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Nuclear plant unit ramping back up after ‘unusual event’

PHOENIX — A Palo Verde Nuclear Generating Station reactor unit is nearly
back to full production after what’s described as a minor explosion in an
electrical cabinet.

Arizona Public Service Co. reported the Tuesday night incident as an “unusual
event,” the lowest of four emergency levels classified by the federal Nuclear
Regulatory Commission.

APS spokesman Betty Dayyo said the explosion consisted of arcing
inside a cabinet that routes electricity to equipment in a turbine building.

Dayyo said the cause is under investigation.

APS said no radioactive material was released from the three-reactor plant 50
miles west of downtown Phoenix.

Arizona, California, New Mexico and Texas
utilities own the plant.

Palo Verde’s Unit 1 reduced its power production to 60 percent but started
ramping back up Thursday, reaching 93 percent by Friday morning.

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