UPDATE 1-France's EDF extends Flamanville 1 & 2 nuclear reactors outages

(Adds details, background)

PARIS, Dec 17 (Reuters) - France’s EDF has prolonged outages at its Flamanville 1 and 2 nuclear reactors by a month until the end of January and February respectively, the state-controlled utility said on Tuesday.

EDF did not provide reasons for the latest outage extensions, but added that the duration of the shutdown of the reactors could be extended due to complex maintenance.

The 1,300 megawatt capacity Flamanville 1 reactor in the north of France has been offline since Sept. 18 and was scheduled to restart on Dec 31.

EDF said it is now expected to restart on Jan. 31, 2020.

Power generation at the similar Flamanville 2 was halted on Jan. 10 for its third 10-year maintenance overhaul and upgrade.

It was expected to resume production on Jan. 31, 2020, but is now expected to resume output on Feb. 29, EDF said.

French nuclear safety agency ASN placed both reactors at the Flamanville nuclear power plant under increased surveillance in September following what it said were a high number of significant shortcomings in maintenance and contractor oversight. (Reporting by Bate Felix; editing by Louise Heavens and Jason Neely)