A novel core geometry is proposed in order to keep the accident temperature of a high-temperature nuclear reactor lower by comparison with a nuclear reactor fitted with an equal-area conventional core. Said geometry is distinguished by shorter guide paths for the dissipation of heat and offers, furthermore, substantial advantages in the component arrangement and in the possibility of selecting the charging mode. As a result, it is also possible for the production costs for a high-temperature nuclear reactor fitted with such a core to be kept substantially lower. <IMAGE>
