Linear Versus Nonlinear Irradiation Creep Model for Finite Element Based Stress Analysis of High Temperature Gas Cooled Reactor Core Graphite Component

摘要

Irradiation creep plays a major role in the structural integrity of High Temperature Gas Cooled Reactor Graphite Components. Finite element procedures incorporated with suitable irradiation creep model can be used to simulate the time-integrated structural integrity of complex shapes such as reactor core graphite reflector and fuel bricks. In the present work a comparative study was made to understand the effect of linear and nonlinear irradiation creep model on finite element based stress analysis results. In the present paper the results are demonstrated through finite element simulations of a typical graphite reflector.