A nuclear reactor control rod system, comprising: plurality of control rod drive systems (CRDM), each associated with a control rod assembly, at least some of said control rod drive systems having a lift coil, a moveable gripper and a stationary gripper, with the control rod assemblies being arranged in groups with each group comprising a plurality of control rod assemblies, and a control rod control system for controlling the movement of said control rod drive systems (CRDM), said control rod control system being adapted to receive electrical power from an electrical power source, and including a moving unit structured to control multiplexed electrical power to the lift coils of the plurality of the control rod assembly drive rod drive systems (CRDM); a plurality of selecting units structured to respectively receive the electrical power from the moving unit and communicate the electrical power from the moving unit to the corresponding lift coils of the corresponding control rod drive systems (CRDM), and a logic unit structured to coordinate electrical power to the lift coils, the moveable grippers and the stationary grippers of the plurality of control rod drive systems (CRDM); wherein each of the moving unit, the selecting units and the logic unit is respectively housed in a separate electrical cabinet, characterized in that said selecting units respectively receive electrical power through a corresponding first power control module within each selecting unit and selectively communicate the electrical power from the corresponding first power control module to corresponding moveable grippers of the corresponding control rod drive systems, and respectively receive electrical power through a corresponding second power control module within the selecting unit and selectively communicate the electrical power from the corresponding second power control module to corresponding stationary grippers of the corresponding control rod drive systems (CRDM), and each selecting unit controls at least two groups of control rod assemblies with each of the two groups of control rod assemblies controlled separately by the corresponding selecting unit. plurality of control rod drive systems (CRDM), each associated with a control rod assembly, at least some of said control rod drive systems having a lift coil, a moveable gripper and a stationary gripper, with the control rod assemblies being arranged in groups with each group comprising a plurality of control rod assemblies, and a control rod control system for controlling the movement of said control rod drive systems (CRDM), said control rod control system being adapted to receive electrical power from an electrical power source, and including a moving unit structured to control multiplexed electrical power to the lift coils of the plurality of the control rod assembly drive rod drive systems (CRDM); a plurality of selecting units structured to respectively receive the electrical power from the moving unit and communicate the electrical power from the moving unit to the corresponding lift coils of the corresponding control rod drive systems (CRDM), and a logic unit structured to coordinate electrical power to the lift coils, the moveable grippers and the stationary grippers of the plurality of control rod drive systems (CRDM); wherein each of the moving unit, the selecting units and the logic unit is respectively housed in a separate electrical cabinet, characterized in that said selecting units respectively receive electrical power through a corresponding first power control module within each selecting unit and selectively communicate the electrical power from the corresponding first power control module to corresponding moveable grippers of the corresponding control rod drive systems, and respectively receive electrical power through a corresponding second power control module within the selecting unit and selectively communicate the electrical power from the corresponding second power control module to corresponding stationary grippers of the corresponding control rod drive systems (CRDM), and each selecting unit controls at least two groups of control rod assemblies with each of the two groups of control rod assemblies controlled separately by the corresponding selecting unit.