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Asazuma, Shinichiro
Hozengaku, 11(4), p.13 - 17, 2013/01
no abstracts in English
Okada, Takashi; Asazuma, Shinichiro; Kashiro, Kashio; Matsumoto, Masaki
CD-ROM, WM-5214, p.8, 8 Pages, 2005/00
The dismantling activities, which consist of removal of the glove panel, dismantling of the interior equipment and dismantling of the GB body and made up about 45% of the dismantling of the GB in GBDF, could be performed by remote control.
Asazuma, Shinichiro; Takeda, Shinso; Toshihiko, Ohnishi,; Soma, Susumu; Onose, Ken ; Shoichi, Tajima,; Okada, Takashi
JNC TN8420 2004-001, 122 Pages, 2004/11
JNC-TN8420-2004-001.pdf:167.0MB
In order to prevent spread of contamination, glovebox dismantling activity is usually performed in a confined enclosure with personal radioactive protective equipment. Since large potion of these materials is made of vinyl acetate, there exist potential risks of fire, damage and injury to the environment and workers during the dismantling (cutting or melting) operation. It is therefore important to establish standard for proper use of equipment and hazard controls in such a specific environment. Working Group composed of Tokai Works and O-arai Works has examined and developed the operational standard for cutting work in glovebox dismantlement. The result is reflected to the Tokai Works Safety Operational Standard.
Asazuma, Shinichiro; Okada, Takashi; Kashiro, Kashio; Matsumoto, Masaki; Nakata, Keiji*; Gonnokami, Kiyomi*; Toda, Rikiya*
JNC TN8430 2003-011, 56 Pages, 2004/01
JNC-TN8430-2003-011.pdf:2.07MB
The glove-box dismantling facility in the Plutonium Fuel Production Facility is developed to dismantle after-service glove-boxes with remote-controlled devices such as an arm-type manipulator. An abrasive wheel cutter, which is used to size reduce the gloveboxes, generates sparks during operation. This dispersing spark was a problem from the fire prevention point of view. A suitable spark control measures for this operation were required. We developed panels to minimize spark dispersion, shields to prevent the income of sparks to the pre-filter, and incombustible pre-filters. The equipment was tested and effectiveness was confirmed. This report provides the results of these tests.
Kitamura, Akihiro; Okada, Takashi; Asazuma, Shinichiro; Uematsu, Shinichi; Ishibashi, Takashi
Proceedings of 12th International Conference on Nuclear Engineering (ICONE-12) (CD-ROM), 6 Pages, 2004/00
The gloveboxes and process equipment used at plutonium fuel handling facilities had to bereplaced due to deterioration or change of object.
; *; *; Aoki, Isao; ;
JNC TN8410 2002-008, 136 Pages, 2002/04
JNC-TN8410-2002-008.pdf:9.98MB
The Plutonium Fuel Center at Tokai Works has installed the Waste Container Assay System #2 made by Canberra Industries in US to assay the quantity of plutonium at 2
PWSF. The Center had performed characteristic examination for WCAS#2 since June of 2000, and IAEA had performed the acceptance test for this equipment with MEXT JSGO inspectors in March of 2001. Therefore, WCAS|#2 was available to use as an accountancy control device and a safeguards inspection device since June of 2001. This characteristic examination was performed based on the experience of a similar examination of WCAS#1 using the PuO
powder of standard samples which were arranged to enter a state near real waste container. As a result, Assay error became about 9%(16) or less and the lower limit of detection is about 2mg(
Pu-eff). The safeguards inspection parameter was able to be set by this acceptance test.
Matsumoto, Kenichi*; Miyahara, Kenji; ; Asazuma, Shinichiro; Fukushima, Isao; Shoji, Kenji; Nojima, Yasuo; Kimura; Ikeda; Shibuya, Jun*; et al.
