On the analysis of cracks in nuclear piping

In this paper a criterion is discussed to eliminate the unrealistic hypothesis of catastrophic failure in a nuclear grade pipe. Experimental evidence is given to sustain a design curve based upon the SHA (Strain Hardening Approach) method. The validity of the approach is discussed with particular reference to the problem of crack stability. Safety margins are demonstrated, showing that in general nuclear piping loads are much lower than the critical ones postulated herein