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Cs in the Abukuma River basin considering the characteristics of Cs behavior in land usesIkenoue, Tsubasa; Shimadera, Hikari*; Nakanishi, Takahiro; Kondo, Akira*
Science of the Total Environment, 876, p.162846_1 - 162846_12, 2023/06
Times Cited Count：2 Percentile：68.68(Environmental Sciences)We conducted 30 years simulation of environmental fate of Cs in the Abukuma River basin considering the characteristics of the Cs behavior in land uses. Overall, in the Abukuma River basin, the Cs transported into the ocean for 30 years was estimated to correspond to 4.6% of the initial deposition in the basin, and the effective half-life of Cs deposited in the basin was estimated to be 3.7 years shorter (by 11.6%) than its physical half-life. These results suggested that Cs deposited from the accident could still remain for decades. Based on the analysis of the Cs behavior in land use, in 2011, the contribution of Cs export to the ocean from urban lands was estimated to correspond to 70% of the total Cs export. Meanwhile, from 2012 to 2040, the contribution of Cs export from agricultural lands was estimated to correspond to 75% of the total Cs export. The reduction ratios excluding radioactive decay of Cs remained in areas with and without human activities for 30 years after the accident, defined as the ratios of the total outflow to the initial deposition, were estimated to be 11.5%-17.7% and 0.4%-1.4%, respectively. These results suggested that human activities enhance the reduction of Cs remaining in land in the past and future.
Funato, Takumi*; Yamakage, Ai*; Matsuo, Mamoru
Physical Review B, 106(21), p.214420_1 - 214420_7, 2022/12
Times Cited Count：1 Percentile：15.88(Materials Science, Multidisciplinary)Iwamoto, Hiroki
Kaku Deta Nyusu (Internet), (129), p.19 - 25, 2021/06
no abstracts in English
Ikenoue, Tsubasa; Shimadera, Hikari*; Kondo, Akira*
Journal of Environmental Radioactivity, 225, p.106452_1 - 106452_12, 2020/12
Times Cited Count：4 Percentile：14.27(Environmental Sciences)This study focused on the uncertainty of the factors of the Universal Soil Loss Equation (USLE) and evaluated its impacts on the environmental fate of Cs simulated by a radiocesium transport model in the Abukuma River basin. The USLE has five physically meaningful factors: the rainfall and runoff factor (R), soil erodibility factor (K), topographic factor (LS), cover and management factor (C), and support practice factor (P). The simulation results showed total suspended sediment and Cs outflows were the most sensitive to C and P among the all factors. Therefore, land cover and soil erosion prevention act have the great impact on outflow of suspended sediment and Cs. Focusing on land use, the outflow rates of Cs from the forest areas, croplands, and undisturbed paddy fields were large. This study indicates that land use, especially forest areas, croplands, and undisturbed paddy fields, has a significant impact on the environmental fate of Cs.
Furuta, Takuya; Hashimoto, Shintaro; Sato, Tatsuhiko
Igaku Butsuri, 36(1), p.50 - 54, 2016/00
An application of Particle and Heavy Ion Transport Code System; PHITS, for medical physics is to simulate treatment planning of radiation therapy. Treatment planning simulation is conducted by constructing patient geometry from patient CT data, calculating radiation transport of external beam, and deducing dose distribution inside patient body. However, it is not easy to extract information such as patient location and CT value distribution from patient CT data or to construct complex accelerator geometry in PHITS format. Therefore, we developed two user assistance programs, DICOM2PHITS and PSFC4PHITS. DICOM2PHITS is a program to construct the voxel PHITS simulation geometry from patient CT DICOM image data. PSFC4PHITS is a program to convert the IAEA phase-space file data to PHITS format to be used as simulation source of PHITS. We explain these two programs by showing some applications in this article.
Takenaga, Hidenobu; Oyama, Naoyuki; Bruskin, L. G.*; Mase, Atsushi*; Takizuka, Tomonori; Fujita, Takaaki
Plasma Physics and Controlled Fusion, 48(5A), p.A401 - A408, 2006/05
Times Cited Count：6 Percentile：21.49(Physics, Fluids & Plasmas)no abstracts in English
Takenaga, Hidenobu; Nakano, Tomohide; Asakura, Nobuyuki; Kubo, Hirotaka; Konoshima, Shigeru; Shimizu, Katsuhiro; Tsuzuki, Kazuhiro; Masaki, Kei; Tanabe, Tetsuo*; Ide, Shunsuke; et al.
