(The following press release from Southern California Edison was received 
by e-mail and was reformatted. The sender verified the statement.) 
Southern California Edison Conducts Required Testing of Equipment 
ROSEMEAD, Calif., October 19, 2012 — Southern California Edison (SCE) has begun 
required equipment testing using a temporary boiler to produce steam required 
in the non-nuclear portions of the San Onofre Nuclear Generating Station. This 
testing is not part of a plant restart.  
The current testing is required for Unit 2 upgrades completed this past 
January, which included installing a new reactor vessel head. During this 
testing, steam might be visible on the west side of the plant. The temporary 
boiler is being run on diesel fuel.  
The testing is anticipated to last about seven days. During this period, the 
reactor cooling water system will pump water through its normal flow path. The 
pumping energy will heat up and pressurize the reactor water to normal levels.  
These conditions are necessary to conduct the planned testing of the new 
equipment. In accordance with the requirements of the Nuclear Regulatory 
Commission’s (NRC) Confirmatory Action Letter, the reactor will remain shut 
down and the steam generators will not be producing steam to run the power 
Both units of the San Onofre plant are currently safely shut down. Unit 2 was 
taken out of service Jan. 9 for a planned outage. Unit 3 was safely taken 
offline Jan. 31 after station operators detected a leak in a steam generator 
SCE submitted its response to the NRC’s Confirmatory Action Letter on Oct. 4, 
along with its restart plan for Unit 2. Unit 2 cannot be restarted until all 
plans have been approved by the NRC and will remain shut down until the NRC is 
satisfied that it is safe to operate. Unit 3 remains safely shut down for 
continued inspections, analysis and testing.   
For updates, please visit, or follow us on Twitter at and on The San Onofre plant is 
jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and 
the city of Riverside (1.79 percent).  
About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one 
of the nation’s largest electric utilities, serving a population of nearly 14 
million via 4.9 million customer accounts in a 50,000-square-mile service area 
within Central, Coastal and Southern California.  
Media Contact: Media Relations, (626) 302-2255 
Press spacebar to pause and continue. Press esc to stop.