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Tazaki, Makiko
Nihon Genshiryoku Gakkai-Shi ATOMO
, 65(3), p.183 - 186, 2023/03
no abstracts in English
Sakai, Akihiro; Kamei, Gento; Sakamoto, Yoshiaki
Nihon Genshiryoku Gakkai-Shi ATOMO, 65(1), p.25 - 29, 2023/01
Currently, radioactive waste generated from research institutes, etc. is keeping in storage facilities without being disposed of. In order to solve this problem, the Japan Atomic Energy Agency (JAEA) is proceeding with the project for concrete-pit disposal and trench disposal of these waste. This paper introduces the characteristics of the waste and disposal facilities planned by the JAEA, as well as the status of development of the siting criteria for the disposal facility.
Inagaki, Satomi; Hayakawa, Misa
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(12), p.686 - 690, 2022/12
no abstracts in English
Mineo, Hideaki
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(11), p.617 - 621, 2022/11
In December 2016 Decisions were made by the Government on the Fast Breeder Prototype Reactor "Monju", which were decommissioning of the reactor and installation of a new research reactor at the Monju site. After the decisions, MEXT started research to list reactor candidates suitable for the site. Among the candidates, medium power reactor type of which thermal output less than 10,000 kW was chosen to utilize neutron beams. Then, from 2020, MEXT launched an entrusted business and adopted JAEA, Kyoto University and University of Fukui as the core institutions of the business to carry out the conceptual design. This paper describes the system to proceed the conceptual design and to examine the utilization management of the new research reactor and also shows their status.
Tamai, Hiroshi
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(8), p.465 - 467, 2022/08
Though nuclear safety and nuclear security share the same goal of protecting the public and the environment from the harmful effects of ionizing radiation, their response actions may have differences, especially during transport, where protection could be vulnerable. The interface between them is a major issue. In December 2021, with the aim of complementarily strengthening nuclear safety and nuclear security in the transportation of radioactive materials IAEA published a related technical report and held an international conference. The outline of the technical report and the international conference is introduced.
Yoshizawa, Michio
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(8), p.439 - 441, 2022/08
no abstracts in English
Fukahori, Tokio; Nakayama, Shinsuke; Katabuchi, Tatsuya*; Shigyo, Nobuhiro*
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(7), p.413 - 414, 2022/07
The Investigation Advisory Committee on Nuclear Data monitors global nuclear research and development trends, and conducts collaborative nuclear data activities with domestic and foreign academic institutions in a wide range of fields. The aims are to contact, to exchange information, and to build an interdisciplinary cooperation system. Reported are the activities on the request list site, human resources development, and roadmap creation regarding nuclear data directly related to future nuclear data research activities, among the main activities in the 2019-2020 period.
Tachi, Yukio; Saito, Takumi*; Kirishima, Akira*
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(5), p.290 - 295, 2022/05
no abstracts in English
Motoshima, Takayuki*; Matsui, Hiroya; Kawakubo, Masahiro*; Kobayashi, Masato*; Ichimura, Tetsuhiro*; Sugita, Yutaka
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(3), p.163 - 167, 2022/03
no abstracts in English
Watanabe, Tomohiko*; Idomura, Yasuhiro; Todo, Yasushi*; Honda, Mitsuru*
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(3), p.152 - 156, 2022/03
Understanding of physical processes of particle, momentum, and thermal transports is essential for predicting the confinement performance of burning plasmas in ITER, which is targeting the scientific demonstration of magnetic confinement fusion. First principles based simulations on Fugaku disclosed physical mechanisms such as complex transport processes of multi-scale turbulence in deuterium-tritium plasmas and kinetic effects in energetic particle transport due to electromagnetic fluctuations. We promote further research and development of first principles based simulations towards the performance prediction of burning plasmas.
Yamamoto, Yoichi*; Ogawa, Yusuke*; Kobayashi, Masato*; Takayama, Yusuke; Nishimoto, Soshi*
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(2), p.105 - 109, 2022/02
no abstracts in English
Yamano, Hidemasa; Inaba, Yoshitomo
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(2), p.74 - 78, 2022/02
This report mainly introduces trends in innovative reactor development related to nuclear innovation toward 2050 carbon neutral in Japan in addition to introducing overseas development trends for major developing countries.
Kaneko, Masashi
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(1), p.30 - 34, 2022/01
Partitioning of minor actinides from rare earths is one of the most important techniques to develop group separation of high-level radioactive liquid waste. In this issue, the results of prediction of separation performance between minor actinides and rare earths observed in solvent extraction and the separation mechanism by means of using density functional theory are explained.
Torii, Tatsuo*; Sanada, Yukihisa; Sato, Yuki
Nihon Genshiryoku Gakkai-Shi ATOMO, 64(1), p.17 - 22, 2022/01
Ten years have passed since the accident at the Fukushima Daiichi Nuclear Power Station. Due to the accident, radioactive materials were widely diffused and deposited not only in the building and site of the Fukushima Daiichi Nuclear Power Station but also in the environment. Demand has increased, and the introduction and development of radiation imaging equipment called gamma cameras and mapping of radiation distribution in the environment have been promoted. Here, we will introduce the radiation distribution measurement technology that has been developed and operated after the accident, and describe the future prospects.
Okawa, Tomio*; Mori, Shoji*; Liu, W.*; Ose, Yasuo*; Yoshida, Hiroyuki; Ono, Ayako
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(12), p.820 - 824, 2021/12
The evaluation method of the critical heat flux based on the mechanism is needed for the efficient design and development of fuel in reactors and the appropriate safety evaluation. In this paper, the current researches relating to the mechanism of the critical heat flux are reviewed, and the issue to be considered in the future are discussed.
Narukawa, Takafumi
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(11), p.780 - 785, 2021/11
no abstracts in English
Hidaka, Akihide
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(9), p.679 - 680, 2021/09
no abstracts in English
Tamai, Hiroshi
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(9), p.677 - 678, 2021/09
The International Atomic Energy Agency, IAEA, has issued a technical report on national approaches to the interface between nuclear safety and nuclear security, which is essential for strengthening through mutual complementation. The report aims to provide Member States with insights on good practices, each of which is important in coordinating the interface. Those are states' experiences in (i) legal and regulatory framework, (ii) nuclear installations, (iii) radioactive sources and associated facilities and activities, (iv) management systems and nuclear safety and nuclear security culture, (v) emergency preparedness and response, and common issues in cross-cutting field.
Ueta, Shohei; Sasaki, Koei; Arita, Yuji*
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(8), p.615 - 620, 2021/08
no abstracts in English
Yasuda, Hiroshi*; Fumoto, Hiromichi*; Saito, Tatsuo
Nihon Genshiryoku Gakkai-Shi ATOMO, 63(8), p.610 - 614, 2021/08
Regarding the handling of uranium bearing waste, which is contaminated with uranium, which is a naturally occurring radionuclide, and its descendant nuclides, in recent years, the Japan Nuclear Regulatory Commission, etc. have been carefully and actively deliberated based on the knowledge of natural science and safety engineering. It was carried out, and as of March 2021, a certain policy has been shown. On the other hand, when disposing of uranium waste, which may cause dose exposure to future generations, the authors consider not only the science and engineering perspectives that have been conducted so far, but also the humanities and social science perspectives. We have been discussing with experts in related fields, thinking that it is necessary. In this report, we will introduce the background that brought about such an idea and the direction of future discussions.
