use. Shippingport, while somewhat smaller than a large commercial reactor today, was representative, with four steam generators, pressurizer and reactor. The reactor alone, when packaged for shipment, weighed in excess of 1000 tons (921 tons weight of the vessel plus the weight of a structural steel shipping skid) and was successfully shipped by waterway for burial at the Hanford Reservation. The reactor vessel from Trojan Nuclear Power Plant (located in Oregon), was also successfully shipped by waterway to the Hanford site; a much shorter trip than the Shippingport reactor. Subsequent to Shippingport's decommissioning, three other large commercial reactors have been entirely leveled: Yankee Rowe Nuclear Power Station having been entirely decommissioned in 2007 with the U.S. Nuclear Regulatory Commission (NRC) notifying Yankee that August that the former plant site had been fully decommissioned in accordance with NRC procedures and regulations; Maine Yankee Nuclear Power Plant completely decommissioned in 2005; and Connecticut Yankee Nuclear Power Plant. All three prior commercial reactor sites have been returned to greenfield conditions and are open to visitors. See also Beaver Valley Nuclear Generating Station – a newer nuclear power station located at the same site Obninsk Nuclear Power Plant – a 5 MWe Soviet pilot plant (1954) Notes References External links Brief history of site Note: The picture above is the original site. This link shows the site after 1974 when Beaver Valley Units 1 and 2 were built adjacent the Shippingport Atomic Plant Shippingport and Eisenhower Shippingport Atomic Power Station-related items in the Naval Reactors History Database Light-Water Breeder Reactor (LWBR)-related items in the Naval Reactors History Database Shippingport Operations with the Light Water Breeder Reactor Core Water Cooled Breeder Program Summary Report October 1987 "Atoms for Peace" in Pennsylvania Jimmy Carter: Shippingport Light Water Breeder Reactor Remarks at a Ceremony Marking the Pennsylvania Facility's Increase to Full Power Production (December 2, 1977) Fuel Summary Report: Shippingport Light Water Breeder Reactor September 2002 Slow breeder makes its own nuclear fuel (Popular Science) April 1978 Energy infrastructure completed in 1958 Former nuclear power stations in the United States Historic American Engineering Record in Pennsylvania Nuclear power plants in Pennsylvania Nuclear reactors Atoms for Peace Buildings and structures in Beaver County, Pennsylvania Nuclear power stations using pressurized water reactors Former power stations in Pennsylvania