Complex sentence: Unit 2 at the Calvert Cliffs nuclear power plant was shut down on September 5,2013 after a malfunction during testing, but was re-opened September 10,2013 after the required maintenance was performed.
Split into simpler sentences: Unit 2 at the Calvert Cliffs nuclear power plant was shut down on September 5,2013 after a malfunction during testing. It was re-opened September 10,2013 after the required maintenance was performed.