Air Diffusion Analysis for Experimental Set NACOK and HTR-Module

[Automatically extracted and translated] The modular high temperature gas cooled reactor is of inherent safety. In a hypothetical accident like loss of active heat sinks, the reactor will shut down automatically owing to the negative temperature feedback of the moderator, the decay heat will be transferred to the environment via passive mechanisms like heat conduction and radiation. Because of low power density of the reactor core, huge heat capacity of the reactor graphite, the peak temperature of the core is less than 1600 °C during such a severe accident, that is impossible to lead catastrophic release of the radioactivity. On the basis of the inherent safety, it is carried out a further discussion about whether the reactor is impossible to release large amount of radioactivity certainly in any situation. The discussion enhances the research of air ingress accident.