UPDATE 2-FPL Turkey Pt gas unit on; reactors shut

(Recasts lead, adds company comment)

NEW YORK, Feb 27 (Reuters) - FPL Group Inc (FPL.N) has returned gas generators at the Turkey Point power plant in Florida while both 693-megawatt nuclear units remained shut in the wake of Tuesday's blackout, a spokesman said.

FPL said it is preparing to restart the reactors but will first complete other maintenance, a spokeswoman for the plant said Wednesday.

Another FPL spokesman said fossil-generation at the plant had restarted on Wednesday but could not immediately name which unit had restarted.

The two reactors and some gas-fired units at the site shut from full power on Tuesday in response to an under-voltage event caused when two power lines between Miami and Daytona tripped following an equipment malfunction in a Miami substation, the company said.

Equipment problems triggered a blackout that affected more than two million people in Florida for several hours.

The utility said workers restored power to all customers affected by the blackout by 5:15 p.m. Eastern time (2215 GMT) on Tuesday.

The shutdown, like the cascading blackout that affected customers, was a safety measure to protect plant equipment from abnormal power line voltages.

The Turkey Point spokeswoman could not say when the nuclear units would return to service due in part to competitive reasons. Most power plants put nonessential maintenance work that cannot be done while the unit is operating on hold until the unit shuts for planned or unplanned reasons.