Nuclear power station with closed coolant gas circuit for generating process heat

摘要

The invention relates to a nuclear power station for generating process heat in a helium-cooled high-temperature reactor, the said heat being extracted by means of a plurality of He/He heat exchangers. These heat exchangers are arranged around the high-temperature reactor in the central cavern of a reinforced concrete pressure vessel. The object of the invention is to design the He/He heat exchangers in such a way that the heat exchanger tubes are accessible for inspection and blanking-off work without special protective measures and a great amount of time. This is achieved by each He/He heat exchanger comprising a cluster of U-tubes arranged in two coaxial annular spaces and surrounding a tube-free central channel, and also comprising an annular inlet header and a central tubular outlet header. The two headers of each He/He heat exchanger are installed in an explosion-proof steel cylinder, mounted on the reinforced concrete pressure vessel, and each are connected to a laterally extending supply line and discharge line, respectively. Arranged above the two headers in each steel cylinder is the primary helium blower with drive motor for the leg of the circuit concerned.