[1] Ships powered by the reactor were decommissioned at around the end of the 20th century.
The D2G designation stands for: Two of these nuclear reactors were installed on each of the Bainbridge, Truxtun, California, and Virginia classes of guided missile cruisers.
The only nuclear-powered cruiser in the United States Navy not equipped with a D2G reactor was the world's first nuclear cruiser, the USS Long Beach (CGN-9), which used two C1W reactors.
[1] Each D2G reactor was rated for a maximum thermal output of 148 megawatts (198,000 hp), with two steam turbines which drove two shafts, each generating between 30,000 and 35,000 shaft horsepower (22,000 and 26,000 kW).
One reactor was located in the aft of the hull, the other in the fore.