Quicker SG tube inspection

3 September 2003

Zetec has launched the Dual Probe Control System (DPCS) to inspect steam generator tubing. By combining the features of two separate controllers and power supplies the DPCS provides a small integrated system with minimum cabling to streamline eddy current testing for cracks and flaws.

For high speed inspections, the DPCS can support up to two of Zetec's new High-Speed, High Torque MRPC Motor Units at 2400 rpm. This speed improvement allows the probes to be pulled at nearly three times faster than the standard 9D Motor Units that spin at 900 rpm. Torque is important to maintain a constant rotation speed.

Zetec has also introduced a Tubular Drive Unit System to allow MRPC inspections in more restricted tubing. For instance, this system is designed to extend through both square bends in steam generator tubing. The drive shaft resides within a solid nylon "pushable" extension shaft and enables faster insertions compared to beaded shaft technology. The drive unit resides within the conduit section directly ahead of the probe pusher wheels.

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