Control room operators disconnected Indian Point’s Unit 3 nuclear power plant from the electrical grid Feb. 28 in order to troubleshoot an issue with an auxiliary electrical transformer. The plant is owned by Entergy (NYSE: ETR).
Operators had observed an increase in gases within the transformer oil during routine sampling. An increase in gases is an indicator of potential transformer degradation. Repairs to the transformer can only be done when the transformer is disconnected from the electrical generator.
The plant will return to service after the auxiliary transformer is disconnected and alternate power to the affected equipment is provided.
There was no release of radioactivity and no threat to the safety of workers or the public. The Nuclear Regulatory Commission was notified.
Unit 2 continues to operate at full power.
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