UPDATE 1-Progress Fla Crystal River to hit full power Sat.

(Updates with company comment, return to full power Saturday)

NEW YORK, Aug 29 (Reuters) - The 838-megawatt nuclear unit at Progress Energy Inc's (PGN.N) Crystal River power plant in Florida was expected to reach full power output early Saturday, a company spokesman said on Friday.

On Friday, the unit was holding at 60 percent power while workers conducted tests after a four-day forced outage.

The reactor tripped off-line Sunday because of a cooling water flow issue. A condensate pump became uncoupled, lowering condensate flow, a Nuclear Regulatory Commission event report said this week.

The plant is located in Red Level, Florida, about 85 miles north of Tampa.

The 3,151 MW Crystal River station also includes four coal-fired units -- the 379-MW Unit 1 (which began service in 1966), the 491 MW Unit 2 (1969), the 721 MW Unit 4 (1984) and the 722 MW Unit 5 (1982) -- as well as the nuclear unit.

One MW powers about 300 homes in Florida.

Progress Energy operates the reactor and owns all of the coal units.

Several companies own Unit 3, including Progress (90.45 percent), Seminole Electric Cooperative (1.7 percent), Orlando Utilities Commission (1.6 percent), Gainesville-Alachua City Utility (1.41 percent), Tallahassee Electric Department (1.33 percent), Ocala Utilities Division (1.33 percent), Leesburg Municipal Electric Department (0.82 percent), Kissimmee Utilities (0.68 percent), New Smyrna Beach Utility Commission (0.56 percent), Alachua Electric Department (0.08 percent) and Bushnell Utility Department (0.04 percent).