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Katsuoka, Nanako; Akiyama, Daisuke*; Kirishima, Akira*; Nagai, Takayuki; Okamoto, Yoshihiro; Sato, Nobuaki*
2023-Nendo "Busshitsu, Debaisu Ryoiki Kyodo Kenkyu Kyoten" Kenkyu Seika, Katsudo Hokokusho (Internet), 1 Pages, 2024/07
no abstracts in English
Nagai, Takayuki; Katsuoka, Nanako; Okamoto, Yoshihiro; Baba, Yuji*; Akiyama, Daisuke*
Photon Factory Activity Report 2023 (Internet), 3 Pages, 2024/00
no abstracts in English
Nagai, Takayuki; Akiyama, Daisuke*; Kirishima, Akira*; Katsuoka, Nanako; Okamoto, Yoshihiro; Sato, Nobuaki*
2022-Nendo "Busshitsu, Debaisu Ryoiki Kyodo Kenkyu Kyoten" Kenkyu Seika, Katsudo Hokokusho (Internet), 1 Pages, 2023/09
no abstracts in English
Nagai, Takayuki; Tone, Masaya; Katsuoka, Nanako; Okamoto, Yoshihiro; Baba, Yuji*; Akiyama, Daisuke*
Photon Factory Activity Report 2022 (Internet), 3 Pages, 2023/00
no abstracts in English
Katsuoka, Nanako; Nagai, Takayuki; Okamoto, Yoshihiro; Inose, Takehiko*; Akiyama, Daisuke*; Kirishima, Akira*; Sato, Nobuaki*
no journal, ,
no abstracts in English
Nagai, Takayuki; Katsuoka, Nanako; Okamoto, Yoshihiro; Akiyama, Daisuke*; Kirishima, Akira*
no journal, ,
Zirconium molybdate, sodium nitrate, strontium nitrate, and barium nitrate were added to the glass raw material and heated. After heating, the sample was analyzed by using XAFS measurement to investigate the formation mechanism of molybdates, which is the main component of the yellow phase in the vitrification process.
Nagai, Takayuki; Maeda, Yuta; Katsuoka, Nanako; Okamoto, Yoshihiro; Baba, Yuji*; Akiyama, Daisuke*
no journal, ,
no abstracts in English
Aoyama, Yusuke; Tone, Masaya; Shiramizu, Daiki; Katsuoka, Nanako; Miyata, Koshi; Fukuda, Shigeki; Otaka, Hikaru; Kobayashi, Hidekazu; Kodaka, Akira
no journal, ,
In the new glass melter (the 3rd melter) at the Tokai Vitrification Facility (TVF), the bottom shape of the melter was changed from the square pyramid of the existing melter (the 2nd melter) to a cone to improve ability to discharge platinum group elements. To confirm the effect of the improvement, operational test using non-radioactive simulant of liquid waste containing platinum group elements was carried out. Discharging behavior of platinum group elements was evaluated in comparison with the 2nd melter.
Tone, Masaya; Shiramizu, Daiki; Katsuoka, Nanako; Aoyama, Yusuke; Miyata, Koshi; Fukuda, Shigeki; Otaka, Hikaru; Kobayashi, Hidekazu; Kodaka, Akira
no journal, ,
The replacement of existing 2nd glass melter with the 3rd glass melter is scheduled from 2025 to 2026 in Tokai Vitrification Facility, TVF. The bottom shape of 3rd melter was changed from the square pyramid of 2nd melter to a cone to improve ability to discharge platinum group elements. Therefore, it is necessary to confirm operational parameters appropriate for the 3rd melter with cone shaped bottom. Operational test using non-radioactive simulant of liquid waste was carried out to ensure the appropriate operational parameters that accommodate key control values such as glass temperature.
Katsuoka, Nanako; Nagai, Takayuki; Okamoto, Yoshihiro; Akiyama, Daisuke*; Sato, Nobuaki*; Kirishima, Akira*
no journal, ,
no abstracts in English
Okamoto, Yoshihiro; Nagai, Takayuki; Katsuoka, Nanako; Akiyama, Daisuke*; Kirishima, Akira*
no journal, ,
no abstracts in English
Okamoto, Yoshihiro; Nagai, Takayuki; Katsuoka, Nanako; Akiyama, Daisuke*; Kirishima, Akira*
no journal, ,
XAFS analysis of heat-treated samples under various conditions using zirconium molybdate as starting material was performed to compare the formation of calcium molybdate. It was found that zirconium molybdate decomposes by heat treatment at 1073K to form zirconium oxide, but the zirconium immediately dissolves into the glass. On the other hand, after decomposition, the molybdenum continued to maintain the form of molybdate ions, eventually becoming calcium molybdate. However, it was found that calcium molybdate was formed at a lower temperature in the latter case when sodium was present in the raw glass from the beginning or when it was supplied as sodium nitrate without being included in the raw glass.
Katsuoka, Nanako; Nagai, Takayuki; Okamoto, Yoshihiro; Akiyama, Daisuke*; Kirishima, Akira*; Sato, Nobuaki*
no journal, ,
no abstracts in English
Katsuoka, Nanako
no journal, ,
no abstracts in English
