The Nuclear Power Plant in Cernavodă is a nuclear power plant in Romania. It produces around 20% of the country's electricity. It uses CANDU reactor technology from AECL, using heavy water produced at Drobeta-Turnu Severin as its neutron moderator and water from the Danube – Black Sea Canal for cooling. The power plant was designed in Canada by Atomic Energy of Canada Limited in the 1980s, during the Communist era. The initial plan was to build five units. Units 1 and 2 are currently fully operational. Three more partially completed CANDU reactors exist on the same site, part of a project discontinued at the close of the Nicolae Ceauşescu regime. Units 3 and 4 are in their planning stages, with expected completion dates of 2014 and 2015 respectively.