The Solubility and diffusion coefficient of helium in uranium dioxide
中島 邦久; 芹澤 弘幸; 白数 訓子; 芳賀 芳範; 荒井 康夫
Nakajima, Kunihisa; Serizawa, Hiroyuki; Shirasu, Noriko; Haga, Yoshinori; Arai, Yasuo
The solubility and diffusion coefficient of helium in the single-crystal UO$$_{2}$$ samples were determined by a Knudsen-effusion mass-spectrometric method. The measured helium solubilities were found to lie within the scatter of the available data, but to be much lower than those for the polycrystalline samples. The diffusion analysis was conducted based on a hypothetical equivalent sphere model and the simple Fick's law. The helium diffusion coefficient was determined by using the pre-exponential factor and activation energy as the fitting parameters for the measured and calculated fractional releases of helium. The optimized diffusion coefficients were in good agreement with those obtained by a nuclear reaction method reported in the past. It was also found that the pre-exponential factors of the determined diffusion coefficients were much lower than those analyzed in terms of a simple interstitial diffusion mechanism.
使用言語 : English
掲載資料名 : Journal of Nuclear Materials
: 419
: 1-3
ページ数 : p.272 - 280
発行年月 : 2011/12
出版社名 : Elsevier
特許データ :
論文URL :
キーワード : no keyword
使用施設 :
広報プレスリリース :
受委託・共同研究相手機関 : 文部科学省
登録番号 : AA20110019
抄録集掲載番号 :
論文投稿番号 : 11727
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Materials Science, Multidisciplinary
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