T. Matsumoto, K. Katayama, "Influence of chemical form of bred tritium in the blanket on tritium dynamics in fuel cycle system of fusion reactors"
The 33rd International Symposium on Superconductivity
H.Utoh, H. Nakajima, R. Hiwatari, Y. Sakamoto, Y. Someya, N. Aiba, N. Nakajima, and Joint Special Design Team for Fusion Demo, "Design study of superconducting magnet system for JA DEMO"
2019年
17th International Workshop on Plasma Edge Theory in Fusion Devices
Y. Homma, K. Hoshino, S. Yamoto, S. Tokunaga, N. Asakura, Y. Sakamoto and Joint Special Design Team for Fusion DEMO, "Kinetic effects on the thermal force on impurity under low collisional condition in DEMO scrape-off layer"
14th International Symposium on Fusion Nuclear Technology (ISFNT-14)
Y. Sakamoto, N. Hayashi, S.Tokunaga, N. Aiba, A. Matsuyama, N. Asakura, R. Hiwatari, H. Utoh, Y. Someya, Y. Homma, Y. Miyoshi, K. Tobita and the Joint Special Design Team for Fusion DEMO, "Progress of Plasma Scenario Modeling for JA DEMO"
R. Hiwatari, N. Asakura, H. Utoh, S. Tokunaga, N. Nakajima, Y. Homma, Y. Miyoshi, Y. Someya, Y. Sakamoto, K. Tobita and Joint Special Design Team for Fusion DEMO, "Basic concept and strategy of Japan’s fusion demonstration plant : JA DEMO"
H. Utoh, G. Matsunaga, H. Togashi, R. Hiwatari, Y. Sakamoto, K. Tobita and Joint Special Design Team for Fusion DEMO, "Estimation of Magnetic Error Field with Alleviating Fabrication Tolerance of Large Superconducting Magnets on JA DEMO reactor"
Y. Someya, K. Tobita, R. Hiwatari, Y. Sakamoto and Joint Special Design Team for Fusion DEMO, "Conceptual design for higher capability of the tritium production by the honeycomb structure blanket of JA DEMO"
Y. Miyoshi, R. Hiwatari, Y. Someya, N. Asakura, S. Tokunaga, Y. Hommm, Y. Sakamoto, K. Tobita, The Joint Special Design Team for Fusion DEMO, "Effect of dragged magnetic field lines into RAFM steel blanket modules on first wall
heat load"
N. Asakura, "Recent Developments of Plasma Exhaust and Divertor Design for Tokamak DEMO Reactors"
6th IAEA DEMO Programme Workshop (DPWS-6)
Y. Sakamoto, N. Hayashi, N. Aiba, H. Utoh, and the Joint Special Design Team for Fusion DEMO, "Plasma Scenario Modeling for JA DEMO"
3rd Technical Meeting on Divertor Concepts
N. Asakura, Y. Homma, K. Hoshino, Y. Sakamoto, and the Joint Special Design Team for Fusion DEMO, "Investigation of divertor operation for Japanese DEMO under low density SOL and large power exhaust of Psep/R~30 MW/m level"
N. Asakura, S. Kakudate, S. Suzuki, H. Utoh, Y. Someya, R. Hiwatari, Y. Sakamoto, and the Joint Special Design Team for Fusion DEMO, "Progress of divertor design concept for Japanese DEMO"
28th International Toki Conference
H. Utoh and the Joint Special Design Team for Fusion DEMO, "Development of engineering design for JA DEMO concept"
2018年
5th DEMO Programme Workshop
S. Kakudate, “DEMO Service Joining Technology” (invited)
Y. Sakamoto, S. Tokunaga, N. Hayashi, T. Wakatsuki, S. Ide, K. Tobita and the Joint Special Design Team for Fusion DEMO, “Operation scenario development and control issues on DEMO”
