High-speed classification of coherent X-ray diffraction Patterns on the K computer for high-resolution single biomolecule imaging

Tokuhisa, Atsushi*; Arai, Junya*; Jochi, Yasumasa*; Ono, Yoshiyuki*; Kameyama, Toyohisa*; Yamamoto, Keiji*; Hatanaka, Masayuki*; Gerofi, B.*; Shimada, Akio*; Kurokawa, Motoyoshi*; et al.

Journal of Synchrotron Radiation, 20(6), p.899 - 904, 2013/11

https://doi.org/10.1107/S0909049513022152

Study on systemizing of technology for investigation and analysis of the deep underground geological environment; Japanese fiscal year, 2009 (Contract research)

Kojima, Keiji*; Onishi, Yuzo*; Watanabe, Kunio*; Nishigaki, Makoto*; Tosaka, Hiroyuki*; Shimada, Jun*; Aoki, Kenji*; Tochiyama, Osamu*; Yoshida, Hidekazu*; Ogata, Nobuhisa; et al.

JAEA-Research 2010-049, 282 Pages, 2011/02

JAEA-Research-2010-049.pdf:29.88MB

This report summarizes studies that have been carried out with the aim of assessing and systemizing the technology used for the investigation and analysis of the deep underground geological environment in relation to the disposal of radioactive waste. The main studies were: (1) a study on the research and development (R&D) topics proven to have practical application for the investigation, and analysis and understanding of the deep underground geological environment, and, (2) a study on leading edge technology that can provide the advanced technical basis for the investigation, analysis and understanding of the deep underground geological environment. Regarding the R&D topics (1, above), specific investigations, measurements, numerical analyses and chemical analyses were performed and reviewed with respect to the topics, (a) Repository design, engineering technology (b) Geological environment and (c) Safety evaluation. Based on the result of the review, topics requiring collaboration research in overlapping research fields, including safety assessment, were identified. Also, the near field concept (NFC) was reconsidered in terms of its realistic construction model. Regarding advanced technology (2, above), based on the objectives of the JAEA (Japan Atomic Energy Agency) research project, the study was implemented considering previous R&D results and detailed research result at the research site and thus an assessment of the need for advanced technical basis for investigation and analysis. This study contributed to the R&D development and its practical application.

Numerical study of the ripple resonance diffusion of alpha particles in tokamaks

Mimata, Hideyuki*; Tani, Keiji*; Tsutsui, Hiroaki*; Tobita, Kenji; Iio, Shunji*; Shimada, Ryuichi*

Plasma and Fusion Research (Internet), 4, p.008_1 - 008_8, 2009/04

https://doi.org/10.1585/pfr.4.008

The energy dependence of the diffusion coefficients of alpha particles in rippled magnetic fields of tokamaks are numerically investigated with an orbit following Monte Carlo code. The diffusion coefficients are enhanced around the ripple resonance energy while they are reduced and has a minimum near the resonance energy, and hence they have an M-shaped dependence on the energy. The ripple resonance is caused by a radial change of the toroidal precession of banana particles, and creates islands in the phase space related with the toroidal and poloidal angles. Since the particles outside the separatrix mainly contribute to the diffusion, the M-shaped energy dependence is explained by both island structure and initial distribution of particles in the phase space. Such a ripple resonant diffusion is dominant for fusion-produced alpha particles in the slowing down process.

Study on systemizing technology on the investigation and analysis of deep underground geological environment; Japanese fiscal year, 2006 (Contract research)

Kojima, Keiji*; Onishi, Yuzo*; Watanabe, Kunio*; Nishigaki, Makoto*; Tosaka, Hiroyuki*; Shimada, Jun*; Aoki, Kenji*; Tochiyama, Osamu*; Yoshida, Hidekazu*; Ogata, Nobuhisa; et al.

JAEA-Research 2008-042, 236 Pages, 2008/04

JAEA-Research-2008-042.pdf:23.43MB

The following study was done with the aim of systemizing the technology on the investigation and analysis to grasp deep underground geological environment in relation to the radioactive waste disposal. (1) The study on the research and development (R&D) subjects which turned to the practical investigation and analysis of deep underground geological environment. (2) The study on the advanced technical basis of the investigation and analysis of deep underground geological environment. It continued in the former year and got the following results. Concerning (1), the concrete investigation, measurements, numerical analyses and chemical analyses were enforced about the following item and extracted some subjects with the viewpoint of radioactive waste disposal. Concerning (2), the evaluation of the results and a way to the practical use were discussed on the R&D activities of the following item. The R&D activities of the study group concerning (2) are related to the fundamental and elemental technology. It was discussed if these results could be taken into the practical investigation programs which characterize the geological environment and engineering technology in the Tono Geoscience Center. The Study group also discussed and gave the comment on the 2nd phase (the shaft construction phase of the MIU (Mizunami Underground Research Laboratory) research program in the JAEA.

Study on systemizing the technology on the investigation and analysis of deep underground geological environment; Japanese fiscal year, 2006 (Contract research)

Kojima, Keiji*; Onishi, Yuzo*; Watanabe, Kunio*; Nishigaki, Makoto*; Tosaka, Hiroyuki*; Shimada, Jun*; Aoki, Kenji*; Tochiyama, Osamu*; Yoshida, Hidekazu*; Ogata, Nobuhisa; et al.

