Problem at nuclear plant investigated
Federal inspectors are investigating the failure of an emergency generator at the San Onofre Nuclear Generating Station during three tests in late December.
The diesel generator is one of two that provide electricity to safety systems in the event of a power outage at the plant. Emergency generators are tested monthly.
Inspectors from the U.S. Nuclear Regulatory Commission arrived at San Onofre on Tuesday and will spend several days looking at what caused the failure and how plant managers responded.
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