From 1 January until 30 December 2020 the two VVER-1000 units produced 16.55 TWh of electricity breaking a previous record from 2019, the statement said.
The two-unit station in the north of the country is expected to produce 16.62 TWh of electricity by the end of 2020, the statement said.
Kozloduy-5 and -6, Bulgaria’s only units in commercial operation, supply about a third of the country’s electricity.
Kozloduy-5 began commercial operation in 1988, followed by Kozloduy-6 in 1993.
Both units received 10-year operating lifetime extensions by the authorities in 2017 and 2019.
In April 2018, Bulgaria’s nuclear regulator licensed Kozloduy-6 to operate at 104% of its design capacity. Work is under way on a similar planned uprate for Unit 5.