Northrop Grumman selected to provide turbine generator units for U.S. Northrop Grumman Corporation announced it has been awarded a contract by shipbuilder General Dynamics Electric Boat to complete detailed design and subsequent manufacturing, assembly, qualification and delivery of the first turbine generator units for the Ohio Replacement Program (ORP), the U.S. Navy's next-generation ballistic nuclear submarine. The turbine generators provide all of the submarine's propulsion and other electrical power requirements.