Nuclear power generation VHTR reactors

The solutions in physics and design of SFR and VHTR (HTGR) were discussed in the first part of the chapter. The second part of the chapter deals with the innovative approaches to development of naturally safe fast reactors with a closed fuel cycle, including LFR, which is treated as the main line in establishment of large-scale nuclear power. The other three reactor systems selected for the Generation IV Project are briefly discussed below. 

Future nuclear reactors are expected to be further progressed in terms of safety and reliability, proliferation resistance and physical protection, economics, sustainability (GIF, 2002). One of the most promising nuclear reactor concepts of the next generation (Gen-IV) is the VHTR. Characteristic features are a helium-cooled, graphite-moderated thermal neutron spectrum reactor core with a reference thermal power production of 400-600 MW. Coolant outlet temperatures of 900-1 000°C or higher are ideally suited for a wide spectrum of high temperature process heat applications. 

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