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Collaborative Laboratories for Advanced Decommissioning Science; Osaka University*
JAEA-Review 2019-029, 36 Pages, 2020/02
JAEA-Review-2019-029.pdf:2.33MB
JAEA/CLADS, had been conducting the Center of World Intelligence Project for Nuclear Science/Technology and Human Resource Development (hereafter referred to "the Project") in FY2018. The Project aims to contribute to solving problems in nuclear energy field represented by the decommissioning of the Fukushima Daiichi Nuclear Power Station, Tokyo Electric Power Company Holdings, Inc. For this purpose, intelligence was collected from all over the world, and basic research and human resource development were promoted by closely integrating/collaborating knowledge and experiences in various fields beyond the barrier of conventional organizations and research fields. The sponsor of the Project was moved from the Ministry of Education, Culture, Sports, Science and Technology to JAEA since the newly adopted proposals in FY2018. On this occasion, JAEA constructed a new research system where JAEA-academia collaboration is reinforced and medium-to-long term research/development and human resource development contributing to the decommissioning are stably and consecutively implemented. Among the adopted proposals in FY2018, this report summarizes the research results of the "Development of Gel Filler that Facilitates Fuel Debris Retrieval". When gel materials such as polymer, silicate and clay minerals with adjusted viscosity are used in the process of debris retrieval, the gel would not leak down from the damaged parts, resulting in the reduction of surrounding air dose rate. In addition, gel materials can reduce the diffusion and scattering of dust that is produced by cutting. For these reasons, we propose a method where inside of a containment vessel is filled by gel materials in order to simplify the debris retrieval.
Ito, Chikara; Naito, Hiroyuki; Ishikawa, Takashi; Ito, Keisuke; Wakaida, Ikuo
JPS Conference Proceedings (Internet), 24, p.011038_1 - 011038_6, 2019/01
A high-radiation resistant optical fiber has been developed in order to investigate the interiors of the reactor pressure vessels and the primary containment vessels at the Fukushima Daiichi Nuclear Power Station. The tentative dose rate in the reactor pressure vessels is assumed to be up to 1 kGy/h. We developed a radiation resistant optical fiber consisting of a 1000 ppm hydroxyl doped pure silica core and 4 % fluorine doped pure silica cladding. We attempted to apply the optical fiber to remote imaging technique by means of fiberscope. The number of core image fibers was increased from 2000 to 22000 for practical use. The transmissive rate of infrared images was not affected after irradiation of 1 MGy. No change in the spatial resolution of the view scope by means of image fiber was noted between pre- and post-irradiation. We confirmed the applicability of the probing system, which consists of a view scope using radiation-resistant optical fibers.
Baba, Shinichi; Ishihara, Masahiro; Sozawa, Shizuo; Sekino, Hajime
JAERI-Data/Code 2003-003, 394 Pages, 2003/03
JAERI-Data-Code-2003-003.pdf:13.63MB
The research on the radiation damage mechanism of heat resistant ceramic composite materials is one of the research subjects of the innovative basic research in the field of high temperature engineering, using the High Temperature engineering Test Reactor (HTTR). Three series of irradiation tests on the heat resistant ceramic composite materials, first to third irradiation test program, were carried out using the Japan Material Testing Reactor (JMTR). This is a summary report on the the first irradiation test program; irradiation induced dimensional change, thermal expansion coefficient, X-ray diffraction and 
-ray spectrum are reported.
Oka, Kiyoshi; Shibanuma, Kiyoshi
Advanced Robotics, 16(6), p.493 - 496, 2002/12
Times Cited Count：8 Percentile：39.11(Robotics)no abstracts in English
Kiuchi, Kiyoshi; Ioka, Ikuo; Tachibana, Katsumi; Suzuki, Tomio; Fukaya, Kiyoshi*; Inohara, Yasuto*; Kambara, Shozo; Kuroda, Yuji*; Miyamoto, Satoshi*; Ogura, Kazutomo*
JAERI-Research 2002-008, 63 Pages, 2002/03
JAERI-Research-2002-008.pdf:7.85MB
no abstracts in English
Seguchi, Tadao; Kudo, Hisaaki; Sugimoto, Masaki; *
Nuclear Instruments and Methods in Physics Research B, 151(1-4), p.154 - 160, 1999/00
Times Cited Count：25 Percentile：84.81(Instruments & Instrumentation)no abstracts in English
*; Ikeda, Shigetoshi*; Seguchi, Tadao; Tabata, Yoneho*
Radiation Physics and Chemistry, 49(2), p.279 - 284, 1997/00
Times Cited Count：92 Percentile：98.16(Chemistry, Physical)no abstracts in English
*; *; Kasai, Noboru; Seguchi, Tadao
Hitachi Cable Rev., 0(15), p.79 - 82, 1996/08
no abstracts in English
Hoshiya, Taiji; Sekino, Hajime; Matsui, Yoshinori; ; *
Journal of Nuclear Materials, 233-237, p.599 - 603, 1996/00
no abstracts in English
Arigane, Kenji; ; Sasajima, Fumio; Takahashi, Hidetake; Seguchi, Tadao; *
JAERI-Tech 94-004, 33 Pages, 1994/07
no abstracts in English
Seguchi, Tadao; Sugimoto, Masaki*; Okamura, K.*
High Temperature Ceramic Matrix Composites; 6th European Conf. on Composite Materials: HT-CMC, p.51 - 57, 1993/00
no abstracts in English
and VO
after rare-gas sputteringSasaki, Teikichi; Baba, Yuji; Yamamoto, Hiroyuki; Sasase, Masato*; *
Surface and Interface Analysis, 20, p.682 - 686, 1993/00
Times Cited Count：4 Percentile：21.41(Chemistry, Physical)no abstracts in English
Arakawa, Kazuo; *; Sasuga, Tsuneo; *; *; *; Hagiwara, Miyuki; Seguchi, Tadao
JAERI-M 90-133, 33 Pages, 1990/08
no abstracts in English
Hoshiya, Taiji; ; Kizaki, Minoru; *; Sudo, Kenji; ;
JAERI-M 89-205, 68 Pages, 1989/12
no abstracts in English
O ion irradiation at liquid nitrogen temperature on superconducting properties of Bi-Pb-Sr-Ca-Cu-OIwase, Akihiro; Watanabe, Mitsuo; Iwata, Tadao; Nihira, Takeshi*
Japanese Journal of Applied Physics, 28(11), p.L1939 - L1941, 1989/11
Times Cited Count：14 Percentile：61.07(Physics, Applied)no abstracts in English
-ray irradiation effects of poly(ethylene-2、6-naphtha late) and poly(ethylene-terephtalate)Saito, Toshio*; Seguchi, Tadao; *; *
JAERI-M 89-096, 28 Pages, 1989/08
no abstracts in English
; ; Kitahara, Tanemichi;
JAERI-M 6200, 22 Pages, 1975/08
no abstracts in English
