Nuclear power plant with a closed multiple-loop gas coolant circuit

The dimension of the prestressed concrete pressure vessel of the HTR with a closed multiple-loop gas coolant circuit is kept as small as possible by special measures. In each loop several heat exchanger units are supplied by a ring segment-type piping system. This principle is applied to the supply of turbine gas to the recuperators as well as to the supply of the cold, compressed gas to the tube bundles of the recuperators and to the removal of the cold gas from the precoolers. Short stub lines connect the ring segment channels with the corresponding outlets of the gas turbine set. The arrangement of the components may be kept for each increase of power. (DG)