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Katata, Genki; Hayashi, Kentaro*; Ono, Keisuke*; Nagai, Haruyasu; Miyata, Akira*; Mano, Masayoshi*
Agricultural and Forest Meteorology, 180, p.1 - 21, 2013/10
Times Cited Count：19 Percentile：65.81(Agronomy)A multi-layer atmosphere-SOiL-VEGetation model (SOLVEG) was modified to calculate the NH
exchange fluxes over a paddy field. The heat transfer at the paddy water layer and the dry deposition of water-soluble gases such as NH and SO
onto the wet canopy, as well as the emission potentials of NH from the rice foliage and the surface of floodwater or soil were incorporated into the model. The modified model reproduced the observed surface and NH fluxes, paddy water temperature, and soil temperature and moisture during both the fallow and cropping seasons. The "recaptured fraction" was defined as the ratio of the amount of volatilized NH recaptured by the foliage to the total amount. Numerical experiments using the modified model with varying emission potentials of NH showed that the recaptured fraction increased with an increase in the leaf area index (LAI) and saturated when LAI 
1 because of the limitation of stomatal uptake.
Endo, Satoru*; Tomita, Jumpei*; Tanaka, Kenichi*; Yamamoto, Masayoshi*; Fukutani, Satoshi*; Imanaka, Tetsuji*; Sakaguchi, Aya*; Amano, Hikaru; Kawamura, Hidehisa*; Kawamura, Hisao*; et al.
Radiation and Environmental Biophysics, 47(3), p.359 - 365, 2008/07
Times Cited Count：5 Percentile：21.04(Biology)Dolon village located about 60 km from the border of the Semipalatinsk Nuclear Test Site is known to be heavily contaminated by the first USSR atomic bomb test in August 1949. Soil samples around Dolon were taken in October 2005 in an attempt to evaluate internal thyroid dose arising from incorporation of radioiodine isotopes (mainly 
I). Iodine-129 in soil was measured by using the technique of Accelerator Mass Spectrometry. From the relationship between 
I and 
Cs (corrected for background and decay from 1949 to 2005) accumulated levels, the background level of I and the I/Cs ratio around Dolon were estimated to be (6.4 
0.4) 
10
atoms m
and 0.25 0.16, respectively. This I/Cs ratio is almost similar to the fission yield ratio for 
Pu fast fission (0.24).
Shima, Shigeki*; Gasa, Shinichi*; Amano, Hikaru; Nagao, Seiya*; Yamamoto, Masayoshi*; Momoshima, Noriyuki*; Furukawa, Masahide*; Kimura, Hideki*; Kawamura, Hisao*
JAEA-Conf 2008-003, p.28 - 31, 2008/04
Concentrations of I in surface seawater around Japan were approximately 210
atoms/L in literatures. However, the atomic ratio of iodine to cesium was ten times as high as that of the global fallout. The origin of I in the water columns seems to be difficult to be explained by only the global fallout. Discharge from European plants was one of the possible origins of iodine from the standpoint of air mass trajectory analysis. Concentration of I in rain water was 10 times higher than that in surface seawater. Anthropogenic inorganic iodine in surface seawater predominantly dissolves as an iodide ion (I
).
Saegusa, Hiromitsu; Seno, Yasuhiro; Nakama, Shigeo; Tsuruta, Tadahiko; Iwatsuki, Teruki; Amano, Kenji; Takeuchi, Ryuji; Matsuoka, Toshiyuki; Onoe, Hironori; Mizuno, Takashi; et al.
JAEA-Research 2007-043, 337 Pages, 2007/03
JAEA-Research-2007-043.pdf:28.14MB
The Mizunami Underground Laboratory (MIU) Project is a comprehensive research project investigating the deep underground environment within crystalline rock being conducted by Japan Atomic Energy Agency at Mizunami City in Gifu Prefecture, central Japan. This report summarizes the results of the Surface-based Investigation Phase, identifies future issues and provides direction for research to be conducted during Construction Phase and Operation Phase. The results compiled in this report will be utilized for the technical knowledge base on geological disposal of HLW, and can be used to enhance the technical basis for waste disposal in general and for development of government regulations.
Shibata, Keiichi; Kawano, Toshihiko*; Nakagawa, Tsuneo; Iwamoto, Osamu; Katakura, Junichi; Fukahori, Tokio; Chiba, Satoshi; Hasegawa, Akira; Murata, Toru*; Matsunobu, Hiroyuki*; et al.
Journal of Nuclear Science and Technology, 39(11), p.1125 - 1136, 2002/11
Times Cited Count：669 Percentile：96.97(Nuclear Science & Technology)Evaluation for JENDL-3.3 has been performed by considering the accumulated feedback information and various benchmark tests of the previous library JENDL-3.2. The major problems of the JENDL-3.2 data were solved by the new library: overestimation of criticality values for thermal fission reactors was improved by the modifications of fission cross sections and fission neutron spectra for 
U; incorrect energy distributions of secondary neutrons from important heavy nuclides were replaced with statistical model calculations; the inconsistency between elemental and isotopic evaluations was removed for medium-heavy nuclides. Moreover, covariance data were provided for 20 nuclides. The reliability of JENDL-3.3 was investigated by the benchmark analyses on reactor and shielding performances. The results of the analyses indicate that JENDL-3.3 predicts various reactor and shielding characteristics better than JENDL-3.2.
