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Nuclear update: Output rises with return of several units

Total U.S. nuclear plant availability rose to 91.65% early June 12, up from 90.79% on June 9 but below the 93.65% reported on the same day in 2016.

Working to boost total production was the return of several units to full or near full power. Riverstone Holdings LLC's Susquehanna 1 reactor in Pennsylvania ramped to 81% as of early June 12. The unit had been offline after it scrammed shut June 8.

Exelon Corp.'s LaSalle 2 unit in Illinois reached 100% as of early June 12. The reactor was warming up at 12% early June 9 after being taken offline June 7 for undisclosed reasons.

Additionally, Tennessee Valley Authority's Watts Bar 1 unit in Tennessee was seen at 100% as of early June 12, up from 76% on June 9. Ameren Corp.'s Callaway nuclear unit in Missouri was eyed at 100% as of early June 12, rising from 60% on June 9.

Entergy Corp.'s River Bend 1 in Louisiana resumed 100% power as of early June 12, up from 85% on June 9.

On the flip side, Exelon's Clinton Power Station in Illinois was offline at 1% early June 12, down from 98% on June 9. According to a report filed with the U.S. Nuclear Regulatory Commission, operators manually scrammed the reactor due to a loss of feedwater heating.

Also, Entergy's Indian Point 3 in New York was shut as of early June 12, down from 100% on June 9. A filing with the NRC showed the unit was shut following a body/bonnet leak on the inlet valve to the reactor coolant filter.

For details of U.S. nuclear power plant operations, visit our Nuclear Status and Output Page.