Analysis of Abnormal Signals in the Inspection of Reactor Rod Cluster Control Assembly

The nondestructive examination of rod cluster control assembly is important to nuclear safety. There were many analyses about the typical defects of wear, swelling and crack, but little was introduced about the abnormal signals caused by the acquisition equipment and on-site environment which also occured in practical applications. This paper introduced the working principle of the acquisition equipment, analyzed three kinds of typical abnormal signals in the process of on-site inspection, found out its cause and had certain reference value for the debugging and troubleshooting of the equipment.