An engineering fracture mechanics analysis of the Pilgrim I nozzle-to-pressure vessel weld discontinuities☆

Abstract The influence function method for calculation of stress intensity factor K I ( a ) is applied to the case of a semicircular surface crack, of radius a , used to model a discontinuity revealed by in-service inspection of a nozzle-to-shell weld in the Pilgrim I pressure vessel. Results of the analysis are discussed in detail.