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.