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Effect of secondary flow generated in 90-degree bend upon high-cycle thermal fatigue in a mixing tee
Ohara, Hiroshi; Yuki, Kazuhisa; Hashizume, Hidetoshi; Hosseini, S.M., E-mail: hoha@karma.qse.tohoku.ac.jp
Proceedings of the 3rd annual meeting of Japan Society of Maintenology2006
Proceedings of the 3rd annual meeting of Japan Society of Maintenology2006
AbstractAbstract
[en] In nuclear power plants, there are many T-junctions at which different temperature fluids are mixed. When the fluids with different temperature are mixed, temperature fluctuation in fluids reachs wall and high-cycle heat fatigue occurs. Depending on amplitude and frequency of temperature fluctuation, it could lead to pipe rupture accident at worst. In addition, in case of the T-junction with 90-degree bend at upstream, there is higher risk for pipe rupture accident due to secondary flow which arises in the 90-degree bend. In this study, the effects of temperature fluctuation above the T-junction in case of different distance of 90-degree bend outlet to the T-junction are investigated. (author)
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Japan Society of Maintenology, Tokyo (Japan); 405 p; Jul 2006; p. 82-86; 3. annual meeting of Japan Society of Maintenology; Sendai, Miyagi (Japan); 6-7 Jul 2006; Available from Japan Society of Maintenology, 7F, 2-7-17, Ikenohata, Taito, Tokyo, 110-0008 Japan; 5 refs., 9 figs.
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Miscellaneous
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Conference
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