Due to official directives in nuclear power plants (KTA 32014), periodic testing of certain components, e.g. screwed connections at the reactor pressure vessel, is compulsory. This includes the bolts, their piston and thread as well as the nuts and the tapped blind hole. Due to the hampered test conditions, fully automatic manipulators are used, which enable qualified testing of the component and pictorial documentation via C-scan. The entire test equipment was developed and produced by DELTA TEST.