PRAGUE (Dow Jones)--Rolls-Royce Group PLC (RR.LN) Wednesday said it has signed a contract with Slovenske Elektrarne, Enel SpA's (ENEL.MI) Slovak electricity unit, to supply equipment for Slovakia's Mochovce nuclear power plant. No financial details of the contract were disclosed. Rolls-Royce will deliver its Spinline Neutron Instrumentation System for units 3 and 4 of Mochovce, which are currently under construction. Rolls-Royce has already delivered the same system to the existing number two Czech nuclear power plant, operated by CEZ AS (BAACEZ.PR), in the southeastern Czech town of Dukovany. -By Leos Rousek, Dow Jones Newswires; +420 22 315 290; [email protected] (END) Dow Jones Newswires June 16, 2010 09:41 ET (13:41 GMT)