The San Onofre Plant & Decommissioning


SCE formally notified the Nuclear Regulatory Commission (NRC) on June 12, 2013 that it had permanently ceased operation of Units 2 and 3 on June 7, 2013. The notification, called a Certification of Permanent Cessation of Power Operations, sets the stage for SCE to begin preparations for decommissioning.

Decommissioning is a well-defined NRC process that involves transferring the used fuel into safe storage, followed by the removal and disposal of radioactive components and materials. Longer term, this process calls for reducing residual radioactivity to a level that supports termination of the NRC license.

Meet Our Decommissioning Team

  • Tom Palmisano, vice president of Decommissioning and chief nuclear officer, is responsible for overseeing all aspects of the decommissioning of the San Onofre Nuclear Generating Station. See bio
  • Manuel Camargo works on strategic planning and is SCE's liaison with the Community Engagement Panel.
  • Liese Mosher is our communications and community outreach manager.
  • Maureen Brown is our public information officer.
  • Jim Madigan is the technical advisor to Tom.
  • Lou Bosch is our shutdown plant manager.
  • Kelli Gallion is our emergency planning manager.

3 Key Facts About the San Onofre Plant

FACT #1: Units 2 and 3 of the San Onofre nuclear plant, located near San Clemente, Calif., were capable of generating 2,200 megawatts of electricity, enough power to serve 1.4 million average homes at any point in time.

FACT #2: Commercial operation of San Onofre Unit 2 began in 1983 and of Unit 3 in 1984. Unit 1 went into service Jan. 1, 1968 and was retired in 1992.

FACT #3: San Onofre is jointly owned by SCE (78.21%), San Diego Gas & Electric (20%) and the city of Riverside (1.79%).

How to Contact Us

  • Telephone: (800) 332-3612
  • E-mail:
  • 24-hour Media Relations Line: (626) 302-2255
  • Community Outreach Manager Liese Mosher, (949) 368-9750

Mailing Address

San Onofre Nuclear Generating Station
P.O. Box 128
San Clemente, CA 92674-0128

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