December 27, 2012 – Federal regulators have sent Southern California Edison a new set of detailed questions that will help them evaluate the feasibility of a partial restart of the shuttered San Onofre nuclear plant. The plant, which once supplied enough power for about 1.4 million homes, has been out of service for close to a year because of unusual wear on steam generator tubes that carry radioactive water. Edison has requested permission to restart one of two reactor units at the plant and run it at 70% capacity for five months. The company provided analysis to show that the lower power level would alleviate the conditions that caused the tubes to vibrate excessively and knock against support structures and adjacent tubes.
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