TECHNICAL DESIGN-FEATURES AND ESSENTIAL SAFETY-RELATED PROPERTIES OF THE HTR-MODULE

An HTR-Module power plant consists of standardized reactor units with a power rating of 200 MW each, so that the special, inherent safety features of small high-temperature reactors are also applicable to power plants of any desired power rating. The main design features of the reactor and vital components are given. Special emphasis is layed on a comprehensive survey of design basis accidents and the corresponding accident doses in the environment. It is shown that these doses are much lower than the maximum allowable values given in the German Radiation Protection Ordinance even if it is postulated that the installed filters of the reactor building are not available. Finally, a summary of essential properties and design principles of the HTR-Module is given. These properties and principles were fully approved and accepted by the advisory experts (TÜV) of the German Licensing Authorities in their final assessment report on the conceptual design of the HTR-Module (November 1989). © 1990.