Eddy Current Inspections on RPV bolts and in RPV flat bottom holes
Because of the size of the inspection objects and the inaccessibility of the inside thread a mechanised inspection is necessary.
The especially developed bolt inspection tables for the inspection of the thread and shaft regions enable a secured inspection.
By the outline guidance of the thread an optimum sensor position is guaranteed, whereas the inspection of the shaft region provides an automatic feed that ensures the complete inspection of the total shaft surface.
In case of the flat bottom hole thread inspection an optimum sensor guidance is obtained by a motorised compulsory guidance in the thread. Path sensors allow a detailed eddy current and path record and a resulting well analysable presentation of the C-scan.