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Sanada, Yukihisa; Takamura, Yoshihide; Urabe, Yoshimi; Tsuchida, Kiyofumi; Nishizawa, Yukiyasu; Yamada, Tsutomu; Sato, Yoshiharu; Hirayama, Hirokatsu; Nishihara, Katsuya; Imura, Mitsuo; et al.
JAEA-Research 2014-005, 67 Pages, 2014/05
Distribution of radiocesium existing on the waterbed such as lake or pond was concerned about at the present that passed for two years by an accident. Here, the direct measurement technique of the radiocesium concentration (in-situ measurement technique) was developed. This method was used an plastic scintillation detector (p-Scanner). This detector carried out quick measurement of a large area. In addition, the count-rate of p-Scanner was converted to the radiocesium concentration (Ba/kg-wet) by comparative measurement of -ray spectrometer. We applied the technique to the agricultural pond in Fukushima and made a map of distribution of radiocesium concentration.
Sato, Koji; Koma, Yoshikazu; Inoue, Akira; Yonezawa, Shigeaki; Takata, Takeshi; Nakabayashi, Hiroki; Namekawa, Takashi; Kawaguchi, Koichi
JNC TN9400 2004-036, 1051 Pages, 2004/06
The plant concept concerning the fuel cycle systems (combination of the reprocessing and the fuel fabrication )has been constructed to reduce their total cost by the introduction of various innovative techniques and to apply their utmost superior efficiency from such standpoints of a decrease in the environmental burden, better resource utilization and proliferation resistance improvement by the low decontamination transuranium element (TRU) recycle. For economical efficiency, less than 0.8 yen/kWh which is the demand value (total of the reprocessing expense and the fuel fabrication expense) of the fuel cycle expense satisfied each combination case at 200 tHM/y scale provisionally set for large-scale facilities. On the other hand, the combination case with a low breeder reactor core has satisfied the demand value, with improvement of the average burnup by the radial direction blanket fuel deletion contributing to the decrease of the fuel cycle expense at 50 tHM/y scale provisionally set for small-scale facilities.
Yonezawa, Shigeaki;
Proceedings of 11th International Conference on Nuclear Engineering (ICONE-11) (CD-ROM), P. 36536, 2003/00
None
; Kakehi, Isao; Moro, Satoshi; Yonezawa, Shigeaki; ; Tozawa, Katsuhiro
Proceedings of International Conference on Future Nuclear Systems (GLOBAL'99), 0 Pages, 1999/00
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Kakehi, Isao; ; ; ; Yonezawa, Shigeaki; Takahashi, Katsuro
Proceedings of International Conference on Future Nuclear Systems (GLOBAL'97), 0 Pages, 1997/10
None
Yonezawa, Shigeaki; Sanada, Yukihisa; Yamada, Tsutomu; Urabe, Yoshimi; Hirayama, Hirokatsu; Nishihara, Katsuya; Imura, Mitsuo
no journal, ,
no abstracts in English