Surry steam generator program - final results - evaluation of NDE performance and technical basis for improved ISI and plugging criteria

The principal objectives of the program were to assess the effectiveness of Regulatory Guides 1.83 and 1.121 to (1) define the frequency, extent and procedure for conducting nondestructive inservice inspections (ISIs) of steam generator tubing, and (2) determine tube plugging limits of service-degraded tubing under normal operating and accident loading conditions. To reach these objectives the program utilized a retired-from-service steam generator from the Surry 2 Nuclear Station. Nondestructive (NDE) and destructive examinations of the generator provided information on the accuracy and precision of eddy current (EC) and development inspection methods to detect, characterize and size flaws in steam generator tubing. In addition, burst testing of laboratory and service defected tubing was performed to validate models of remaining tube integrity developed previously. Results are discussed