Southern California Edison to Propose Seismic Studies Related to the San Onofre Nuclear Generating Station

April 12, 2011

Media Contact: Gil Alexander, (626) 302-2255

ROSEMEAD, Calif., April 12, 2011 – Southern California Edison (SCE) plans to file a funding authorization request with the California Public Utilities Commission on Friday, April 15, 2011, for  ongoing seismic studies related to the San Onofre Nuclear Generating Station. The research is designed to increase scientific understanding of seismic and tsunami conditions that could affect the plant.

SCE is requesting $64 million for the seismic program and studies, which represents less than 1 percent of current overall rates.

“We have been planning the seismic and tsunami studies for several months,” said SCE Chief Nuclear Officer Pete Dietrich. “Following the recent tragic natural disasters in Japan, we re-evaluated and enlarged the scope in order to further increase the scientific information we could obtain.”

The new studies would employ enhanced data gathering and analysis technologies capable of providing a deeper, more complete assessment. The studies would include:

  • Preparing an updated tsunami hazard analysis.
  • Conducting 2-D and 3-D reflective mapping offshore and additional onshore evaluations.
  • Reprocessing and reanalyzing existing data, using more modern digital and numerical computer processes.
  • Supplementing existing geodetic and seismological networks.

Ownership of the San Onofre Nuclear Generating Station

  • SCE (78.21 percent)
  • San Diego Gas & Electric (20 percent)
  • 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.

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Southern California Edison to Propose Seismic Studies Related to the San Onofre Nuclear Generating Station