Workers at San Onofre nuclear plant have begun plugging tubes in Unit 2 steam generators, Southern California Edison (SCE) said Wednesday, February 15, 2012.

Both [Unit 2 and Unit 3] reactors are currently shut to address problems with the steam generators and no return date has been set for either reactor, said a spokesman for SCE.

The Unit 2 steam generators were replaced in 2010 and the generators in Unit 3 were replaced last year.

See details: SCE begins plugging tubes at San Onofre 2 reactor in Calif – Reuter 2/15/2012