Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Ogawa, Shuichi*; Yoshigoe, Akitaka; Takakuwa, Yuji*
Vacuum and Surface Science, 62(6), p.350 - 355, 2019/06
Thermal oxidation of Si substrate is an indispensable process for the Si device fabrication. However, the influence of oxidation induced strain cannot be ignored for thin films. Synchrotron radiation real-time photoelectron spectroscopy was used as a method to measure simultaneously oxidation induced strain and oxidation rate. It was found that the acceleration of interfacial oxidation induced by thermal strain was observed for the rapid thermal oxidation. The results can be explained by the model in which point defects caused by strain become reaction sites at the SiO
/Si interface.
Ito, Hiroto*; Shiotsu, Hiroyuki; Tanaka, Yoichi*; Nishihara, Satomichi*; Sugiyama, Tomoyuki; Maruyama, Yu
JAEA-Data/Code 2018-012, 42 Pages, 2018/10
JAEA-Data-Code-2018-012.pdf:4.93MB
Chemical composition of fission products transported in nuclear facilities in severe accidents is controlled by slower chemical reaction rates, therefore, it could be different from that evaluated on the chemical equilibrium assumption. Hence, it is necessary to evaluate the chemical composition with reaction kinetics. On the other hand, databases applicable to the analysis of nuclear facilities have not been constructed because knowledge of reaction rates of complex chemical reactions in severe accidents is currently limited. Accordingly, we have developed the CHEMKEq code based on a partial mixed model with chemical equilibrium and reaction kinetics to decrease uncertainties of the chemical composition caused by the reaction rate. The CHEMKEq code, under mass conservation law, firstly evaluates chemical species obeying the chemical equilibrium model, and then, relatively slow reactions are solved by the reaction kinetics model. Moreover, the CHEMKEq code has a multiplicity of use in evaluations of chemical composition because general chemical equilibrium and reaction kinetics models are also available and databases required to calculation are external file formats. This report is the user's guide of the CHEMKEq code, showing models, solution methods, structure of the code and calculation examples. And information to run the CHEMKEq code is summarized in appendixes.
ion irradiationWakai, Eiichi; Ezawa, Tadashi*; Imamura, Junko*; Takenaka, Tsuyoshi*; Tanabe, Tetsuo*; Oshima, Ryuichiro*
Journal of Nuclear Materials, 307-311(Part.1), p.367 - 373, 2002/12
Times Cited Count：29 Percentile：84.85(Materials Science, Multidisciplinary)no abstracts in English
Hashimoto, Masashi; *; *; *
Radiochimica Acta, 63, p.173 - 177, 1993/00
no abstracts in English
; ; ; Kawakami, Waichiro
Kogai To Taisaku, 21(10), p.987 - 992, 1985/00
no abstracts in English
; ; ; ; ; Yoshida, Kenzo
EIM-82-111, p.27 - 36, 1982/00
no abstracts in English
;
JAERI 1251, 40 Pages, 1977/09
no abstracts in English
; ; ;
Chemistry Letters, 1995(2), p.181 - 184, 1975/02
no abstracts in English
Horiguchi, Naoki; Miyahara, Naoya; Miwa, Shuhei; Osaka, Masahiko
no journal, ,
To evaluate chemical behavior of Iodine and Cesium at reactor cooling system in Boron containing environment derived from BWR control materials, a chemical analysis considering chemical reaction kinetic was conducted. Analytical results were compared with those by a chemical equilibrium calculation. It was found that mole fractions of main Cesium compound CsBO were different between those calculated with and without chemical reaction kinetics in a lower temperature condition. This result indicates the necessity of consideration of the chemical reaction kinetic model for the evaluation of the chemical behavior of Iodine and Cesium.
Hata, Kuniki; Sato, Tomonori; Kaji, Yoshiyuki; Inoue, Hiroyuki*; Taguchi, Mitsumasa*; Seito, Hajime*; Tada, Eiji*; Abe, Hiroshi*; Akiyama, Eiji*; Suzuki, Shunichi*
no journal, ,
no abstracts in English
in reaction cell in triple quadrupole inductively coupled plasma mass spectrometryKazama, Hiroyuki; Konashi, Kenji*; Suzuki, Tatsuya*; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Abe, Chikage*; Nagai, Yasuyoshi*
no journal, ,
Ultratrace analysis technique is important to understand fuel debris in nuclear reactor core after sever accident. Ion-molecule reactions of actinides (
Np, 
Am and 
Cm) in a reaction cell were measured by inductively coupled plasma mass spectrometry (ICP-MS/MS). These nuclides are included in fuel debris. A gas-phase ion-molecule reaction model has been developed to simulate the gas phase reactions in the reaction cell. The results of model simulation are good agreement with the flow rates dependences of experimental data accurately.
