"Output from its nuclear power plants in the UK was at the record level of 65.1 TWh, up 4.5 TWh, on the "excellent operational performance" of the units.
"Nuclear generation in 2016 benefitted from the very high level of fleet availability and a historically-low rate of unplanned outages," EDF said.
UK subsidiary EDF Energy invested £529 million ($660 million) in its eight nuclear power plants.
"During a period of depressed prices, an effective carbon price floor and capacity market have been critical in giving EDF Energy the confidence to invest and extend the operating lives of these power stations, providing the UK with reliable, low-carbon electricity," it said.
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