H. Utoh, G. Matsunaga, Y. Sakamoto and the Joint Special Design Team for Fusion DEMO, “Evaluation of magnetic error field based on accuracy of superconducting magnets in DEMO
23rd International Conference on Plasma Surface Interactions in Controlled
Fusion Devices (PSI-23)
N. Asakura, K. Hoshino, S. Tokunaga, Y. Homma, and Joint Special Team for Demo
Design, “Simulation Study of the Divertor Operation for a DEMO Fusion Reactor”
12th International Conference on Open Magnetic Systems for Plasma
Confinement (OS2018)
N. Asakura and the Joint Special Design Team for Fusion DEMO, “Recent progress of the DEMO divertor design in Japan, and physics and engineering issues” (invited)
30th Symposium on Fusion Technology (SOFT2018)
N. Asakura, K. Hoshino, H. Utoh, S. Tokunaga, K. Tobita, N. Ohno, and Joint Special Team for DEMO Design, “Studies of Advanced Divertor Concepts and Engineering Design Issues for Application to a Fusion Power DEMO Reactor”
H. Utoh, S. Kakudate, R. Hiwatari, Y. Someya, Y. Sakamoto, N.Asakura, S. Tokunaga, K. Tobita, Joint Special Design Team for Fusion Demo, “Conceptual design of remote maintenance and in-vessel components on Fusion DEMO reactor”
Y. Someya, H. Kudo, K. Tobita, R. Hiwatari, Y. Sakamoto and Joint Special Design Team for Fusion DEMO, “Development of a water-cooled blanket concept with pressure tightness against in-box LOCA for Japan’s DEMO”
T. Chikada, K. Kimura, J. Mochizuki, S. Horikoshi, M. Matsunaga,H. Fujita, K. Okitsu, T. Tanaka, Y. Hishinuma, Y. Sakamoto, Y. Someya, H. Nakamura, “Surface oxidation effect on deuterium permeation in reduced activation ferritic steel F82H for DEMO application”
K. Kimura, J. Mochizuki, S. Horikoshi, M. Matsunaga, H. Fujita, K. Okitsu, Y. Sakamoto, Y. Someya, H. Nakamura and T. Chikada, “Deuterium permeation behavior through reduced activation ferritic steel F82H”
27th IAEA Fusion Energy Conference (FEC-2018)
Y. Sakamoto and the Joint Special Design Team for Fusion DEMO, “Development of physics and engineering designs for Japan’s DEMO concept”
K. Gi, F. Sano, K. Akimoto, R. Hiwatari K. Tobita, “Contribution of fusion energy to low-carbon development under the Paris Agreement an accompanying uncertainties”
23rd Topical Meeting on the Technology of Fusion Energy (TOFE)
K. Tobita, R. Hiwatari, Y. Sakamoto, Y. Someya, N. Asakura, H. Utoh, Y. Miyoshi, Y. Homma, the Joint Special Design Team for Fusion DEMO, “Japan's efforts to develop DEMO concept during the past decade”
International Symposium of Superconductivity (ISS-2018)
K. Tobita, H. Utoh, R. Hiwatari, Y. Miyoshi, S. Tokunaga, Y. Sakamoto, Y. Someya, N. Asakura, Y. Homma, N. Nakajima, the Joint Special Design Team for Fusion DEMO, “Conceptual design of Japan’s fusion DEMO reactor JA DEMO with emphasis on superconducting magnet issues”
2017年
ISFNT-13
K. Tobita, “Overview of DEMO conceptual design and relevant R&D activities in Japan” (key note)
R.Hiwatari, A.Aokia, K.Katayama, Y.Kawamura, H.Kudo, S.Masuzaki, Y.Someya, H.Utoh, K.Watanabe, Y.Sakamoto, K.Tobita and Joint Special Design Team for Fusion DEMO, “Operation Plan of Japan’s DEMO toward Steady Electric Power Generation and Prospect of Commercialization” (invited)
