Unit 2

Flickr/Tracey Adams

In San Luis Obispo County, Pacific Gas & Electric says it still can’t say when Diablo Canyon will restart sending electricity to California’s grid. The nuclear power plant has been completely offline since mid-October, generating no electricity while workers do maintenance and do repairs.

Flickr/Tracey Adams

Diablo Canyon's Unit 2 reactor was offline Friday evening as Pacific Gas and Electric Company crews fix recently discovered problems on a couple of the unit's backup generators.

According to PG&E, the reactor was shut down Thursday night so that a couple of parts—described as fasteners or bolts—could be replaced.

Crews decided during routine maintenance that the parts were not performing properly. PG&E is required to keep two out of the unit's three backup generators in good running order at all times in case of a power outage at the plant.