PNC TN8440 87-194, 82 Pages, 1987/08
no abstracts in English
Ojima, Hisao; *; Nakagawa, Rinshi
PNC TN8410 86-031, 143 Pages, 1986/06
The Laser Beam Disassembling Machine (L,B.D.M.) has been developed for getting rid of the wrapper tube before shearing in FBR spent fuel reprocessing. From 1984 to 1985, the following tests have been carried out with dummy assemblies to confirm the ability and performance of proto-type L.B.D.M. in 2nd EDF. The obtained results are presented here. (1)Disassembling test. It has been confirmed that L.B.D.M. had some superiorities on the cutting ability and the time required for disassembling. And some modification points about the machine and the disassembling Proceedure have been found out. (2)Confirmation test on optimum cutting condition the test has been carried out to optimise the cutting condition. Under the several parameters such as energy, cutting speed, kinds of assist gas, and so on. Based on the obtained data, the preliminary cutting condition could be set up. (3)Remote maintenance test on optical device. Because of using laser beam for cutting, the optical device is recognized to be peculiar part for remote maintenance. It has been evaluated that the remote maintenability of the device had no severe problems except a few minor points to be modified.
*; Nakagawa, Rinshi; *; *; *; *; Saito, Makoto; Ojima, Hisao
PNC TN841 85-05, 116 Pages, 1985/02
no abstracts in English
Nakagawa, Rinshi; *; *; Ojima, Hisao; *; *
PNC TN841 84-57, 48 Pages, 1985/01
no abstracts in English
Nakamichi, Shinya; Kitamura, Akihiro; Yanagawa, Chihiro; Nakai, Koji; Okada, Takashi; Asazuma, Shinichiro; Kashiro, Kashio
no journal, ,
no abstracts in English
Abe, Hironobu; Ikeda, Koki; Mikake, Shinichiro; Nagasaki, Yasushi; Niizato, Tadafumi; Asazuma, Shinichiro; Aoki, Isao; Ishikawa, Nobuyuki; Ishikawa, Hiroyasu; Ishizaki, Nobuhiro; et al.
no journal, ,
no abstracts in English
Sudo, Tomoyuki; Ishikawa, Hiroyasu; Uesaka, Takahiro*; Sonoda, Takashi; Ishikawa, Nobuyuki*; Niizato, Tadafumi; Mikake, Shinichiro; Aoki, Isao; Ishizaki, Nobuhiro; Imamura, Hiroaki; et al.
no journal, ,
JAEA is working the decontamination activity for the environmental remediation of Fukushima. In this activity, I support the decontamination activity for local governments to devise a decontamination plan and actually decontaminate. In this report, 1 introduce the technical knowhow for the decontamination activity of a house.
Hata, Katsuro; Ishikawa, Nobuyuki; Uesaka, Takahiro; Sudo, Tomoyuki; Matsumoto, Masaki; Aoki, Isao; Ishizaki, Nobuhiro; Imamura, Hiroaki; Uchida, Shinichi; Kikuchi, Sakae; et al.
no journal, ,
JAEA supports the decontamination activity that the local government of Fukushima carries out. In addition, JAEA carries out instruction and the advice about decontamination. I explain the concrete-based decontamination method of the house which polluted by the accident of the nuclear power plant.
Sumiya, Masato; Ikeda, Koki; Sonoda, Takashi; Niizato, Tadafumi; Mikake, Shinichiro; Abe, Hironobu; Inoue, Makoto; Eguchi, Kazutoshi; Kozawa, Masachiyo; Terunuma, Akihiro; et al.
no journal, ,
no abstracts in English
Aoki, Isao; Asazuma, Shinichiro; Sudo, Tomoyuki; Komiya, Tomokazu; Nakamura, Masahiko; Uchida, Shinichi; Kozawa, Masachiyo; Sonoda, Takashi; Mikake, Shinichiro; Ikeda, Koki; et al.
no journal, ,
JAEAs technical experiences and lessons learned for environmental remediationof Fukushima. (Technical supports for local governments)
Kanazawa, Shingo; Sudo, Tomoyuki; Komiya, Tomokazu; Hata, Katsuro; Nakamura, Masahiko; Kozawa, Masachiyo; Ohata, Kiyoshi; Nanko, Masayuki; Hoshino, Masato; Uchida, Shinichi; et al.
no journal, ,
JAEA is working the decontamination activity for the environmental remediation of Fukushima. In this activity, we support the decontamination activity for local governments to devise actually decontaminate. In this report, we show the decontamination effect of a house.
