The unit 6 of 1,550-megawatt (MW) plant, which supplies electricity to nine states, where a boiler exploded yesterday killing 26 workers, is under shut down, the power PSU said.
"This is to inform that Unit#6 (500 MW) of Feroze Gandhi Unchahar Thermal Power Station, Raebareli,Uttar Pradesh, is under shutdown after an accident in the evening of November 1, 2017. The other five units of the station are operating normally," NTPC said in a statement.
The 500 MW unit was made operational in March this year where a boiler blasted yesterday.
NTPC has initiated an enquiry to investigate the reason for blast in the boiler of th 500 MW unit at the Unchhhar power plant.
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Asked about the timeline for completing the enquiry, a senior NTPC official said that it would be completed at the earliest in view of severity of the accident.
The official also said that the shut down of 500 MW unit has not resulted in any short supply to customers and power plant is still generating 630 MW out of total operational capacity of 1,050 MW at present.
In a statement yesterday, NTPC had said that at unit number six of its Unchahar plant, there was a sudden abnormal sound at 20-meter elevation around 3:30 yesterday afternoon.
There was an opening in corner number two from which gases and steam "escaped" affecting the people working around the area, it had said.
NTPC shares were trading at Rs 180.10 per piece down 0.03 per cent at BSE this afternoon.