Page 29 - Introduction to Nondestructive Testing
P. 29

Power Plant Inspection






                                                                        Periodically, power plants are

                                                                        shutdown for inspection.

                                                                        Inspectors feed eddy current

                                                                        probes into heat exchanger

                                                                        tubes to check for corrosion

                                                                        damage.










                                                                                   Pipe with damage                   Probe


                                                                                                              Signals produced
                                                                                                                   by various
                                                                                                                   amounts of
                                                                                                                    corrosion
                                                                                                                    thinning.
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