In what state was the location of the nuclear detonation that was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project?
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McDonald Ranch House The McDonald Ranch House, also known as Trinity Site, in the Oscura Mountains of Socorro County, New Mexico, was the location of assembly of the world's first nuclear weapon. The active components of the Trinity test "gadget", a plutonium Fat Man-type bomb similar to that later dropped on Nagasaki, Japan, were assembled there on July 13, 1945. The completed bomb was winched up the test tower the following day and detonated on July 16, 1945 as the Trinity nuclear test.
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Trinity (nuclear test) Trinity was the code name of the first detonation of a nuclear weapon. It was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project. The test was conducted in the Jornada del Muerto desert about 35 miles (56 km) southeast of Socorro, New Mexico, on what was then the USAAF Alamogordo Bombing and Gunnery Range (now part of White Sands Missile Range). The only structures originally in the vicinity were the McDonald Ranch House and its ancillary buildings, which scientists used as a laboratory for testing bomb components. A base camp was constructed, and there were 425 people present on the weekend of the test.
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Bombing of Aomori in World War II The Bombing of Aomori in World War II (青森大空襲 , Aomori dai-kūshū ) on July 28, 1945 was part of the strategic bombing campaign waged by the United States of America against military and civilian targets and population centers during the Japan home islands campaign in the closing stages of World War II.
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Fort Wainwright Fort Wainwright is a United States Army post adjacent to Fairbanks in the U.S. state of Alaska. It is part of the Fairbanks, Alaska Metropolitan Statistical Area. Since 1978 Fort Wainwright has been investigating and cleaning up soil and water contamination from a landfill and drum burial site, fuel terminal, coal storage yard/fire training pits, open detonation area and underground storage tanks. It was Superfund-listed in 1990.
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Association of Los Alamos Scientists The Association of Los Alamos Scientists (ALAS) was founded on 30 August 1945, by a group of scientists, who had worked on the development of the atomic bomb at the Los Alamos Laboratory, a division of the Manhattan Project.
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Upshot-Knothole Simon Upshot–Knothole Simon was a nuclear detonation conducted as part of the U.S. Operation Upshot–Knothole nuclear testing program. Simon was conducted on 25 April 1953 at the Nevada Test Site, and tested the TX-17/24 thermonuclear weapon design which had a yield of 43 kilotons.
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Raemer Schreiber Raemer Edgar Schreiber (November 11, 1910 – December 24, 1998) was an American physicist from McMinnville, Oregon who served Los Alamos National Laboratory during World War II, participating in the development of the atomic bomb. He saw the first one detonated in the Trinity nuclear test in July 1945, and prepared the Fat Man bomb that was used in the bombing of Nagasaki. After the war, he served at Los Alamos as a group leader, and was involved in the design of the hydrogen bomb. In 1955, he became the head of its Nuclear Rocket Propulsion (N) Division, which developed the first nuclear-powered rockets. He served as deputy director of the laboratory from 1972 until his retirement in 1974.
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Edgewood Arsenal human experiments From 1948 to 1975, the U.S. Army Chemical Corps conducted classified human subject research at the Edgewood Arsenal facility in Maryland. The purpose was to evaluate the impact of low-dose chemical warfare agents on military personnel and to test protective clothing, pharmaceuticals, and vaccines. A small portion of these studies were directed at psychochemical warfare and grouped under the prosaic title of the "Medical Research Volunteer Program" (1956–1975). The MRVP was also driven by intelligence requirements and the need for new and more effective interrogation techniques.
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Point Beach Nuclear Plant Point Beach Nuclear Plant is a nuclear power plant located on Lake Michigan north of Two Rivers, Wisconsin, USA.
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Salted bomb A salted bomb is a nuclear weapon designed to function as a radiological weapon, producing enhanced quantities of radioactive fallout, rendering a large area uninhabitable. The term is derived both from the means of their manufacture, which involves the incorporation of additional elements to a standard atomic weapon, and from the expression "to salt the earth", meaning to render an area uninhabitable for generations. The idea originated with Hungarian-American physicist Leo Szilard, in February 1950. His intent was not to propose that such a weapon be built, but to show that nuclear weapon technology would soon reach the point where it could end human life on Earth. No intentionally salted bomb has ever been atmospherically tested, however the UK tested a 1 kiloton bomb incorporating a small amount of cobalt as an experimental radiochemical tracer at their Tadje testing site in Maralinga range, Australia, on September 14, 1957. Furthermore the triple "taiga" nuclear salvo test, as part of the preliminary March 1971 Pechora–Kama Canal project, produced substantial amounts of Co-60, with this fusion generated neutron activation product being responsible for about half of the gamma dose now (2011) at the test site.
