Numerical simulation research on C-ring of CPR1000 reactor pressure vessel

The seal element of CPR1000 reactor pressure vessel is C-ring , in this paper , five finite element models are established, including practical model, ring model, equivalent cylinder model. Using linear elastic analysis and elastoplastic analysis, each model's load-displacement curve of bearing radial load is obtained, which contains applying loading and unloading process. The result show that, equivalent cylinder model based on the medium diameter can reflect the characteristics of C-ring. At the same time, it can effectively reduce the cost of calculation, and can be used for seal analysis of reactor pressure vessel bolt-flange connecting structure. Analysis also indicates that, the alloy cladding and silver have a great influence on the results. (authors)