The Characteristic Study Of Nuclear Power Passive Safety

The research of passive safety is an important task to make safe use of nuclear energy peacefully and further develop nuclear energy. The aspect of passive safety is studied in this thesis.First, this thesis reviews the development of nuclear safety concept. Some next generation reactors in the world and their passive safety designs are analyzed and summarized.The RELAP5 code is a great thermal-hydraulic transient analysis code at present, and it is as the tool of studying passive safety in this thesis. At the same time, the RELAP5 code and its use are introduced in this thesis in detail.In the thesis, the RELAP5 code is made use of simulating and calculating the passive core makeup tank (CMT) of the next generation reactor AC-600 of our country. And the calculative results based on the comparative character of the system are compared with the experimental results in the corresponding experimental devices of AC-600 makeup water tank in Nuclear Power Institute of China (NPIC). Finally the thesis conclusion summarized is that the makeup water passively injected to the reactor coolant system by the core makeup tank depending on the gravity is viable in the middle and small LOCAs.