TAPPI TIP 0402-38:2015

This TIP describes the SAC damage mechanism and its controlling
parameters, based on comprehensive research studies by the power
utility industry in Europe and N. America; boiler components likely
to experience SAC; inspection and testing methods;
fitness-for-service assessment, and general guidelines for
mitigating SAC.

SAC is most effectively found and managed with an
owner-accountable testing and inspection program with formal
analytical and testing practices and procedures, done by mill
personnel and non-destructive testing technicians qualified to find
SAC and monitor its progress over time.