A federal court judge has scheduled a hearing on June 4 on a challenge by the owner of the Vermont Yankee nuclear power plant.
Entergy Corp. sued the state last month, saying regulators have delayed approval of a backup emergency diesel generator.
Yankee has been ordered by the U.S. Nuclear Regulatory Commission to install a backup power source by September.
Vermont Public Radio reports Yankee says it needs to start construction by June 11 to get the equipment on line by September.
The state Public Service Board hasn't granted a permit. In April, it said it is considering whether it can grant approval when Entergy "is not in compliance" with existing state orders covering Yankee's continued operation.
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