Evaluation of sampling plans for in-service inspection of steam generator tubes: Modeling of eddy-current reliability data, analytical evaluations, and initial Monte Carlo simulations
The Steam Generator Group Project (SGGP) was a multi-task effort using the retired-from-service Surry 2A pressurized water reactor steam generator as a test bed to investigate the reliability and effectiveness of in-service nondestructive eddy current (EC) inspection equipment and procedures. The information that was developed provided the technical basis for recommendations for improved in-service inspection methods and tube plugging criteria for steam generators. This report is Volume 1 of two volumes documenting the results of analyses performed to evaluate and compare candidate sampling/inspection schemes for in-service inspection of steam generator tubes. The estimated EC inspection reliability determined from round robin examination of the Surry generator was used to guide the selection of input parameters for these analyses. Analytical evaluations of candidate sampling/inspection schemes based on the ranges of probability of detection and probability of exceeding the EC plugging limit, as estimated from the round robin data, are described. Monte Carlo simulation analyses designed to supplement the analytical results and test key assumptions are presented. Finally, conclusions and recommendations for further study are presented. 2 refs., 30 figs., 27 tabs.
- Research Organization:
- Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering; Battelle Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5960872
- Report Number(s):
- NUREG/CR-5161-Vol.1; PNL-6462-Vol.1; ON: TI89014833
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220200* -- Nuclear Reactor Technology-- Components & Accessories
BOILERS
DATA
DEFECTS
DETECTION
EDDY CURRENT TESTING
ELECTROMAGNETIC TESTING
FAILURES
INFORMATION
INSPECTION
MATERIALS TESTING
MATHEMATICAL MODELS
MONTE CARLO METHOD
NONDESTRUCTIVE TESTING
NUMERICAL DATA
PROBABILITY
RECOMMENDATIONS
RELIABILITY
STATISTICAL DATA
STEAM GENERATORS
TESTING
TUBES
VAPOR GENERATORS