Bypass, Containment Bypass

A containment bypass involves a direct release of radioactive material to the environment that bypasses the containment atmosphere. Examples include PWR steam generator tube ruptures (SGTR), which allow radionuclides to be released through the secondary system, or interfacing systems loss-of-coolant accidents (ISLOCA), which allow radionuclides to be released through a breach in a system outside the containment that interfaces with the reactor coolant system (RCS).