Control rod issue shuts down nuclear power plant

A control rod at the 1,735 MWe Calvert Cliffs nuclear power plant in Maryland unexpectedly inserted into the Unit 1 core, causing a drop in power generation August 12. The unit has been shut down while workers look into the cause.

Unit 2 continues to operate at full power. There is no word on when Unit 1 will return to service. There is no risk to the public due to the plant’s redundant safety systems, according to plant owner Constellation Energy Nuclear Group.

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