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Machida, Masahiko; Yamada, Susumu; Kim, M.; Okumura, Masahiko; Miyamura, Hiroko; Shikaze, Yoshiaki; Sato, Tomoki*; Numata, Yoshiaki*; Tobita, Yasuhiro*; Yamaguchi, Takashi; et al.
RIST News, (69), p.2 - 18, 2023/09
The contamination of radioactive materials leaked from the reactor has resulted in numerous hot spots in the Fukushima Daiichi Nuclear Power Station (1F) building, posing obstacles to its decommissioning. In order to solve this problem, JAEA has conducted research and development of the digital technique for inverse estimation of radiation source distribution and countermeasures against the estimated source in virtual space for two years from 2021 based on the subsidy program "Project of Decommissioning and Contaminated Water Management" performed by the funds from the Ministry of Economy, Trade and Industry. In this article, we introduce the results of the project and the plan of the renewal project started in April 2023. For the former project, we report the derivative method for LASSO method considering the complex structure inside the building and the character of the source and show the result of the inverse estimation using the method in the real reactor building. Moreover, we explain the platform software "3D-ADRES-Indoor" which integrates these achievements. Finally, we introduce the plan of the latter project.
Kawamata, Yoichi; Naito, Osamu; Kiyono, Kimihiro; Itami, Kiyoshi; Totsuka, Toshiyuki; Akasaka, Hiromi; Sueoka, Michiharu; Sato, Tomoki; Oshima, Takayuki; Sakata, Shinya; et al.
Fusion Engineering and Design, 83(2-3), p.198 - 201, 2008/04
Times Cited Count：3 Percentile：23.55(Nuclear Science & Technology)The design activity of JT-60SA (JT-60 Super Advanced) which is remodeled to a superconducting tokamak device has been starting under the JA-EU collaborative ITER-BA project. For the JT-60SA control system, the existing system should be reused as much as possible from the viewpoint of cost-effectiveness. We have just begun to discuss the configuration of the advanced Supervisory Control System (SVCS) including the following systems: (1) ultimately flexible real-time control system, (2) precise timing system enough to clarify cause and effect, and (3) safety shutdown control system. In this report, we present the design study of the JT-60SA SVCS with focusing on these systems.
Akasaka, Hiromi; Takano, Shoji; Sato, Tomoki; Kawamata, Yoichi
Heisei-18-Nendo Nagoya Daigaku Sogo Gijutsu Kenkyukai Kairo, Keisoku, Seigyo Gijutsu Kenkyukai Hokokushu, p.106 - 109, 2007/03
no abstracts in English
Yamada, Susumu; Numata, Yoshiaki*; Sato, Tomoki*; Tobita, Yasuhiro*; Wei, S.*
no journal, ,
no abstracts in English
Miyamura, Hiroko; Sato, Tomoki*; Numata, Yoshiaki*; Tobita, Yasuhiro*; Machida, Masahiko
no journal, ,
We develop interactive visualization engine on a mixed reality device to realize workers' safety and work efficiency during environmental improvement work under the high-dose radiation environment. After the inverse source estimation, the three-dimensional distribution maps of the air dose rate are obtained by simulation. It is necessary to present the maps to decommissioning workers by visualization techniques to help them understand their environment. The latest MR devices can be used to support the work of decommissioning workers by placing virtual visualization primitives in the real space. In this presentation, we report outline the results and future direction of the MR device visualization engine, including features such as immersive experience, interactive operation, and information sharing with remote specialists.
Machida, Masahiko; Shi, W.*; Yamada, Susumu; Miyamura, Hiroko; Numata, Yoshiaki*; Sato, Tomoki*; Tobita, Yasuhiro*; Yoshida, Toru*; Yanagi, Hideaki*; Furutachi, Naoya*; et al.
no journal, ,
no abstracts in English
Miyamura, Hiroko; Sato, Tomoki*; Numata, Yoshiaki*; Tobita, Yasuhiro*; Iwata, Ayako*; Machida, Masahiko
no journal, ,
We propose a prototype of a decommissioning support system using an XR device, considering the system is effective for realizing the safety for the decommissioning workers the efficiency of the work. In this paper, we report the outline of the new function as we have added it with the use of Avatar in cyberspace for evaluating the exposure dose of the decommissioning workers. This function allows to create the work plan which is taken into account the worker's exposure dose rate.
