Study on Releasing Critical Current of Movable Armature of Control Rod Drive Mechanism

Based on the working principle of the releasing critical current of CRDM movable armature, academic analysis and experimentation were combined to study the relationship between releasing critical current and electromagnetic force. Some influencing factors were analyzed by investigation tests about the non-confirmation of movable armature releasing critical current. In conclusion, a new proper acceptance criterion and some improving advice of CRDM movable armature releasing critical current were proposed.