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Conference Article: Steam generator design and development for a helium-cooled modular HTR

Dumm, K.; Zipper, E. (Interatom GmbH, Bergisch Gladbach (Germany)); Keintzel, G. (L. and C. Steinmueller GmbH, Gummersbach (Germany))

Abstract

A modular helium cooled high temperature reactor system with a thermal output of 200 MW per reactor has been developed by the KWU group for cogeneration of electricity and process steam. For this system a steam generator producing superheated steam of 190 bar, 530 deg. C is under development in cooperation with the component supplying industry. The steam generator is heated by helium of 60 bar pressure and 700 deg. C inlet temperature. The design of the cross-counterflow helical tube bundle steam generator will be described. Thermal hydraulic aspects and helium flow distribution problems are considered. Special attention is paid to the interaction of the tube bundle with the steel pressure vessel which serves as the primary system boundary. The presented design is to a large extend supported by operational experience from a 10 MW steam generator prototype which is in operation in the Interatom test facility KVK at helium temperatures even up to 900 deg. C. Some test results and their application to the 200 MW steam generator will be presented.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
Specialists' meeting on technology of steam generators for gas-cooled reactors Winterthur (Switzerland) 9-12 Mar 1987
International Atomic Energy Agency, International Working Group on Gas-Cooled Reactors, Vienna (Austria)
IWGGCR--15, pp:115-123