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Fusion Science and Technology
Latest News
A more open future for nuclear research
A growing number of institutional, national, and funder mandates are requiring researchers to make their published work immediately publicly accessible, through either open repositories or open access (OA) publications. In addition, both private and public funders are developing policies, such as those from the Office of Science and Technology Policy and the European Commission, that ask researchers to make publicly available at the time of publication as much of their underlying data and other materials as possible. These, combined with movement in the scientific community toward embracing open science principles (seen, for example, in the dramatic rise of preprint servers like arXiv), demonstrate a need for a different kind of publishing outlet.
Tomohiro Kinjyo, Masabumi Nishikawa
Fusion Science and Technology | Volume 46 | Number 4 | December 2004 | Pages 561-570
Technical Paper | doi.org/10.13182/FST04-A591
Articles are hosted by Taylor and Francis Online.
This paper proposes a model to explain tritium release behavior of an irradiated Li4SiO4 sample made by Forschungszentrum Karlsruhe. The release curves were obtained in a series of experiments carried out using out-pile temperature programmed desorption techniques in the Kyoto University Reactor (KUR). Tritium release curves obtained for different purge gas compositions (N2, N2 + H2, N2 + H2O) were compared for selection of suitable conditions to determine the apparent diffusivity of tritium in a crystal grain of Li4SiO4.In the model formation, some mass transfer steps in the bulk of the crystal grain and those on the surface of the grain were taken into account, which were diffusion of tritium in the grain, adsorption and desorption of water on the surface of the grain, two types of isotope exchange reactions, and water formation reaction by the addition of hydrogen to the purge gas.Diffusivities of tritium in the crystal grain of Li4SiO4 were estimated using a curve-fitting method applied to the release curve obtained when the irradiated sample was purged by nitrogen with water vapor because of the fastest tritium release rate observed.
