HTGR Knowledge Base

Conference Article: Design of indirect gas turbine cycle for a modular high temperature gas cooled reactor

Abstract

This paper describes a design of the indirect gas turbine cycle for the 200MWt pebble bed MHTGR. In the design, the helium out of the Intermediate Heat eXchanger (IHX) is extracted to a small RPV cooling system. The gas flows through a small RPV recuperator and is cooled down, then it is used to cool the RPV. The whole primary circuit is integrated in a pressure vessel. The core inlet/outlet temperatures are 550 deg. C/900 deg. C, which can supply a gas heat source of 500 deg. C/850 deg. C in the secondary side. The heat source could be used to drive a nitrogen gas turbine cycle and a plant busbar electricity generation efficiency of about 48% is estimated. The thermodynamic calculation, preliminary design of the system components, and the important accident analysis are described in this paper.

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Reference:

Technical committee meeting on design and development of gas cooled reactors with closed cycle gas turbines. Beijing (China). 30 Oct - 2 Nov 1995.

International Atomic Energy Agency, Vienna (Austria)

IAEA-TECDOC--899, pp:85-93