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Ito, Toshimichi; Aramaki, Takafumi*; Otosaka, Shigeyoshi; Suzuki, Takashi; Togawa, Orihiko; Kobayashi, Takuya; Kawamura, Hideyuki; Amano, Hikaru; Senju, Tomoharu*; Chaykovskaya, E. L.*; et al.
Journal of Nuclear Science and Technology, 42(1), p.90 - 100, 2005/01
Times Cited Count：14 Percentile：67.84(Nuclear Science & Technology)During 1996-2002, a wide-area research project on anthropogenic radionuclides was done in the Japanese and Russian EEZ of the Japan Sea to investigate their migration. As the results of expeditions in 2001 and 2002, (1) the concentrations and distributions of radionuclides are similar to the results of previous, (2) inventories of these radionuclides indicate accumulation in the Japan Sea seawater compared to the amounts supplied by global fallout, (3) 
Sr and 
Cs concentrations in intermediate layer show temporal variations, and 4) the variations may reflect the water mass movement in upper part of the Japan Sea.
Ito, Toshimichi; Aramaki, Takafumi*; Otosaka, Shigeyoshi; Suzuki, Takashi; Togawa, Orihiko; Kobayashi, Takuya; Senju, Tomoharu*; Chaykovskaya, E. L.*; Lishavskaya, T. S.*; Karasev, E. V.*; et al.
Proceedings of International Symposium on Radioecology and Environmental Dosimetry, p.396 - 401, 2003/10
no abstracts in English
Tkalin, A. V.*; Lishavskaya, T. S.*; Belan, T. A.*; Karasev, E. V.*; Togawa, Orihiko
Pacific Oceanography, 1(1), p.42 - 52, 2003/08
no abstracts in English
U, 
U, and 
Pu in JENDL-3.2Kawano, Toshihiko*; Shibata, Keiichi
JAERI-Research 2003-001, 36 Pages, 2003/02
JAERI-Research-2003-001.pdf:1.67MB
Evaluation of covariances for resolved resonance parameters of 
, 
, and 
was carried out. Although a large number of resolved resonances are observed for major actinides, uncertainties in averaged cross sections are more important than those in resonance parameters in reactor calculations. We developed a simple method which is to provide a covariance matrix for the resolved resonance parameters on the basis of uncertainties in the averaged cross sections. The method was adopted to evaluate the covariance data for some important actinides, and the results were compiled in the JENDL-3.2 covariance file.
, , and with the Reich-Moore 
-matrix theory for JENDL-3.2Kawano, Toshihiko*; Shibata, Keiichi
Journal of Nuclear Science and Technology, 39(8), p.807 - 815, 2002/08
Times Cited Count：6 Percentile：39.54(Nuclear Science & Technology)A simple method to estimate covariances for resolved resonance parameters was developed. Although a large number of resolved resonances are observed for major actinides, uncertainties in averaged cross sections are more important than those in resonance parameters in reactor calculations. The method developed here is to derive a covariance matrix for the resolved resonance parameters which gives an appropriate uncertainty of the averaged cross sections. The method was adopted to evaluate the covariance data for , , and resonance parameters in JENDL-3.2,with the Reich-Moore R-matrix formula.
Sanada, Yukihisa*; Matsunaga, Takeshi; Yanase, Nobuyuki; Nagao, Seiya; Amano, Hikaru; Takada, Hideshige*; Tkachenko, Y.*
Applied Radiation and Isotopes, 56(5), p.751 - 760, 2002/04
Times Cited Count：14 Percentile：65.6(Chemistry, Inorganic & Nuclear)Areas contaminated with radionuclides from the Chernobyl nuclear accident have been identified in Pripyat River near the Chernobyl Nuclear Power Plant. The bottom sediments contained Cs (10
- 10
Bq/m
) within 0-30 cm depth, which is comparable to the ground soil of in the vicinity of the nuclear power plant (the Exclusion Zone). The sediments also accumulated Sr (10 Bq/m ), 
Pu (10
Bq/m ), 
Am (10 Bq/m ) derived from the accident.The comparison of these inventories with those of the released radionuclides at the accident and the experimental analysis using the selective sequential extraction of the radionuclides in the sediments suggest that the potential mobility of Cs and Pu is low compared with Sr in the bottom sediment, while the potential dissolution of Sr from the river bottom sediment should be taken into account with respect to the long-term radiological influence on the aquatic environment.
Cs and ,
Pu in the oligotrophic and mesotrophic lake sedimentsNagao, Seiya; Matsunaga, Takeshi; Muraoka, Susumu
Journal of Radioanalytical and Nuclear Chemistry, 239(3), p.555 - 559, 1999/00
Times Cited Count：7 Percentile：49.7(Chemistry, Analytical)no abstracts in English
Yamamoto, Tadatoshi; Gunji, Katsubumi; *
JAERI-Research 98-072, 21 Pages, 1998/12
JAERI-Research-98-072.pdf:1.19MB
no abstracts in English
)Okajima, Shigeaki; Sakurai, Takeshi; Mukaiyama, Takehiko
JAERI-Conf 97-005, 00(00), p.71 - 76, 1997/00
no abstracts in English
Pu neutron transmissions and fission cross sections in energy range from 1.0 keV to 2.5 keVH.Derrien*
Journal of Nuclear Science and Technology, 30(9), p.845 - 862, 1993/09
Times Cited Count：11 Percentile：72.08(Nuclear Science & Technology)no abstracts in English
activity measurements with pulse shape discrimination; Application to the determination of -nuclides in environmental samples*; ; *; *
Radioisotopes, 33(12), p.841 - 846, 1984/00
no abstracts in English
; Kikuchi, Yasuyuki; Nakagawa, Tsuneo
Nihon Genshiryoku Gakkai-Shi, 20(1), p.30 - 36, 1978/01
Times Cited Count：0no abstracts in English
Umezawa, Hirokazu; ;
Journal of Nuclear Science and Technology, 13(6), p.327 - 332, 1976/06
Times Cited Count：17no abstracts in English
Journal of Nuclear Science and Technology, 12(7), p.442 - 449, 1975/07
Times Cited Count：1no abstracts in English
; ; Katsuragi, Satoru
Dai-1-Kai Toropikaru Mithingu Hobunshu; Kosokuro Butsuri, p.68 - 76, 1973/00
no abstracts in English
Takimoto, Misaki; Yamazaki, Takumi; Takada, Chie; Momose, Takumaro
no journal, ,
no abstracts in English
Nauchi, Yasushi*; Kosuge, Yoshihiro*; Nomi, Takayoshi; Suzuki, Risa; Nagatani, Taketeru; Shiba, Tomooki; Takada, Akira*; Kaburagi, Masaaki; Okumura, Keisuke
no journal, ,
no abstracts in English