Youji Someya, Kenji Tobita, Ryoji Hiwatari, Yoshiteru Sakamoto and Joint Special Design Team for Fusion DEMO, “Fusion DMEO reactor design based on nuclear analysis”, (invited)
Nobuyuki Asakura, Kazuo Hoshino, Hiroyasu Utoh, Yoji Someya, Satoshi Suzuki, Christian Bachmann, Holger Reimerdes, Hironobu Kudo, Shinsuke Tokunaga, Yuki Homma, Yoshiteru Sakamoto, Ryoji Hiwatari, Ronald Wenninger, Kenji Tobita, Gianfranco Federici, Koichiro Ezato, Yohji Seki, Noriyasu Ohno, Yoshio Ueda, “Plasma Exhaust and Divertor Studies in JA and EU Broader Approach, DEMO Design Activity”
Hiroyasu Utoh, Shinsuke Tokunaga, Nobuyuki Asakura, Yoshiteru Sakamoto, Yoji Someya, Ryoji Hiwatari, Kenji Tobita, Gianfranco Federici, Ronald Wenninger, Francesco Maviglia, “Studies of the Plasma Vertical Instability and its Control Concepts in JA and EU Broader Approach, DEMO Design Activity”
Yuya Miyoshi, Akira Aoki, Ryoji Hiwatari, Yoshiteru Sakamoto, Kenji Tobita, The Joint Special Design Team for DEMO, “Development of a plant system concept for a water-cooled fusion DEMO plant”
Makoto -M. Nakamura, Jae-Hwan Kim, Masaru Nakamichi, Youji Someya, Kenji Tobita, Yoshiteru Sakamoto and Joint Special Design Team for Fusion Demo, “Modeling of chemical reactions of beryllium/beryllide pebbles with steamand its application to safety design of water-cooled DEMO”
The 16th Plasma Edge Theory workshop
Y. Homma, K. Hoshino, S. Tokunaga, S. Yamoto, A. Hatayama, N. Asakura, Y. Sakamoto, K. Tobita, The Joint Special Design Team for Fusion DEMO, “An extended kinetic model for the thermal force on impurity particles in weakly collisional plasmas”
13th International Workshop on Beryllium Technology (BeWS-13)
N. Asakura, “Broader Approach (BA) R&D research status of the JET-ILW divertor tile and dust in Rokkasho: Be deposition study” (invited)
M.M. Nakamura, J.H. Kim, M. Nakamichi, Y. Someya, K. Tobita, Y. Sakamoto, Joint Special Design Team for Fusion Demo, “Modeling study of thermal excursion of chemical reactions of beryllium/beryllide pebbles with steam and its implication to fusion DEMO safety”
2nd International Workshop on Environmental, Safety and Economic Aspects of Fusion Power
Y. Sakamoto, “ESEFP design activities in Japan” (invited)
The 8th International Symposium of Advanced Energy Science - Interdisciplinary Approach to Zero-Emission Energy
R. Hiwatari, Joint Special Design Team, “Go forward to fusion electric generation - Status of Japan's DEMO conceptual design activity” (invited)
AEA TM on Divertor
N. Asakura, K. Hoshino, H. Utoh, Y. Someya, S. Suzuki, H. Kudo, S. Tokunaga, Y. Homma, Y. Sakamoto, R.Hiwatari, K. Tobita, K. Ezato, Y. Seki, N. Ohno, Y. Ueda, and Joint Special Team for Demo Design, “Studies of Plasma Exhaust Scenario and Divertor Design for JA DEMO”
The 18th International conference on Fusion Reactor Materials
Youji Someya, Kenji Tobita, Makoto Nakamura, Ryoji Hiwatari, Yoshiteru Sakamoto and Joint Special Design Team for Fusion DEMO, “Study on impurities in beryllides as neutron multiplier in DEMO blanket for shallow land disposal”
2016年
22nd PSI (2016/5/29 - 6/4)
N. Asakura,K. Hoshino, S.Tokunaga, K. Shimizu, H. Utoh, H. Kudo, K. Tobita, N. Ohno, and Joint Special Design Team for Fusion DEMO, “Simulation Studies of the Divertor Geometry and Plasma Parameters for 1.5 GW Fusion Power Demo Reactor”
