Study on Application of Green’s Function Method in Thermal Stress Rapid Calculation

This paper presents a quick and accuracy thermal stress calculation method,the Green’s Function Method,which is a combination of finite element method and numerical algorithm method.Thermal stress calculation of Safe Injection Nozzle of Reactor Coolant Line of PWR plant is performed with Green’s function method for heatup and cooldown thermal transients as a demonstration example,and the result is compared with finite element method to verify the rationality and accuracy of this method.The advantage and disadvantage of the Green’s function method and the finite element method are also compared.