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23 February 2007 -- The largest nuclear power plant in the United States has been place on tighter surveillance because of continued safety issues in various areas at the 3,850 MW plant.
The Nuclear Regulatory Commission (NRC) has determined that an inspection finding at the Palo Verde Nuclear Generating Station regarding operability of emergency diesel generators is of "white" or low to moderate safety significance. The facility is operated by Arizona Public Service Co. (APS), near Wintersburg, Ariz.
"This finding was caused by performance deficiencies similar to others noted by NRC at Palo Verde since 2004," Region IV Administrator Bruce Mallett said. "The NRC will determine the appropriate follow-up actions to ensure performance improvements at Palo Verde."
Following testing failures on July 25 and Sept. 22, an NRC special inspection identified problems in an electrical relay that rendered the emergency diesel generator non-functional for approximately 18 days during 2006.
Earlier this year, APS announced a new Chief Nuclear Officer who would assume responsibilities at the troubled plant. Randy Edington said his service at the Palo Verde would focus on bringing the plant back to achieving top industry performance.
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