Hanford reactors
When was Reactor D started?
Manhattan Project
CIRUS reactor Convair NB-36H Idaho National Laboratory Carolinas–Virginia Tube Reactor D1G reactor
CIRUS_reactor-Abstract Convair_NB-36H-Reactor Idaho_National_Laboratory-Materials_Test_Reactor_(MTR) Carolinas–Virginia_Tube_Reactor-Purpose D1G_reactor-Abstract
CIRUS (Canadian-Indian Reactor, U.S.) was a research reactor at the Bhabha Atomic Research Center (BARC) in Trombay near Mumbai, India. CIRUS was supplied by Canada in 1954, but used heavy water (deuterium oxide) supplied by the United States. It was the second nuclear reactor to be built in India. It was modeled on the Canadian Chalk River National Research X-perimental (NRX) reactor. The 40 MW reactor used natural uranium fuel, while using heavy water as a moderator. It is a tank reactor type with a core size of 3.14 m (H) × 2.67 m (D). It first went critical July 10, 1960. The reactor was not under IAEA safeguards (which did not exist when the reactor was sold), although Canada stipulated, and the U.S. supply contract for the heavy water explicitly specified, that it only be used for peaceful purposes. Nonetheless, CIRUS produced some of India's initial weapon plutonium stockpile, as well as the plutonium for India's 1974 Pokhran-I (Codename Smiling Buddha) nuclear test, the country's first nuclear test. At a capacity factor of 50–80%, CIRUS can produce 6.6–10.5 kg of plutonium a year.CIRUS was shut down in September 1997 for refurbishment and was scheduled to resume operation in 2003. The reactor was brought back into operation two years late in 2005. During refurbishing, a low-temperature vacuum evaporation-based desalination unit was also coupled to the reactor to serve as demonstration of using waste heat from a research reactor for sea desalination. Even if the reactor has a life of twenty more years, India had declared that this reactor would be shut down by 2010 in accordance with the Indo-US nuclear accord reached between Indian Prime Minister Manmohan Singh and US President George W. Bush. The reactor was shut down on 31 December 2010. 
The reactor was a 1 MW(thermal?) output reactor.  
When the nuclear industry was just getting started in the early 1950s, it was difficult to predict exactly how different kinds of metals and other materials would be affected by being used in a reactor for prolonged periods of time. MTR was a research reactor jointly designed by Argonne and Oak Ridge National Laboratories that operated until 1970 and provided important data, helping researchers make nuclear power reactors safer and longer lasting. 
Construction started on January 1, 1960. The CVTR was built to test the concept of a heavy water moderated and cooled pressurized tube reactor for civilian power. It was the first US heavy water power reactor. 
The D1G reactor was a prototype naval reactor designed for the United States Navy to provide electricity generation and propulsion on warships. The D1G designation stands for:  D = Destroyer platform  1 = First generation core designed by the contractor  G = General Electric was the contracted designer This prototype nuclear reactor was constructed for the United States Department of Energy's Office of Naval Reactors as part of the Naval Nuclear Propulsion Program. The reactor was built by General Electric and operated by the Knolls Atomic Power Laboratory at the Kesselring Site Operation in West Milton, New York. It was used for testing components and as a training tool for the Nuclear Power Training Unit. The reactor operated from 1962 to 1996, when it was shut down in March of that year. It was later defuelled, with the pressure vessel eventually removed in 2002. The containment vessel — which housed both the primary (nuclear reactor) and secondary (steam plant) systems — is referred to as the "DIG-ball" due to its unique shape: a Horton Sphere. The sphere was originally constructed by Chicago Bridge and Iron Works to house the liquid metal cooled reactor of the USS "Seawolf" (SSN-575), with the dome designed to contain a liquid sodium explosion. 