In connection with the HHT-Project, the Swiss Federal Institute for Reactor Research has performed a study of a 1640-MWth HTR-plant incorporating a non-integrated indirect cycle gas turbine with two-stage intercooling, as a possibility of simplifying and reducing the cost of the HHT-Demonstration plant. In this paper, the plant design is described and compared with the HHT-demonstration plant (a CCGT integrated plant with single stage intercooling). Also included is an evaluation of the various advantages and disadvantages of this design together with the presentation of some of the sensitivity results.

In connection with the HHT-Project, the Swiss Federal Institute for Reactor Research (EIR) has performed an optimization analysis of the HHT-3000 MWth commercial plant with a closed-cycle helium turbine one-loop concept. This paper gives first a description of the analyzed plant with general considerations of optimization techniques followed by the presentation of results of optimization and sensitivity calculations.

In connection with the HHT-Project, the Swiss Federal Institute for Reactor Research has performed an Optimization Analysis of the HHT-1640 MWth Demonstration Plant with a Closed Cycle Helium Turbine One Loop Concept with Intercooling. This paper gives a description of the analysed plant and the development of the optimization techniques utilized, followed by the presentation of results of both optimization and sensitivity analysis calculations.