DPS-DOUBLE PUSHER SYSTEM FOR PUSHING TWO EDDY CURRENT PROBES SIMULTANEOUSLY THROUGH TWO STEAM GENERATOR TUBES OF NUCLEAR POWER PLANTS

摘要

Purpose of double pusher system is eddy current inspection of steam generators tubes of WER Nuclear Power Plants. Its function is to enable pushing and pulling of two probes simultaneously through the steam generator tube. The device consists of two technically equal segments, only one segment is shown in the picture. Probes are brought to angle guideline (7) and by means of mechanism and wheels system (8) are further pushed through guideline (4) , where a calibration block is situated. System of passing of the probe is presented in broken line in the picture. The mechanism consists of a number of cogwheels and rubber wheels (8) .