Eddy-current nondestructive testing of turbine generators. Final report
Technical Report
·
OSTI ID:6137207
This project seeks to develop improved eddy current techniques for the inspection of turbine generator components. The physics of eddy current nondestructive testing are described, using a largely intuitive and experimental approach. Near-optimal transducers, intended for use with a standard commercially available eddy current test instrument, are described in detail. The intended application, in-service inspection of turbine-generators (bore holes, blades, and retaining rings), includes both magnetic and nonmagnetic materials and thus requires different transducer designs. Test results provide experimental validation of the analytical studies. A manually operated experimental system was assembled using strip chart recorder output, and a large number of calibrating artifacts (drilled holes and EDM slots and notches) were provided, so that system performance could be demonstrated in the laboratory. Details are given of both the system and its performance. The system has been tried out under both factory and in-service inspection conditions. 17 refs., 41 figs., 3 tabs.
- Research Organization:
- General Electric Co., Schenectady, NY (USA). Corporate Research and Development Dept.
- OSTI ID:
- 6137207
- Report Number(s):
- EPRI-CS-4387; ON: TI86920136
- Country of Publication:
- United States
- Language:
- English
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