In order to analyze the power load-following characteristics of thermionic space reactor power system,TOPAZ-Ⅱ thermionic space reactor system code is established by using the simulation language of reusable hierarchical component model.The influence of Cs steam pressure and electrode gap on the output power is analyzed.The load tracking operation characteristics of thermionic space reactor power supply in orbit under different load changes are analyzed by using the method of core reactivity feedback and external load resistance collaborative control.The results show that the moderator temperature does not change significantly when the steady-state electric power is 5.5 kW and the electric power varies between 0.95 kW and 7.25 kW,and the reactor has self-stability.Beyond this range,the reactor loses self-stability,which is closely related to the positive temperature reactivity feedback of the moderator.
Thermionic space reactor power systemCode developmentLoad-following
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