**5. Samples research**

Interconnections exist in the multi-physics process and software structure in reactor core. For solving according to physics-mathematics model, various core software has been developed. There are two main ideas for developing these procedures. One is to make full use of the existing programs in the world. The other is to redesign and program the program structure and function. The key parallel algorithms of single discipline sample program CORTH, KYLIN2, K-MOD, and Hydra are identified and programmed, which come from the typical examples of the reactor core system, computing work through the research career of the author.