S. Tokunaga, K. Hoshino,N. Asakura, K. Shimizu, Y. Sakamoto, Y. Homma, and Joint Special Design Team for Fusion DEMO, “Neutral-neutral elastic scattering effect on 2D structure of full-detached divertor in DEMO”
Y. Homma, K. Hoshino, S. Yamoto, N. Asakura, S. Tokunaga, A. Hatayama, Y. Sakamoto, R. Hiwatari, K. Tobita, Joint Special Design Team for Fusion Demo, “Numerical analysis of tungsten erosion and deposition processes under a DEMO divertor plasma and geometry”
TOFE2016 (2016/8)
K. Tobita for Joint Special Design Team for Fusion Demo, “Japanese Activity for DEMO Development and Its Prospects”
29th Symposium on Fusion Technology (2016/9/5 - 9)
Y. Sakamoto, H. Utoh, H. Takase, K. Hoshino, N. Asakura, T. Wakatsuki, S. Tokunaga, Y. Homma, N. Aiba, A. Matsuyama, N. Hayashi, S. Ide, K. Tobita and Joint Special Design Team for Fusion DEMO, “Progress of DEMO physics design study in Japan”
Y. Someya, H. Utoh, R. Hiwatari, H. Tanigawa, K. Tobita and Joint Special Desing Team for Fusion DEMO, “Shutdown dose rate assessment during replacement of in-vessel components for a fusion DEMO reactor”
H. Utoh, R. Hiwatari, K. Tobita, Y. Someya, Y. Sakamoto, N. Asakura, S. Tokunaga, A. Aoki, and Joint Special Design Team for Fusion DEMO, “Technological assessment between vertical and horizontal remote maintenance schemes for DEMO reactor”
S. Tokunaga, A. Matsuyama, Y. Someya, H. Utoh, Y. Sakamoto, N. Asakura, K. Tobita and Joint Special Design Team for Fusion DEMO, “Conceptual design study of pellet fuelling system for DEMO”
Y. Miyoshi, N. Asakura, K. Hoshino, H. Takase, R. Hiwatari, Y. Someya, Y. Sakamoto, K. Tobita, Joint Special Design Team for Fusion DEMO, “Profile analysis of the first wall heat load required for DEMO blanket concept”
IAEA2016 (2016/10/17 - 22)
N. Asakura, K. Hoshino, H. Utoh, Y. Someya, S. Tokunaga, S. Suzuki, K. Ezato, Y. Seki, H. Kudou, K. Shimizu, Y. Sakamoto, R. Hiwatari, K. Tobita, N. Ohno, Y. Ueda and Joint Special Team for Demo Design, “Physics and Engineering Design Studies on Power Exhaust and Divertor for a 1.5 GW Fusion Power DEMO”
R. Hiwatari et al., “Progress of conceptual design study on Japanese DEMO”
Y. Someya, M. Nakamura, A. Masui, K. Watanabe, H. Tanigawa1, K. Tobita and Joint Special Design Team for Fusion DEMO, “Safety and Waste Management Studies as Design Feedback for a Fusion DEMO Reactor in Japan”
4th IAEA DEMO Programme Workshop (2016/11/15 - 18)
K. Tobita, “Japan-Wide Activities toward DEMO”, (invited)
Y. Sakamoto, K. Tobita, N. Asakura, R. Hiwatari, Y. Someya, H. Utoh, S. Tokunaga, Y. Homma, N. Hayashi, S. Ide, Joint special design team for DEMO, “Physics Approach to Forecasting DEMO Plasma”
Y. Someya, K. Katayama, K. Watanabe, K. Tobita and Joint Special Design Team for Fusion DEMO, “Tritium issues from the perspective of DEMO system design”
TRITIUM2016
K. Katayama, Y. Someya, K. Tobita, H. Nakamura, H. Tanigawa, M. Nakamura, N. Asakura, K. Hoshino, T. Chikada, Y. Hatano, S. Fukada, “Estimation of Tritium Permeation Rate to Cooling Water in Fusion DEMO Condition”
