April 22 (SeeNews) - Nuclearelectrica [BSE:SNN], the operator of Romania's sole nuclear power plant Cernavoda, will put up for sale 397.5 gigawatt-hours (GWh) of electricity on the local power market hoping to earn nearly 66 million lei ($20.4 million/14.8 million euro), data from the power market operator, OPCOM, showed.