KTA 3206

How KTA 3206 treats fatigue crack growth in a Leak-Before-Break (LBB) argument: the Paris-Erdogan equation in the steady-state region, constants for ferritic and austenitic steels, the NUREG/CR-6176 term for high-temperature water, and a worked example.

Walks through the KTA 3206 seven-step method for break exclusion of nuclear piping: initial crack, fatigue growth, critical through-wall crack length, critical surface crack depth, detectable crack length, allowable crack size and the LBB verdict.