The Nuclear Regulatory Commission announced Monday that it is conducting a special inspection at the Calvert Cliffs nuclear power plant in southern Maryland after an electrical malfunction caused the two reactors there to shut down.

The plant, which restarted both reactors over the weekend, suffered the shutdown after snow and ice during a storm Jan. 21 apparently affected a ventilation louver filter and caused a short circuit. After the electrical supply system shut down, so did several plant systems and components that rely on electricity, the nuclear regulatory agency said Monday.

Those components included motors for moving control rods and water circulating pumps for the Unit 2 reactor, the agency said. The main turbine control circuit for the Unit 1 reactor also malfunctioned after the electricity loss.