The SUDKR System is a precision manipulator for the automated removal of defects inside the surface of the reactor vessel. It comprises the delivery system and intervention manipulator, as well as the visual inspection tool. Once deployed into the vessel from the refueling machine, the manipulator engages telescopic arms that press against the reactor vessel to ensure a secure fit. The grinding device is then manipulated to the defect using precision actuators. Grinding is conducted in 50-micron increments. Integrated radiation-hardened cameras are employed to monitor the operation.
Diakont radiation-tolerant manipulators are utilized for the removal of irradiated test specimens within the RPV. These test specimens are housed within containers that are welded to the inner diameter (ID) surface of the reactor. To retrieve them, it is necessary to perform precision cuts of these welds. Unlike previous, now-obsolete solutions, Diakont’s new manipulator implements technology that eliminates the ingress of welding slag and other foreign materials into the RPV, eliminating the requirement to conduct extra FOSAR operations at the bottom of the RPV. The Diakont manipulator is equipped with a best-in-class D40 radiation-tolerant camera, which provides reliable monitoring of underwater operations in very high-radiation work areas.