Numerical Simulation of the Stress Distribution for Fast Burst Reactor Under Pulsed Operation

A two-dimension model based on China Fast Burst Reactor - II （CFBR-II） is built to analyze the stress responding of the components in fast burst reactor while the reactor is operated in burst model. The relative neutron flux distribution of the model is calculated by M.C （Monte Carlo） method. A thermal load function is driven to replace the solution of the kinetic equation. The results of experiment and neutron flux calculations are employed in the function. The stress distribution of main components of the reactor is calcu-lated with the finite element method in certain thermal load status. Because of the accurate geometry descrip-tion of the model and the introducing of experimental values, this method is more reasonable compared to the coupled method, especially for a complex model such as CFBR-Ⅱ.