Abstract: In the chang’e-4 project, China used domestic radioisotope heat sources to provide energy for aerospace projects for the first time. In order to ensure the safe implementation of the mission, it is necessary to carry out nuclear safety regulation on the whole process from development to launch, while the domestic mature safety regulation experience on such domestic radioisotope heat source products is insufficient. Starting with the analysis of the radioactive characteristics of heat source, this paper investigates the existing nuclear safety regulatory requirements at home and abroad, especially the regulatory data of the International Atomic Energy Agency, Russian Federation and the United States. This paper also disassembles the regulatory links of heat source transportation, selects and analyzes the specific requirements suitable for the safety regulation of isotopic heat source transportation in China.

Key words: isotope heat source, transportation, nuclear safety regulation