(ANSA) - BELGRADE, AUG 24 - Three of the four units at the Paks nuclear power plant (southern Hungary) have been reconnected as the Danube level rises. The risk of an energy crisis is no longer present, according to Prime Minister Peter Magyar, who spoke from the site of the construction of a submerged dam on the Danube to contain water and raise river levels. The plant, which provides nearly half of the country's electricity, is cooled by Danube water, and a record drop in the river level forced the reactors to be partially shut down. Hungary was thus forced to import electricity from neighbouring countries at a high cost. Construction of the submerged dam, which involved pouring several thousand tonnes of rock into the river, moved faster than anticipated, and the water level reached a safe level for the power plant. (ANSA).