HTGR Knowledge Base

Conference Article: Design Features of Gas Turbine Power Conversion System for HTR-10GT

Abstract

The 10MW high temperature gas-cooled reactor (HTR-10) is the first reactor worldwide which has inherent safety feature. The HTR-10, a pebble bed type reactor, reached its first criticality in 2000 and began to operate on full power in 2003. The power conversion system of the HTR-10 is a steam turbine generator system. Based on the success, a new project, the gas turbine power conversion system, was launched recently, which is denoted as HTR-10GT. For the HTR-10GT, the gas turbine direct cycle is utilized instead of steam generator and steam turbine. The HTGR gas turbine cycle is expected to have higher efficiency and better performance theoretically. The arrangement of helium turbine and electric generator is selected as single shaft configuration with identical speed which is designed as 15000r/min. The rotors are supported by active magnetic bearings to avoid the contamination from any lubricant. The reactor core outlet temperature is designed as 750 C and inlet 330 C, and the latter is restricted not to exceed the value by use of a temperature adjustor. The output power is controlled by total mass inside the primary system gradually and by bypass valves for fast changing. This paper presents the main design features and parameters for the HTR-10GT. Meanwhile the main performances and control method are also described.

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Reference:

Proceedings of the Conference on High Temperature Reactors, Beijing, China, September, 22-24, 2004

International Atomic Energy Agency, Vienna (Austria)

HTR-2004, pp:1-12