Reinforced concrete inspection for nuclear power plants

The concrete degrading processes which may potentially affect the reinforced concrete structures of a nuclear power generation facility during and beyond its original design life have been evaluated. The task was undertaken in consideration of the feasibility of extending the life of nuclear power plants beyond their current license expiration dates. Following the identification of deterioration mechanisms which are expected to occur, an inspection system was developed to assess and document the condition of the reinforced concrete components during their service life. Twenty-eight out of thirty-nine degradation modes are deemed likely to affect Surry Unit One's reinforced concrete structures. The majority of these modes are visually evident in their incipient stages. Currently available nondestructive testing methods were assessed to determine their applicability to detect modes which are not visually evident or to determine the extent of deterioration due to these modes. It was found that many nondestructive testing methods are currently lacking in reliability, potability, or ease of application