Conducting a welding repair within the reactor environment is not something that should be rushed. To alleviate the dose hassles associated with using a personnel and lead shielding, Diakont has perfected a robotic system for performing remote welding in high-radiation areas.
The principal component of the system is the SDC Robot, which functions as both the delivery vehicle and the tool. It is a radiation-hardened magnetic crawler, resembling the form factor of a snake. It is umbilical-deployed near the subject position, and then crawls along a horizontal, vertical, or curved surface to the work site. It can navigate through bores as narrow as 2.1” and over bumps at high as 0.4”. Once the SDC arrives at the subject position, an onboard radiation-tolerant camera deploys to survey the area, and facilitate operation. Then a grinding wheel preps the surface for welding. Following the automated welding process, an EMAT UT array performs a volumetric exam on the weld to validate results and thickness.