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Okamoto, Yoshihiro; Osugi, Takeshi; Akabori, Mitsuo; Kobayashi, Toru; Shiwaku, Hideaki
Journal of Molecular Liquids, 232, p.285 - 289, 2017/04
Times Cited Count：3 Percentile：12.07(Chemistry, Physical)High energy XAFS measurement using cerium K-edge was performed to study the chemical state of cerium in high-temperature molten slag (SiO
-CaO-FeO
-CeO). It was found from the change in the nearest Ce-O distance obtained from EXAFS analysis and the energetic shift of the white line peak observed in XANES analysis that oxidation state of cerium was tetravalent in the molten state and trivalent in solid state. The Debye-Waller factor of the nearest Ce-O pair in solid slag was very large even at room temperature, and the change in its value upon heating and melting was very small. This result suggests that cerium is highly disordered and stable in solid slag.
Cs and 
Co in slag made from non-metallic radioactive wastesNakashima, Mikio; Nakashio, Nobuyuki; Kameo, Yutaka; Fukui, Toshiki*; Isobe, Motoyasu*; Otake, Atsushi*; Wakui, Takuji*; Hirabayashi, Takakuni*
Radiochimica Acta, 91(1), p.45 - 51, 2003/01
Times Cited Count：2 Percentile：18.9(Chemistry, Inorganic & Nuclear)no abstracts in English
Nakamura, Hisashi; Nakashima, Mikio
JAERI-Tech 2002-006, 58 Pages, 2002/03
JAERI-Tech-2002-006.pdf:2.56MB
Radiation exposure was estimated on production and utilization of recycled items using dismantling waste by assuming that their usage are restricted to nuclear facilities. The radiation exposure attributed to production of a steel-plate cast iron waste container, a receptacle for slag, and a drum reinforcement was calculated to be in the range of several 
Sv to several tens of Sv even in recycling contaminated metal waste of which radioactivity concentration of Co-60 is higher than the clearance level by a factor of two figures. It is also elucidated that casting of a multiple casting waste package meets the standards of dose equivalent rate for the transport of a radioactive package and the weight of the package will be able to kept around 20 tons for the convenience of the handling, in case of disposal of metal waste less than 37MBq/g with the steel-plate cast iron waste container. As the results, from the radiological exposure's point of view, it should be possible to use slightly contaminated metal for recycled items in waste management.
Nakamura, Hisashi; Fujiki, Kazuo
Nuclear Technology, 117(2), p.195 - 205, 1997/02
Times Cited Count：8 Percentile：56.29(Nuclear Science & Technology)no abstracts in English
Nakamura, Hideo; Kukita, Yutaka; *
Journal of Nuclear Science and Technology, 32(9), p.868 - 879, 1995/09
Times Cited Count：4 Percentile：43.23(Nuclear Science & Technology)no abstracts in English
Nakamura, Hisashi; Kanazawa, Katsuo; Fujiki, Kazuo
The 3rd JSME/ASME Joint Int. Conf. on Nuclear Engineering (ICONE),Vol. 4, 0, p.1785 - 1789, 1995/00
no abstracts in English
Nakamura, Hisashi; Kanazawa, Katsuo; Sato, Takayuki; ; Fujiki, Kazuo
Proc., SPECTRUM 94,Nuclear and Hazardous Waste Management Int. Topical Meeting,Vol. 1, 0, p.206 - 210, 1994/00
no abstracts in English
Nakamura, Hisashi; Fujiki, Kazuo
Technology and Programs for Radioactive Waste Management and Environmental Restoration,Vol. 2, p.1683 - 1686, 1993/00
no abstracts in English
Furukawa, Kazuo;
Trans.JIM, 19(19), p.553 - 561, 1978/00
no abstracts in English
(flibe) system and its applications; molten slag,molten-salt breeden reactor,fusion reactor,etcFurukawa, Kazuo;
Zairyo Kagaku, 14(6), p.302 - 309, 1977/06
no abstracts in English
Furukawa, Kazuo;
Nihon Kinzoku Gakkai-Shi, 41(5), p.450 - 457, 1977/05
no abstracts in English
Furukawa, Kazuo
Kinzoku Butsuri Semina, 2(3), p.177 - 184, 1977/03
no abstracts in English
Furukawa, Kazuo
Dai-42-Kai Nishiyama Kinen Gijutsu Koza (Nihon Tekko Kyokai), 42, p.1 - 26, 1976/00
no abstracts in English
