The real cause of Xcel's lengthy Prairie Island nuclear outage: workers drilled through cables

Xcel Energy initially pinpointed the cause of a lengthy outage at its Prairie Island nuclear power plant as an equipment issue between the turbine and the electric grid. But that didn't quite tell the full story: Xcel workers at the plant actually cut a bundle of power cables when drilling sideways underground last October, interrupting power to some of the Red Wing plant's equipment and ...

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