中文摘要：

从温差发电器的瞬态导热数学模型出发，研究空间快堆在发生无保护超功率事故（UTOP）与无保护失流事故（ULOF）情况下温差发电器温度和热电转换效率的变化趋势。结果表明，在空间快堆发生事故时，温差发电器的热力学变化足以保证热电装置和空间快堆的安全性。

英文摘要：

Based on the transient conduction model of thermoelectric generator, the analysis was performed on the temperature and efficiency change of thermoelectric generator under UTOP and ULOF of space fast reactor. The results indicate that the thermodynamic changes of thermoelectric generator can insure the safety of thermoelectric device and space fast reactor in case of the accident.