Nagao, Seiya; Yanase, Nobuyuki; Yamamoto, Masayoshi*; Kofuji, H.*; Sorin, Yoshiki*; Amano, Hikaru
Journal of Radioanalytical and Nuclear Chemistry, 252(2), p.225 - 232, 2002/05
Times Cited Count：9 Percentile：51.46(Chemistry, Analytical)no abstracts in English
Fukahori, Tokio; Chiba, Satoshi; Shibata, Keiichi; Ikeda, Yujiro; Aruga, Takeo; Watanabe, Yukinobu*; Murata, Toru*; Yamano, Naoki*; Kawai, Masayoshi*
Reactor Dosimetry: Radiation Metrology and Assessment (ASTM STP 1398), p.591 - 598, 2001/00
no abstracts in English
Kawai, Masayoshi*; ; *; Yamano, Naoki*; *; *; *; *; Sakurai, Kiyoshi
JAERI 1330, 129 Pages, 1994/03
no abstracts in English
Fukahori, Tokio; Kunieda, Satoshi; Chiba, Satoshi; Harada, Hideo; Nakashima, Hiroshi; Mori, Takamasa; Shimakawa, Satoshi; Maekawa, Fujio; Watanabe, Yukinobu*; Shigyo, Nobuhiro*; et al.
no journal, ,
The latest version of JENDL High Energy File (JENDL/HE) and JENDL Photonuclear Data File (JENDL/PD) is being planed to be released as JENDL/HE-2007 and JENDL/PD-2007. In JENDL/HE-2007, nuclear data for about 100 nuclides, which are newly ecaluated and revised from JENDL/HE-2004 will be stored. The JENDL/PD-2007 will have nuclear data for about 170 nuclides.
Katata, Genki; Ono, Keisuke*; Hayashi, Kentaro*; Nagai, Haruyasu; Miyata, Akira*; Mano, Masayoshi*
no journal, ,
In order to investigate the nitrogen cycling at the paddy field, a multi-layer atmosphere-soil-vegetation model (SOLVEG) was modified to simulate water and heat exchanges at the rice paddy field. The SOLVEG is useful to evaluate the impacts of atmospheric nitrogen deposition on paddy fields since the well-validated schemes of atmospheric gas and particle deposition onto leaf surfaces are included. The model was tested at the Mase paddy site in Japan. The SOLVEG reproduced well the temporal variations in of water, heat and momentum fluxes over the paddy field after harvest. The analyses of the calculated CO and surface fluxes were also made to clarify the atmosphere-rice plants exchanges during the growing season of rice plants.
flux over rice paddy field by the inferential methodKatata, Genki; Hayashi, Kentaro*; Ono, Keisuke*; Nagai, Haruyasu; Miyata, Akira*; Mano, Masayoshi*
no journal, ,
no abstracts in English
Watanabe, Makoto*; Higashi, Hideo*; Sasaki, Minako*; Adachi, Masayoshi*; Otsuka, Makoto*; Fukuyama, Hiroyuki*; Nishi, Tsuyoshi; Yamano, Hidemasa
no journal, ,
This reports results of density measurement of molten iron and nickel that are main components of stainless steel 316 of cladding of control rod as part of thermophysical properties studies of molten control rod material in BWR.
Watanabe, Makoto*; Higashi, Hideo*; Sasaki, Minako*; Adachi, Masayoshi*; Otsuka, Makoto*; Fukuyama, Hiroyuki*; Nishi, Tsuyoshi; Yamano, Hidemasa
no journal, ,
In this study, as a first step, density of the stainless steel 316 (SUS316), pure Fe and Ni were measured. For all samples, the densities are expressed with a linear function of temperature.
C by in-situ observation and quench method with electromagnetic levitationFukuyama, Hiroyuki*; Higashi, Hideo*; Otsuka, Makoto*; Adachi, Masayoshi*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to investigate the eutectic reaction mechanism of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes a solidification pathway of SUS316L containing 9-11mass% BC by in-situ observation and quench method with electromagnetic levitation.
C using ultrahigh-temperature thermal analysis based on blackbody radiationHigashi, Hideo*; Fukuyama, Hiroyuki*; Otsuka, Makoto*; Adachi, Masayoshi*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to investigate the eutectic reaction mechanism of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes a melting behavior analysis of SUS316L containing 9-11mass% BC using ultrahigh-temperature thermal analysis based on blackbody radiation.
C by a combination of ultra-high temperature thermal analysis and microstructural observationFukuyama, Hiroyuki*; Higashi, Hideo*; Adachi, Masayoshi*; Otsuka, Makoto*; Yamano, Hidemasa
no journal, ,
A BN crucible with blackbody cavity containing the sample (14, 17mass%BC-SS) was set in the furnace and then heated in an Ar gas atmosphere. The samples were electromagnetically levitated and completely melted, then the temperature was gradually lowered to below the liquidus temperature or below the eutectic temperature, and then quenched. The surfaces and cross sections of the solidified samples were observed by SEM-EDX, and the phases were identified by an X-ray diffractometer.
C using ultrahigh-temperature thermal analysis based on blackbody radiationHigashi, Hideo*; Fukuyama, Hiroyuki*; Otsuka, Makoto*; Adachi, Masayoshi*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to investigate the eutectic reaction mechanism of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes a melting behavior analysis of SUS316L containing 14, 17mass% BC using ultrahigh-temperature thermal analysis based on blackbody radiation.
C by in-situ observation and quench method with electromagnetic levitationFukuyama, Hiroyuki*; Higashi, Hideo*; Otsuka, Makoto*; Adachi, Masayoshi*; Yamano, Hidemasa
no journal, ,
The purpose of this study is to investigate the eutectic reaction mechanism of the control rod material (boron carbide (BC)) and the structural material of a reactor vessel (stainless steel: SUS316L (SS)) during a core disruptive accident in a sodium-cooled fast reactor. This paper describes a solidification pathway of SUS316L containing 14, 17mass% BC by in-situ observation and quench method with electromagnetic levitation.
