Yuzhnoukrainsk nuclear power plant (NPP) at 15:19 Kyiv time on December 27, 2014, reconnected its second reactor to the power grid after maintenance repairs, the plant's press service reported on Saturday.

"All safety regulations were observed during the reconnection of the reactor," the report said.

Yuzhnoukrainsk NPP reactor No. 2 was disconnected in the morning of December 26, 2014, due to a fault in the cooling system of low-pressure heater No. 2 at the turbine plant.

Currently, 12 out of the 15 units of all four active NPPs in Ukraine are operational.

Yuzhnoukrainsk NPP reactor No. 3 saw its 20th day of scheduled repairs (until April 5, 2015), while Rivne NPP reactor No. 1 saw its 4th day of its scheduled overhaul (until March 5, 2015).

The radiation exposure rate, safety and environmental indicators at all the Ukrainian NPPs are within normal parameters.

Yuzhnoukrainsk NPP with three VVER reactors, each one with the generating capacity of 1 gigawatt, is located in Mykolaiv region. The first reactor was put into service on January 31, 1982, the second on January 6, 1985, and the third on September 20, 1989.

Energoatom is the operator of all four nuclear power plants currently operating in Ukraine: the Zaporizhia, Yuzhnoukrainsk, Rivne and Khmelnytsky power plants with 15 pressurized light water reactors and a total rated capacity of 13.835 gigawatts.