NEW YORK - Dominion Resources Inc's 556-megawatt Kewaunee nuclear power unit in Wisconsin was shut by early Monday, the U.S. Nuclear Regulatory Commission said in its power reactor status report.

The unit, in Kewaunee, about 30 miles from Green Bay, had been running at full power on Friday.

Based on historical outages at the plant, it was slated to shut for a month long refueling and maintenance outage until about Oct. 26.

One MW powers about 800 homes in Wisconsin.

Dominion, of Richmond, Virginia, owns and operates about 27,000 MW of generating capacity, markets energy commodities and transmits and distributes electricity to 2.4 million customers in Virginia and North Carolina. (Reporting by Eileen Moustakis; Editing by John Picinich)