Nuclear power unit sets record at 518 straight operational days

Unit 2 at Arizona Public Service’s (APS) Palo Verde Nuclear Generating Station recorded the best performance in plant history beginning with its last refueling outage in spring 2011 to the current scheduled maintenance and refueling outage, the utility said Oct. 11. The 1,340 MW unit operated for a plant-record 518 consecutive days.

The previous Palo Verde record for consecutive days online, also held by Unit 2, was 515, completed in 1999. Unit 1 and 3’s longest consecutive runs are 502 and 509 days. Palo Verde’s units are on an 18-month refueling cycle, with two refueling outages scheduled each year – one in the spring and another in the fall.

The Palo Verde nuclear plant, about 55 miles west of downtown Phoenix, has three units capable of generating more than 4,000 MW. The station is operated by APS and jointly owned by APS, Salt River Project, Southern California Edison Co., El Paso Electric Co. (NYSE: EE), Public Service Co. of New Mexico, Southern California Public Power Authority and the Los Angeles Department of Water & Power.

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