Primary water stress corrosion cracking (PWSCC) of Alloy 600 materials and Alloy 182/82 welds has become a top industry concern for PWR plants. There are many locations within the reactor coolant pressure boundary (RCPB) that can contain Alloy 600 base/weld metal that can be susceptible to PWSCC overtime.

A repair leak can result in weeks of unplanned outage time and millions of dollars in cost.