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Conference Article: The NACOK experiment on natural convection of air through the core

Froehling, W.; Hohn, H.; Kugeler, M. (Forschungszentrum Juelich GmbH (Germany)); Sun, Y.; Zhang, Z. (Institute of Nuclear Energy Technology, Beijing (China))

Abstract

KFA is setting up an experiment to study the ingress of air into the core, with the subsequent formation of an airflow driven by natural convection, for the hypothetical accident of a complete rupture of the coaxial hot gas duct. The experiment will have an active height for the natural convection of 7,50 m and a maximum temperature of 1,200 deg. C. The aim aims are to determine the onset time of the convection depending on various parameters, the mass flow and the locally dependent corrosion phenomena caused by the draft. By this means the theoretical models can be validated. The layout of the experiment as well as theoretical investigations to predict the expected performance are reported.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Technical committee meeting on response of fuel, fuel elements and gas cooled reactor cores under accidental air or water ingress conditions. Beijing (China). 25-27 Oct 1993
International Atomic Energy Agency, Vienna (Austria)
IAEA-TECDOC--784, pp:55-61