Inspection of shell of fuel element
Sensor unit to inspect shell of fuel element was developed and delivered to the customer. Eddy current sensors rotate around shell of cylindrical form to reveal surface cracks as small as 50 micrometers in depth and 0.2 mm in diameter or 5 mm length. The inspected shell moves in lengthwise direction at speed up to 200 mm/s. Probability of detection is 95%. The sensor unit has shown good performance and was implemented into the automatic inspection system.