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Nuclear update: Total US plant availability drops with 3 fresh outages

A wave of new maintenance outages pulled total U.S. nuclear power plant availability down to 86.25% by early March 26, down from 87.64% on March 23 but still well above the 82.35% rating reported on the same day in 2017.

Undercutting total U.S. nuclear power production was the loss of three units, including Exelon Corp.'s Limerick 1 in Pennsylvania; unit 1 at Entergy Corp.'s Arkansas Nuclear One plant; and the South Texas Project unit 2, which is owned by NRG Energy Inc., CPS Energy and Austin Energy. All three units were shut for planned refueling and maintenance outages, according to private sources.

In addition, Entergy's Palisades plant in Michigan was at 30% early March 26, down from full power on March 23.

Returning supply at other reactors helped to offset the lost production, most notably from Exelon's LaSalle 1 in Illinois, which was restarted and returned to full power after completing a planned refueling outage that began Feb. 19.

In addition, Talen Energy Corp.'s Susquehanna 1 was returned to 99%, up from 80% on March 23, and Tennessee Valley Authority's Browns Ferry 1 in Alabama was returned to full capacity, up from 91% on March 23. In the West, PG&E Corp.'s Diablo Canyon 2 in California was at 93% power, up from 28% on March 23.

As of early March 26, a total of 13 units across the U.S. were reported offline.

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