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Journal Articles

Remote maintenance technologies of equipment and analyzing apparatus in hot cell of Tokai Vitrification Facility, Tokai Reprocessing Plant

Aoya, Juri; Miyata, Katsuhiko*; Terakado, Akihito*; Otsuzumi, Yoji*; Kurosawa, Daiki*; Sunaba, Takanobu*; Oyama, Yuto*; Inada, Satoshi

Nihon Hozen Gakkai Dai-17-Kai Gakujutsu Koenkai Yoshishu, p.507 - 512, 2021/07

The high level radioactive liquid waste is analyzed for the vitrification process control and the vitrified waste quality in the hot cell of Tokai Vitrification Facility, Tokai Reprocessing Plant. There are 8 Master-slave manipulators, 7 lighting equipment, an electronic balance, and an inductively coupled plasma-optical emission spectrometer used for remote operation, securing visibility, total oxide analysis, and elemental analysis in the analytical hot cell. These equipment and analytical apparatus must be secured with the integrity all the time because the vitrification process cannot be proceeded without analysis of the high level radioactive liquid waste. We constructed the self-remote-maintenance technologies of these equipment and analytical apparatus which reduce the risks of radioactive contamination, radiation exposure, and injury of an operator and also were optimized with respect to a labor, time, and cost, based on the operation of approximately 20 years.

JAEA Reports

Synthesis report on the R&D for the Horonobe Underground Research Laboratory; Project carried out during fiscal years 2015-2019

Nakayama, Masashi; Saiga, Atsushi; Kimura, Shun; Mochizuki, Akihito; Aoyagi, Kazuhei; Ono, Hirokazu; Miyakawa, Kazuya; Takeda, Masaki; Hayano, Akira; Matsuoka, Toshiyuki; et al.

JAEA-Research 2019-013, 276 Pages, 2020/03

JAEA-Research-2019-013.pdf:18.72MB

The Horonobe Underground Research Laboratory (URL) Project is being pursued by the Japan Atomic Energy Agency (JAEA) to enhance the reliability of relevant disposal technologies for geological disposal of High-level Radioactive Waste through investigations of the deep geological environment within the host sedimentary rock at Horonobe Town in Hokkaido, north Japan. The investigations will be conducted in three phases, namely "Phase 1: Surface based investigations", "Phase 2: Construction phase" (investigations during construction of the underground facilities) and "Phase 3: Operation phase" (research in the underground facilities). According to the research plan described in the 3rd Mid- and Long- term Plan of JAEA, "Near-field performance study", "Demonstration of repository design option", and "Verification of crustal-movement buffering capacity of sedimentary rocks" are important issues of the Horonobe URL Project, and schedule of future research and backfill plans of the project will be decided by the end of 2019 Fiscal Year. The present report summarizes the research and development activities of these 3 important issues carried out during 3rd Medium to Long-term Research Phase.

Journal Articles

Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La$$_{0.6}$$Sr$$_{0.4}$$MnO$$_3$$ thin films studied by X-ray magnetic circular dichroism

Shibata, Goro*; Yoshimatsu, Kohei*; Sakai, Enju*; Singh, V. R.*; Verma, V.*; Ishigami, Keisuke*; Harano, Takayuki*; Kadono, Toshiharu*; Takeda, Yukiharu; Okane, Tetsuo; et al.

Physical Review B, 89(23), p.235123_1 - 235123_5, 2014/06

AA2015-0419.pdf:0.33MB

 Times Cited Count:12 Percentile:53.39(Materials Science, Multidisciplinary)

Journal Articles

Magnetic and electronic properties of (LaMnO$$_3$$)$$_5$$(SrMnO$$_3$$)$$_5$$ superlattice revealed by resonant soft X-ray scattering

Kubota, Masato; Yamada, Hiroyuki*; Nakao, Hironori*; Okamoto, Jun*; Yamasaki, Yuichi*; Sawa, Akihito*; Murakami, Yoichi*

Japanese Journal of Applied Physics, 53(5S1), p.05FH07_1 - 05FH07_5, 2014/05

 Times Cited Count:2 Percentile:10.57(Physics, Applied)

Oral presentation

Study of magnetism in manganite superlattice by resonant soft X-ray scattering

Kubota, Masato; Yamada, Hiroyuki*; Okamoto, Jun*; Yamasaki, Yuichi*; Nakao, Hironori*; Murakami, Yoichi*; Sawa, Akihito*

no journal, , 

no abstracts in English

Oral presentation

Study of magnetism in manganite superlattice by resonant soft X-ray scattering

Kubota, Masato; Yamada, Hiroyuki*; Okamoto, Jun*; Yamasaki, Yuichi*; Nakao, Hironori*; Murakami, Yoichi*; Sawa, Akihito*

no journal, , 

no abstracts in English

Oral presentation

Study on magnetism of manganite superlattice

Kubota, Masato; Takeda, Masayasu; Yamada, Hiroyuki*; Sawa, Akihito*; Okamoto, Jun*; Nakao, Hironori*; Murakami, Yoichi*

no journal, , 

no abstracts in English

Oral presentation

Study of magnetism in perovskite manganite superlattice by quantum beam

Kubota, Masato; Takeda, Masayasu; Okamoto, Jun*; Nakao, Hironori*; Murakami, Yoichi*; Yamada, Hiroyuki*; Sawa, Akihito*

no journal, , 

Oral presentation

Artificial superlattice Mn thin films with the large magneto-resistance studied by resonant soft X-ray scattering under magnetic field

Kubota, Masato; Sudayama, Takaaki*; Yamasaki, Yuichi*; Okamoto, Jun*; Nakao, Hironori*; Murakami, Yoichi*; Yamada, Hiroyuki*; Sawa, Akihito*

no journal, , 

no abstracts in English

Oral presentation

Study of ferromagnetic superlattice by quantum beam

Kubota, Masato; Takeda, Masayasu; Okamoto, Jun*; Yamasaki, Yuichi*; Nakao, Hironori*; Murakami, Yoichi*; Sawa, Akihito*

no journal, , 

no abstracts in English

Oral presentation

Study of ferromagnetic superlattice by quantum beam

Kubota, Masato; Takeda, Masayasu; Yamada, Hiroyuki*; Sawa, Akihito*; Okamoto, Jun*; Nakao, Hironori*; Murakami, Yoichi*

no journal, , 

no abstracts in English

Oral presentation

Study of magnetism in manganite superlattice

Kubota, Masato; Yamada, Hiroyuki*; Sawa, Akihito*; Nakao, Hironori*; Murakami, Yoichi*

no journal, , 

no abstracts in English

Oral presentation

Study of manganite superlattice by quantum beam

Kubota, Masato; Yamada, Hiroyuki*; Sawa, Akihito*; Nakao, Hironori*; Murakami, Yoichi*

no journal, , 

no abstracts in English

13 (Records 1-13 displayed on this page)
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