Nuclear Fusion, 46(3), p.S39 - S48, 2006/03
Times Cited Count：18 Percentile：52.36(Physics, Fluids & Plasmas)no abstracts in English
Takenaga, Hidenobu; Nakano, Tomohide; Asakura, Nobuyuki; Kubo, Hirotaka; Konoshima, Shigeru; Shimizu, Katsuhiro; Tsuzuki, Kazuhiro; Ide, Shunsuke; Fujita, Takaaki
Proceedings of 4th IAEA Technical Meeting on Steady-State Operation of Magnetic Fusion Devices and MHD of Advanced Scenarios (Internet), 8 Pages, 2005/02
no abstracts in English
Takenaga, Hidenobu; Oyama, Naoyuki; Fujita, Takaaki; Yamada, Hiroshi*; Nishimura, Kiyohiko*; Tanaka, Kenji*; Sakamoto, Ryuichi*
Annual Report of National Institute for Fusion Science; April 2003 - March 2004, P. 12, 2003/10
no abstracts in English
Chankin, A. V.; Asakura, Nobuyuki; Fukuda, Takeshi; Isayama, Akihiko; Kamada, Yutaka; Miura, Yukitoshi; Oyama, Naoyuki; Takeji, Satoru; Takenaga, Hidenobu
Nuclear Fusion, 42(6), p.733 - 742, 2002/06
Times Cited Count：21 Percentile：55.8(Physics, Fluids & Plasmas)no abstracts in English
ray transport simulation by Monte Carlo methodNuclear Code Evaluation Special Committee of Nuclear Code Research Committee
JAERI-Review 2002-004, 401 Pages, 2002/03
JAERI-Review-2002-004.pdf:16.2MB
no abstracts in English
Kishimoto, Yasuaki
Purazuma, Kaku Yugo Gakkai-Shi, 76(12), p.1280 - 1308, 2000/12
no abstracts in English
Yoshizawa, Michio; Saegusa, Jun; Yoshida, Makoto; Sugita, Takeshi*
Proceedings of 10th International Congress of the International Radiation Protection Association (IRPA-10) (CD-ROM), 4 Pages, 2000/05
no abstracts in English
Hamamatsu, Kiyotaka; Takizuka, Tomonori; Shirai, Hiroshi; Kishimoto, Yasuaki; C.S.Chang*
Europhysics Conference Abstracts (CD-ROM), 23J, p.421 - 424, 1999/00
no abstracts in English
Tsushima, Akira*; Uehara, Kazuya; Amemiya, Hiroshi*
Journal of Plasma and Fusion Research SERIES, Vol.2, p.81 - 84, 1999/00
no abstracts in English
Kubo, Hirotaka; Takenaga, Hidenobu; Kumagai, Akira*; Higashijima, Satoru; Suzuki, Shingo*; Sugie, Tatsuo; Sakasai, Akira; Itami, Kiyoshi
Plasma Physics and Controlled Fusion, 41(6), p.747 - 757, 1999/00
Times Cited Count：20 Percentile：55(Physics, Fluids & Plasmas)no abstracts in English
Asakura, Nobuyuki; Itami, Kiyoshi; Hosogane, Nobuyuki; Tsuji, Shunji; Shimizu, K.*; Kubo, Hirotaka; Sugie, Tatsuo; Takizuka, Tomonori; Shimada, Michiya
Journal of Nuclear Materials, 220-222, p.395 - 399, 1995/00
Times Cited Count：33 Percentile：93.13(Materials Science, Multidisciplinary)no abstracts in English
Nagashima, Keisuke; Sakasai, Akira; Fukuda, Takeshi
Nuclear Fusion, 33(11), p.1677 - 1683, 1993/00
Times Cited Count：23 Percentile：61.25(Physics, Fluids & Plasmas)no abstracts in English
Tsuji, Shunji; Hosogane, Nobuyuki; Itami, Kiyoshi; Kubo, Hirotaka; Nishitani, Takeo; Shimada, Michiya; Koide, Yoshihiko; *; Sugie, Tatsuo; Nagashima, Keisuke; et al.
JAERI-M 91-195, 47 Pages, 1991/11
no abstracts in English
Shimizu, Katsuhiro; Shimada, Michiya; Takizuka, Tomonori
JAERI-M 91-161, 23 Pages, 1991/10
no abstracts in English
