...plant Bulgaria is building at the town of Belene, state utility NETC said on Wednesday.
Czech power producer CEZ , Italy's Enel , Germany's E.ON and RWE , France's EdF and Spain's Endesa have filed bids for the minority stake in the 2,000 megawatt plant.
Swiss energy firms EGL and Atel , as well as Belgium's Electrabel and the Bulgarian unit of Belgian copper refiner Cumerio have also put in bids.
NETC said it would shortlist potential investors to which it will send a detailed memorandum. It plans to pick a winner by the end of the year and wrap up the deal next February.