Traveling reactor power monitoring system and method for controling retracting a traveling probe

A traveling reactor power monitoring system for moving a traveling probe connected to an edge of a probe cable in a guide tube, comprising:

• a drive control unit configured to move the traveling probe in the guide tube by rotating a motor;
• and
• a proximity switch that generates a 1st preventing retraction signal when the travelling probe is detected by the proximity switch to exist at a predefined stop range in a shielding vessel;
• and
• means for stopping retracting the travelling probe when the 1st preventing retraction signal is generated by the proximity switch, and wiping out the 1st preventing retraction signal by detecting that the probe exists outside of the predefined stop range on the basis of a probe information as a substitute for the 1st preventing retracting signal output by the proximity switch.

A method for controlling retracting a traveling probe connected to an edge of a probe cable in a guide tube, comprising:

• moving a traveling probe in the guide tube by rotating a motor;
• generating, by a proximity switch, a 1st preventing retraction signal by the proximity switch detecting that the probe exists at a predefined stop range in a shielding vessel;
• and
• wiping out the 1st preventing retraction signal by detecting that the travelling probe exists outside the predefined stop range by using a probe information as a substitute for the 1st preventing retracting signal output by the proximity switch.