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grade large tanksHayakawa, Masato; Shimoyama, Kazuhito; Miyakoshi, Hiroyuki; Suzuki, Shigeaki*
JAEA-Technology 2021-027, 33 Pages, 2022/01
JAEA-Technology-2021-027.pdf:3.64MB
At the Oarai Research and Development Institute of the Japan Atomic Energy Agency, experimental studies in various sodium environments are being conducted in connection with the research and development of sodium-cooled fast reactors such as the experimental fast reactor Joyo and the prototype fast reactor Monju. The dismantling of sodium test facilities and equipment that have achieved their purpose has been carried out sequentially, and a wealth of experience and technology has been accumulated. On the other hand, a large amount of metallic sodium used for research and testing is being reused for new testing facilities, and the large sodium tanks that contained the metallic sodium are being dismantled. In order to dismantle these tanks safely and efficiently, it is important to reduce the residual sodium inside the tanks (especially at the bottom) as much as possible before dismantling. Therefore, we have been working on the reduction of residual sodium at the bottom of several large sodium tanks of 100 m class. This report describes the technologies and experiences related to the reduction of residual sodium that have been carried out so far.
Kimura, Yasuhisa; Hirano, Hiroshi; Watahiki, Masatoshi; Kuba, Meiji; Ishikawa, Shinichiro
Dekomisshoningu Giho, (52), p.45 - 54, 2015/09
The Plutonium Fuel Fabrication Facility (PFFF) of the Japan Atomic Energy Agency is now in its decommissioning phase. In the PFFF, terminated gloveboxes have been dismantled. Gloveboxes to be dismantled are surrounded by a plastic enclosure to prevent contamination from being spread into process room. Dismantling operations for gloveboxes are performed manually by workers, each wearing an air-feed suit. However, the mental and physical loads placed on workers wearing the air-feed suits are intensively high. Therefore, R&Ds on new dismantling technologies including utilization of heavy machines covered with plastic enclosure for anti-contamination have been started to reduce the potential risks associated with workers and decommissioning costs. In this paper, the status of decommissioning of the PFFF and the overview of developed dismantling technologies for 
-tight gloveboxes are described.
Myodo, Masato; Okane, Shogo; Miyajima, Kazutoshi
Dekomisshoningu Giho, (23), p.2 - 16, 2001/03
no abstracts in English
JAERI-Tech 97-001, 87 Pages, 1997/02
no abstracts in English
Miyasaka, Yasuhiko
Dekomisshoningu Giho, 0(14), p.24 - 33, 1996/08
no abstracts in English
Miyasaka, Yasuhiko; ; Tanaka, Mitsugu; Nakamura, Hisashi; ; Tachibana, Mitsuo; ; Hatakeyama, Mutsuo; ; Yoshimori, Michiro; et al.
Nihon Genshiryoku Gakkai-Shi, 38(7), p.553 - 576, 1996/00
no abstracts in English
RANDEC Nyusu, 0(27), p.6 - 7, 1995/10
no abstracts in English
Miyasaka, Yasuhiko
Enerugi Rebyu, 15(9), p.11 - 15, 1995/00
no abstracts in English
; Nemoto, Koichi; ; Miyajima, Kazutoshi; Ito, Akira*
IMechE Conf. Trans., Int. Conf. on Nuclear Decommissioning, 0, p.229 - 235, 1995/00
no abstracts in English
Kamata, Hirofumi*; Mimori, Takeo; *; Sivakumaran, W.*; *; Ito, Akira*
Nuclear Decom '95 (Poster Session), 1 Pages, 1995/00
no abstracts in English
Mimori, Takeo; Kumagai, Norio*
Nuclear Decom '95 (Poster Session), 2 Pages, 1995/00
no abstracts in English
Okane, Shogo; Miyajima, Kazutoshi; Takahashi, Hideki;
The 3rd JSME/ASME Joint Int. Conf. on Nuclear Engineering (ICONE),Vol. 4, 0, p.1905 - 1908, 1995/00
no abstracts in English
Miyasaka, Yasuhiko
Dekomisshoningu Giho, (10), p.57 - 67, 1994/06
no abstracts in English
Fujiki, Kazuo;
EUR-15691, 0, p.133 - 146, 1994/00
no abstracts in English
; Nakano, Tomoyuki; *; *; Asami, Makoto*; Tanimoto, Kenichi; Enokido, Yuji
PNC TN9080 92-001, 107 Pages, 1992/01
None
Hoshi, Tatsuo; ; *; *; *; *; *; *
FAPIG, 0(129), p.28 - 32, 1991/11
no abstracts in English
Genshiryoku Shisetsu Dekomisshoningu Gijutsu, p.39 - 75, 1991/00
no abstracts in English
Fujiki, Kazuo
Kinzoku, 60(9), p.31 - 35, 1990/09
no abstracts in English
Takeishi, Hideyo; ; ; Kono, Nobuaki; ; Yonezawa, Chushiro; Hatakeyama, Mutsuo;
JAERI-M 89-224, 45 Pages, 1990/01
no abstracts in English