JAEA-Research 2007-060, 210 Pages, 2007/09

JAEA-Research-2007-060-1.pdf:43.82MB
JAEA-Research-2007-060-2.pdf:41.2MB
JAEA-Research-2007-060-3.pdf:6.42MB

The following study was done with the aim of systemizing the technology on the investigation and analysis to grasp deep underground geological environment in relation to the radioactive waste disposal. (1) The study on the research and development (R&D) subjects which turned to the practical investigation and analysis of deep underground geological environment. (2) The study on the advanced technical basis of the investigation and analysis of deep underground geological environment. It continued in the former year and got the following results. Concerning (1), the concrete investigation, measurements, numerical analyses and chemical analyses were enforced about the following item and extracted some subjects with the viewpoint of radioactive waste disposal. More over, the way to make the co-operative program among each field of the following (a), (b) and (c) was discussed. (a) The subjects extracted with the viewpoint of the repository design and engineering technology. (b) The subject extracted with the viewpoint of the safety assessment. (c) The subjects extracted with the viewpoint of the geological environment. The joint research subjects among each field of (a), (b), (c) were also discussed. Concerning (2), the evaluation of the results and a way to the practical use were discussed on the R&D activities. The Study group also discussed and gave the comment on the 2nd stage of the MIU (Mizunami Underground Research Laboratory) research program in the JAEA.

Study on Systemizing the Technology on the Investigation and Analysis of Deep Underground Geological Environment, 2005

Kojima, Keiji*; Onishi, Yuzo*; Watanabe, Kunio*; Nishigaki, Makoto*; Tosaka, Hiroyuki*; Shimada, Jun*; Aoki, Kenji*; Tochiyama, Osamu*; Yoshida, Eichi*

JNC TJ7400 2005-081, 337 Pages, 2005/02

JNC-TJ7400-2005-081.pdf:39.72MB

The following study was done in this year with the aim of syatemizing the technology on the investigation and analysis to grasp deep underground geological environment in relation to the radioactive waste disposal. The study to extract the research and development (R&D) subjects turned to the practical investigation and analysis of deep undergruound geological environment. The study on the advanced technical basis of the investigation and analysis of deep underground geological environment.

Study on Systemizing the Technology on the Investigation and Analysis of Deep Underground Geological Environment, 2003

Kojima, Keiji*; Onishi, Yuzo*; Watanabe, Kunio*; Nishigaki, Makoto*; Tosaka, Hiroyuki*; Shimada, Jun*; Aoki, Kenji*

JNC TJ7400 2004-008, 234 Pages, 2004/02

JNC-TJ7400-2004-008.pdf:11.02MB

The following was done in this year with the aim of systemizing the technology on the investigation and analysis to grasp deep underground geological environment in relation to the radioactive waste disposal. (1) The study to extract the research and development (R&D) subjects turned to the practical investigation and analysis of deep underground geological environment. (2) The study on the advanced technical basis of the investigation and analysis of deep underground geological environment. It continued in the former year and got the following results. Concerning (1), the concrete investigation, measurement and numerical / chemical analysis were enforced about the following item and extracted some subjects with the viewpoint of radioactive waste disposal. 1: The subjects extracted with the viewpoint of the repository design and engineering technology. *The evaluation technique of the excavation disturbed zone (EDZ) by acoustic emission (AE) or micro seismicity measurement. *Fracture sealing technique such as vibration grouting toward low permeable rock mass. 2: The subject extracted with the viewpoint of the safety assessment. *Precipitation of the metal hydroxide (non-crystallized) through migration process in rock mass and change to the crystallized oxide.3: The subjects extracted with the viewpoint of the geological environment. *Fracture distribution characteristics around the fault, it can think to meet in the underground facilities and the prediction of long term activities of the fault. *Natural sealing process by the secondary filling materials (iron oxide and carbonate etc.) in the fracture of rock mass and that influence which may be given to the long-term migration and release of nuclides. The advanced research subjects among the each field of 1, 2, 3 were also discussed. Concerning (2), the evaluation of the results and a way to the practical use were discussed on the R&D activities of the following item.

Report from special research group on lessons on radiation protection after Fukushima-Daiichi NPP Accident

Kosako, Toshiso*; Tani, Kotaro*; Ogino, Haruyuki*; Iida, Takao*; Hattori, Takatoshi*; Oda, Keiji*; Omi, Tadashi*; Furuta, Sadaaki*; Murakami, Hironori*; Kasai, Atsushi*; et al.

no journal, , 

Two proposal notes were written by the Japan Health Physics Society in terms of the issues on radiation protection considering the arguments in many academic symposiums after the accident in TEPCO Fukushima-Daiichi NPP resulting from the Great East Japan Earthquake of March 11, 2011. These proposal notes were referred in some symposiums, and the follow-up activities are needed for collecting the chronological information after the Fukushima accident and for considering these proposal matter in detail. After the proposal notes were published, quite many activities for radiation protection were performed. In this professional workshop, the chronological information was collected and easily evaluated concerning with the proposal. In this presentation, the outcome was introduced.