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Journal Articles

Mesospheric ionization during substorm growth phase

Murase, Kiyoka*; Kataoka, Ryuho*; Nishiyama, Takanori*; Nishimura, Koji*; Hashimoto, Taishi*; Tanaka, Yoshimasa*; Kadokura, Akira*; Tomikawa, Yoshihiro*; Tsutsumi, Masaki*; Ogawa, Yasunobu*; et al.

Journal of Space Weather and Space Climate (Internet), 12, p.18_1 - 18_16, 2022/06

 Times Cited Count:0 Percentile:0.01(Astronomy & Astrophysics)

We identified two energetic electron precipitation (EEP) events during the growth phase of moderate substorms and estimated the mesospheric ionization rate for an EEP event for which the most comprehensive dataset from ground-based and space-born instruments was available. The mesospheric ionization signature reached below 70 km altitude and continued for ~15 min until the substorm onset, as observed by the PANSY radar and imaging riometer at Syowa Station in the Antarctic region. We also used energetic electron flux observed by the Arase and POES 15 satellites as the input for the air-shower simulation code PHITS to quantitatively estimate the mesospheric ionization rate. Combining the cutting-edge observations and simulations, we shed new light on the space weather impact of the EEP events during geomagnetically quiet times, which is important to understand the possible link between the space environment and climate.

Journal Articles

Frontline of R&D for decommissioning and waste disposal, 1; R&D for processing and disposal of low-level radioactive waste and closure of uranium mine

Tsuji, Tomoyuki; Sugitsue, Noritake; Sato, Fuminori; Matsushima, Ryotatsu; Kataoka, Shoji; Okada, Shota; Sasaki, Toshiki; Inoue, Junya

Nihon Genshiryoku Gakkai-Shi ATOMO$$Sigma$$, 62(11), p.658 - 663, 2020/11

no abstracts in English

Journal Articles

The Summary report on engineering design activities in the International Thermonuclear Experimental Reactor (ITER) project

Mori, Masahiro; Shoji, Teruaki; Araki, Masanori; Saito, Keiji*; Senda, Ikuo; Omori, Junji*; Sato, Shinichi*; Inoue, Takashi; Ono, Isamu*; Kataoka, Takahiro*; et al.

Nihon Genshiryoku Gakkai-Shi, 44(1), p.16 - 89, 2002/01

no abstracts in English

Journal Articles

ITER engineering design

Shimomura, Yasuo; Tsunematsu, Toshihide; Yamamoto, Shin; Maruyama, So; Mizoguchi, Tadanori*; Takahashi, Yoshikazu; Yoshida, Kiyoshi; Kitamura, Kazunori*; Ioki, Kimihiro*; Inoue, Takashi; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 78(Suppl.), 224 Pages, 2002/01

no abstracts in English

Oral presentation

Development of treatment for low radioactive waste in Tokai Reprocessing Plant, 22; Hydrogen generation evaluation of cement solidified by gamma irradiation

Kataoka, Shoji; Takano, Masato; Sato, Fuminori; Saito, Yasuo

no journal, , 

no abstracts in English

Oral presentation

Study on hydrogen generation from cement solidified products of low radioactive effluent

Sato, Fuminori; Kataoka, Shoji; Matsushima, Ryotatsu; Terunuma, Tomomi

no journal, , 

no abstracts in English

Oral presentation

Development of treatment for low radioactive waste in Tokai Reprocessing Plant, 26-3; Study on cement solidification of carbonate waste liquid in actual scale kneading

Kataoka, Shoji; Matsushima, Ryotatsu; Sato, Fuminori; Terunuma, Tomomi

no journal, , 

The Low-Level Radioactive Waste Treatment Technology Development Facility (LWTF) of Tokai Reprocessing Facility has been constructed as a facility for processing low radioactive liquid waste and solid waste generated from the reprocessing facility, and cold tests are being conducted. In this facility, the nitrate waste liquid generated by the treatment of liquid waste was decided to be solidified using borate, but now it is planned to replace it with carbonate waste liquid and then make it cement solid. Therefore, we are proceeding with examination and design for the introduction of equipment. In this report, we conduct a cement kneading and solidification test on a carbonate waste liquid on a real scale (200L drum), and report on the results of examining the influence of the cement solidified body over time and the strength when the waste liquid composition changes.

Oral presentation

Development of treatment for low radioactive waste in Tokai Reprocessing Plant, 27; Study on Cs and Sr adsorption process in LWTF

Kataoka, Shoji; Takano, Masato; Nagayama, Mineo; Kano, Yoshiharu*; Suzuki, Tatsuya*; Miyabe, Shinsuke*; Sakuma, Takashi*; Shirozu, Hidetomo

no journal, , 

no abstracts in English

Oral presentation

Development of treatment for low radioactive waste in Tokai Reprocessing Plant, 29-2; Hydrogen generation evaluation of cement solidified by gamma irradiation

Sato, Fuminori; Kataoka, Shoji; Matsushima, Ryotatsu; Otake, Katsumi*; Shirozu, Hidetomo

no journal, , 

no abstracts in English

Oral presentation

Study on hydrogen generation from cement solidified products of low radioactive effluent

Sato, Fuminori; Kataoka, Shoji; Matsushima, Ryotatsu; Otake, Katsumi*; Shirozu, Hidetomo

no journal, , 

no abstracts in English

Oral presentation

Development of treatment for low radioactive waste in Tokai Reprocessing Plant, 30; Analysis study on Cs and Sr adsorption process in LWTF

Sato, Fuminori; Kataoka, Shoji; Suzuki, Tatsuya*; Miyabe, Shinsuke*; Sakuma, Takashi*; Shirozu, Hidetomo

no journal, , 

Cs and Sr adsorbents used in LWTF is studied. In this report results of the Cs and Sr adsorption tests were analyzed and examined for application to LWTF.

11 (Records 1-11 displayed on this page)
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