The operating regimes and basic control principles of SNPS Topaz

The basic operating regimes of space nuclear power system (SNPS) Topaz are considered. These regimes include: prelaunch preparation and launch into working orbit, SNPS start-up to obtain desired electric power, nominal regime, and SNPS shutdown. The main requirements for SNPS at different regimes are given, and the control algorithms providing these requirements are described. The control algorithms were chosen on the basis of theoretical studies and ground power tests of the SNPS prototypes. For SNPS of this type control algorithm providing the required thermal state of the cesium vapor supply system and excluding any possibility of discharge processes in current conducting elements is the most expedient at the start-up regime