Calvert Cliffs Reactor Restarts

Wednesday, May 7, 2014 @ 01:05 PM gHale


The Calvert Cliffs nuclear power plant restarted after its reactor automatically shut down last week after a malfunction at the facility near Lusby, MD.

Operator Exelon Corp. said Monday the Unit 1 reactor returned to full power at 9 a.m. Sunday. The facility’s second reactor continued to run during the outage, one of three incidents in the last eight months in which one or both of the units had unplanned shutdowns.

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The malfunction that forced the shutdown occurred during electrical breaker testing, Exelon said. The Nuclear Regulatory Commission (NRC) said the safety systems functioned as designed during the shutdown.

During planned electrical breaker testing, Calvert Cliffs Nuclear Power Plant Unit 1 automatically shut down at 10:15 Thursday morning because of a malfunction during the testing, officials said.

“The plant is designed to respond if it sees anything out of the ordinary,” said Kory Raftery, plant spokesman.

Operators are working to determine the cause of the shutdown before they take actions to restore Unit 1 to full power. Until then, the plant’s second unit remains at full power. The shutdown should not have an impact on electrical service to businesses and homes in the region, the press release states.

“All safety systems responded as designed and the plant came off-line as expected,” the release said. “The plant is in a safe and stable condition.”



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