A walkthrough of the latest ASME BPVC Section XI Appendix Y models for fatigue crack growth and stress-corrosion cracking in austenitic, ferritic and nickel-base alloys, with a code-based online calculation guide.
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.
An introduction to Leak-Before-Break (LBB): what it means, where it applies and where it does not, the main codes, the three analysis steps, and a nuclear piping example.