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Amamoto, Ippei; Mitamura, Naoki*; Tsuzuki, Tatsuya*; Takasaki, Yasushi*; Shibayama, Atsushi*; Yano, Tetsuji*; Nakada, Masami; Okamoto, Yoshihiro
Proceedings of 13th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM 2010) (CD-ROM), p.503 - 508, 2010/10
The main objective of this development is to recycle the purified eutectic medium of the pyroreprocessing, delaying its disposal for as long as possible. We have introduced the simple filtration method to remove the rare earth element (REE) particles which were formed due to the conversion of REE chlorides to phosphates. Here, the iron phosphate glass is used as a filtration medium for the removal of FP particles. However, some soluble FP such as compounds of alkali-metals, alkaline-earth metals, etc. still remain in the eutectic medium. This time around, on an experimental basis, the iron phosphate glass has been used as a sorbent instead, to remove the soluble FP. We have obtained some positive results and have intention to incorporate it into the spent electrolyte recycle process as a part of the FP separation and immobilization system.
Ishii, Keiichi*; Shinohara, Koji; Ishikawa, Masao; Baba, Mamoru*; Isobe, Mitsutaka*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*
Review of Scientific Instruments, 81(10), p.10D334_1 - 10D334_3, 2010/10
Times Cited Count:6 Percentile:31.03(Instruments & Instrumentation)Okada, Koichi*; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Okamoto, Atsushi*; Kobuchi, Takashi*; Kitajima, Sumio*; Sasao, Mamiko*
Journal of Plasma and Fusion Research SERIES, Vol.8, p.666 - 669, 2009/09
Measurement of fuel ion density ratio, /, is required for burning control on ITER. The measured / ratio must be fed back in real time. A neutron measurement system to measure / should be operable at high counting rate. It is estimated that the number of emitted DT neutrons is 200 times higher than that of DD neutrons under the condition of ITER standard operation. A neutron measurement system was developed using a DT/DD generator, where DT neutrons are dominant and DD neutrons are contaminated slightly in the neutron beam. The measurement instrument was a TOF spectrometer. Signals originating from each neutron must be distinguished in order to measure the fuel ratio. We developed a circuit system with discrimination windows to distinguish each signal pulse, and DT and DD neutrons were measured separately and simultaneously with this system. The experimental result indicates a possibility that this system is suitable for measurement of fuel ion density ratio on ITER.
Kasugai, Atsushi; Tsuneoka, Masaki; Sakamoto, Keishi; Maebara, Sunao; Imai, Tsuyoshi; Nagashima, Takashi; Kariya, Tsuyoshi*; *; *; Hayashi, Kenichi*; et al.
JAERI-Research 95-041, 18 Pages, 1995/06
no abstracts in English
Kasugai, Atsushi; Sakamoto, Keishi; Tsuneoka, Masaki; Maebara, Sunao; Nagashima, Takashi; Imai, Tsuyoshi; Kariya, Tsuyoshi*; *; *; *; et al.
Fusion Engineering and Design, 26, p.281 - 286, 1995/00
Times Cited Count:7 Percentile:59.2(Nuclear Science & Technology)no abstracts in English
Yoshida, Hiroshi; *; Terai, Takayuki*; Odawara, Osamu*; *; *
JAERI-M 92-100, 97 Pages, 1992/07
no abstracts in English
Sakamoto, Keishi; Tsuneoka, Masaki; Maebara, Sunao; Kasugai, Atsushi; Fujita, Hideo*; *; Yamamoto, Takumi; Nagashima, Takashi; Kariya, Tsuyoshi*; *; et al.
Proceedings of the 17th International Conference on Infrared and Millimeter Waves, p.188 - 189, 1992/00
no abstracts in English
Okada, Koichi; Kondo, Keitaro; Sato, Satoshi; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Iwasaki, Tomohiko*; Kitajima, Sumio*; Sasao, Mamiko*
no journal, ,
no abstracts in English
Okada, Koichi; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Nishitani, Takeo; Nomura, Ken*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*
no journal, ,
no abstracts in English
Okada, Koichi*; Kondo, Keitaro; Ochiai, Kentaro; Sato, Satoshi; Konno, Chikara; Okamoto, Atsushi*; Kobuchi, Takashi*; Kitajima, Sumio*; Sasao, Mamiko*
no journal, ,
no abstracts in English
Ishii, Keiichi*; Shinohara, Koji; Takakura, Kosuke; Ochiai, Kentaro; Isobe, Mitsutaka*; Baba, Mamoru*; Kashiwa, Soichiro*; Okamoto, Atsushi*; Kitajima, Sumio*; Sasao, Mamiko*
no journal, ,
no abstracts in English
Suzuki, Shinichi; Akutsu, Kazuhiro; Yaita, Tsuyoshi; Okamoto, Yoshihiro; Ogata, Tsuyoshi*; Takeshita, Kenji*; Inaba, Yusuke*; Ikeda, Atsushi; Kobayashi, Toru; Oaki, Hiroshi*; et al.
no journal, ,
no abstracts in English
Shimizu, Yusuke*; Fujita, Takaaki*; Okamoto, Atsushi*; Arimoto, Hideki*; Hayashi, Nobuhiko; Hoshino, Kazuo; Nakano, Tomohide; Honda, Mitsuru
no journal, ,
no abstracts in English
Okamoto, Yoshihiro; Masuno, Atsunobu*; Owaku, Kohei*; Tsukada, Takeshi*; Kanehira, Norio*
no journal, ,
In the development of vitrification technology for high burnup fuel and MOX fuel, tests using various compositions of raw glass materials were conducted to find the optimum composition. The Si/B ratio and the amount of alkali in the raw glass, and even the loading ratio of waste components were varied. In this study, we summarize the composition dependence obtained by structural analysis of those samples.