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PG&E’s Diablo Canyon Power Plant Begins Repairs On Unit 2

Release Date: August 19, 2008
Contact: PG&E External Communications (415) 973-5930

AVILA BEACH, CA – The Diablo Canyon Power Plant has begun a brief outage on Unit 2 to complete repairs after a transformer fire caused the unit to safely shut down on August 17.

Diablo Canyon personnel, along with PG&E Transmission Substation Maintenance and Construction (TSM&C) crews, will be replacing the failed transformer, as well as some adjacent equipment that was damaged during the event.

Pacific Gas and Electric Company (PG&E) declared an Unusual Event (UE) at the plant at 12:12 a.m. on August 17, after a transformer failure caused a fire outside the plant's turbine building. An Unusual Event is the lowest of four emergency action levels in the NRC-required emergency response plan for nuclear power plants. It means there is a minor problem or potential problem at the plant, but there is no impact to public health and safety.

Diablo Canyon firefighters extinguished the fire at 12:26 a.m., and the UE was terminated at 2:31 a.m. The fire did not pose any threat to the nuclear reactors and no personnel were injured. During the event all plant safety systems operated as designed, automatically bringing Unit 2 to a safe shutdown.

There was no release of radioactive material to the environment from this event, as indicated by sensitive plant radiation monitors.

Diablo Canyon Power Plant provides enough electricity to meet the needs of more than 3 million northern and central California homes, and is located approximately 12 miles southwest of San Luis Obispo, CA, which is about 220 miles south of San Francisco and 200 miles north of Los Angeles.

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