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Cs in organic layer and mineral soil in Japanese forests; Four-year observation and model analysisMuto, Kotomi; Atarashi-Andoh, Mariko; Matsunaga, Takeshi*; Koarashi, Jun
Journal of Environmental Radioactivity, 208-209, p.106040_1 - 106040_10, 2019/11
Times Cited Count：13 Percentile：48.62(Environmental Sciences)Vertical distributions of Cs in the soil profile were observed at five forest sites with different vegetation types for 4.4 years after the Fukushima Dai-ichi Nuclear Power Plant accident, and Cs migration in the organic layer and mineral soil was analyzed based on a comparison of models and observations. Cesium-137 migration from the organic layer was faster than that observed in European forests, suggesting that the mobility and bioavailability of Cs could be suppressed rapidly in Japanese forests. The diffusion coefficients of Cs in the mineral soil were estimated to be 0.042-0.55 cm
y
, which were roughly comparable with those of European forest soils affected by the Chernobyl Nuclear Power Plant accident. Model predictions indicated Cs mainly distributed in the surface mineral soil at 10 years after the accident. It suggest that the Cs deposited onto Japanese forest ecosystems will be retained in the surface layers of mineral soil for a long time.
Yamauchi, Toshihiko
Japanese Journal of Applied Physics, 43(9A), p.6473 - 6474, 2004/09
Times Cited Count：0 Percentile：0(Physics, Applied)The output pattern of He-Ne laser that passes through the optical glass fiber bundle used for free electron laser etc. depends on the weight of load (modulation of transverse mode). The increment of pattern radius exponentially increases with the load. It is considered that the micro bending causes this increment. Next, the estimated delay time also exponentially increases with the weight of load, and the estimated delay time is the extent of pico-second.
Noguchi, Hiroshi; Yokoyama, Sumi*
Health Physics, 84(3), p.344 - 353, 2003/03
Times Cited Count：1 Percentile：10.87(Environmental Sciences)no abstracts in English
Onuki, Akira; Akimoto, Hajime
Proc. of 1st European-Japanese Two-phase Flow Group Meeting, p.1 - 8, 1998/00
no abstracts in English
Onuki, Akira; Kamo, Hideki*; Akimoto, Hajime
Eighth Int. Topical Meeting on Nuclear Reactor Thermal-Hydraulics (NURETH-8), 3, p.1670 - 1676, 1997/00
no abstracts in English
Onuki, Akira;
Int. J. Multiph. Flow, 22(6), p.1143 - 1154, 1996/00
Times Cited Count：41 Percentile：83.45(Mechanics)no abstracts in English
Onuki, Akira; Kamo, Hideki*;
Proceedings of Japan-US Seminar on Two-Phase Flow Dynamics, 0, p.75 - 82, 1996/00
no abstracts in English
Yoshino, Ryuji; Neyatani, Yuzuru; Isei, Nobuaki; Koide, Yoshihiko; Kawano, Yasunori; A.Tanga*; Campbell, D. J.*; M.F.Johnson*; L.Rossi*
IAEA-CN-60/A5-8, 0, p.685 - 695, 1995/00
no abstracts in English
Watanabe, Tadashi; M.Wang*; Kukita, Yutaka
JAERI-M 93-039, 26 Pages, 1993/03
no abstracts in English
D.A.Humphreys*; Yoshino, Ryuji
JAERI-M 92-069, 25 Pages, 1992/05
no abstracts in English
; Onuki, Akira; Abe, Yutaka; Murao, Yoshio
Proc. of the Int. Conf. on Multiphase Flows 91-TSUKUBA, p.369 - 372, 1991/00
no abstracts in English
;
JAERI-M 9075, 32 Pages, 1980/09
no abstracts in English
