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A coolant leak in one of Cooper nuclear power plant’s main turbine generators in southeast Nebraska has been repaired.

The hydrogen leak was repaired before 6 p.m. November 15, said Nebraska Public Power District spokesman Mark Becker. The leak was discovered earlier in the day by maintenance workers.

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The leak didn’t represent a safety threat, and it was not in the power plant’s nuclear systems, officials said. Hydrogen is used to help cool a main turbine generator.

The plant near Brownville, NE, continued operating after the leak was found Tuesday morning.

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The utility notified regulators about the problem, and issued what the Nuclear Regulatory Commission calls a notice of unusual event.

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