CALCULATED MODEL OF HIGH-TEMPERATURE CREEP CRACK PROPAGATION UNDER NEUTRON IRRADIATION

Abstract

Using the energy approach, a calculation model was built to determine the kinetics and period of subcritical growth of
cracks in thin-walled structural elements under the action of long-term static loading, elevated temperatures, and neutron
irradiation. The model is applied to determine the residual life of a plate with a through crack of high temperature creep under
neutron irradiation conditions. It was established that neutron irradiation accelerates the growth of creep cracks, and therefore
reduces the residual life of the plate.