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Journal Articles

Outline of research and development of thermal-hydraulics and safety of Japanese Supercritical Water Cooled Reactor (JSCWR) project

Nakatsuka, Toru; Mori, Hideo*; Akiba, Miyuki*; Ezato, Koichiro; Yasuoka, Makoto*

Proceedings of 5th International Symposium on Supercritical Water-Cooled Reactors (ISSCWR-5) (CD-ROM), 12 Pages, 2011/03

In the thermal-hydraulic area of Japanese Supercritical Water Cooled Reactor (JSCWR) project, the main objective is to provide high-precision heat transfer and hydraulics resistance correlations of supercritical water which are necessary for the conceptual design of the core and fuel. For this purpose, a database was constructed from literature survey and previous research results. The most suitable correlation applied for circular tubes was selected based on the database and the range of application and predictive accuracy were defined. A thermal-hydraulics analysis code has been developed based on large eddy simulation, which is selected for simulation of the heat transfer deterioration, to give detailed information of thermal-hydraulics phenomena in a fuel bundle.

Journal Articles

Assessment of applicability of LES model for heat transfer deterioration

Nakatsuka, Toru; Yoshida, Hiroyuki; Takase, Kazuyuki

Nippon Kikai Gakkai 2009-Nendo Nenji Taikai Koen Rombunshu, Vol.3, p.141 - 142, 2009/09

In the thermal hydraulic design of supercritical water-cooled reactor, it is required to establish a design technique which can precisely predict heat transfer deterioration of supercritical water as the core coolant. The mechanism of heat transfer deterioration has not been figured out yet. In the present study, results of preliminary surveys on several turbulence models are reported. Large eddy simulation shows the most promising results for predictions of the heat transfer deterioration with a high accuracy.

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