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SM-1 SM-1 was a 2-megawatt nuclear reactor developed by the United States Atomic Energy Commission for the US Army Nuclear Power Program (ANPP) in the mid-1950s. The compact "package" reactor was designed to produce electricity and generate heat for remote military facilities. The first, the SM-1, served as the Army's primary training facility to train reactor operations personnel from all three services (Army, Navy and Air Force). In 1954, the Department of Defense placed the US Army in charge of all military nuclear power plants except those used for propulsion by the US Navy. The Army's Chief of Engineers established the US Army Engineer Reactors Group in April 1954, and decided to construct the SM-1 facility at the Corps of Engineers headquarters at Fort Belvoir, Virginia, about 18 miles south of Washington, D.C.. About 800 personnel were trained on the SM-1 during its operational life, from 1957 to 1973. The power plant was shut down in March 1973, and is monitored within a "restricted access" section of the post. Inspectors enter the shut-down operations control room every decade or so, and the building may be demolished "about 50 years" after the reactor core was removed, possibly around 2030.
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Armed Forces Special Weapons Project The Armed Forces Special Weapons Project (AFSWP) was a United States military agency responsible for those aspects of nuclear weapons remaining under military control after the Manhattan Project was succeeded by the Atomic Energy Commission on 1 January 1947. These responsibilities included the maintenance, storage, surveillance, security and handling of nuclear weapons, as well as supporting nuclear testing. The AFSWP was a joint organization, staffed by the United States Army, United States Navy and United States Air Force; its chief was supported by deputies from the other two services. Major General Leslie R. Groves, the former head of the Manhattan Project, was its first chief.
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B46 nuclear bomb The B46 nuclear bomb (or Mk-46) was a tested but never deployed American high-yield thermonuclear bomb which was designed and tested in the late 1950s. Though originally intended to be a production design, the B46 ended up being only an intermediate prototype which was test fired several times. These prototypes were known as TX-46 units (Test/Experimental).
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Joint Base McGuire–Dix–Lakehurst Joint Base McGuire–Dix–Lakehurst (JB MDL) is a United States military facility located 18 mi southeast of Trenton, New Jersey.
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Operation Sunbeam Operation Sunbeam was a series of four nuclear tests conducted at the United States of America's Nevada Test Site in 1962. "Operation Sunbeam" tested small, "tactical" nuclear warheads; the most notable was the "Davy Crockett". "Operation Sunbeam" was also known as "Operation Dominic II".
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South Texas Nuclear Generating Station The South Texas Nuclear Project Electric Generating Station (also known as STNP, STPEGS, South Texas Nuclear Project), is a nuclear power station southwest of Bay City, Texas, United States. The STNP occupies a 12200 acre site on the Colorado River about 90 mi southwest of Houston. It consists of two Westinghouse Pressurized Water Reactors and is cooled by a 7000 acre reservoir, which eliminates the need for cooling towers.
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Program 477L Program 477L (477L), also known as NUDETS (NUclear DETonation System) was a Cold War-era system used to monitor nuclear detonations over the Continental United States.
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Operation Ivy Operation Ivy was the eighth series of American nuclear tests, coming after "Tumbler-Snapper" and before "Upshot–Knothole". The two explosions were staged in late 1952 at Eniwetok Atoll in the Pacific Proving Ground in the Marshall Islands.
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West Milton, New York West Milton is a hamlet in Ballston Spa, Saratoga County, New York. It lies at an elevation of 440 feet (134 m). Nearby lies the Knolls Atomic Power Laboratory which develops and maintains nuclear submarine reactors. The facility includes a notable large sphere dome constructed in 1953 to contain any possible radiation leaks from the work done within
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Nuclear history of the United States Nuclear history of the United States describes the history of nuclear affairs in the United States whether civilian or military.
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British contribution to the Manhattan Project Britain contributed to the Manhattan Project by helping initiate the effort to build the first atomic bombs in the United States during World War II, and helped carry it through to completion in August 1945 by supplying crucial expertise. Following the discovery of nuclear fission in uranium, scientists Rudolf Peierls and Otto Frisch at the University of Birmingham calculated, in March 1940, that the critical mass of a metallic sphere of pure uranium-235 was as little as 1 to , and would explode with the power of thousands of tons of dynamite. The Frisch–Peierls memorandum prompted Britain to create an atomic bomb project, known as Tube Alloys. Mark Oliphant, an Australian physicist working in Britain, was instrumental in making the results of the British MAUD Report known in the United States in 1941 by a visit in person. Initially the British project was larger and more advanced, but after the United States entered the war, the American project soon outstripped and dwarfed its British counterpart. The British government then decided to shelve its own nuclear ambitions, and participate in the American project.
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Operation Sandstone Operation Sandstone was a series of nuclear weapon tests in 1948. It was the third series of American tests, following Trinity in 1945 and Crossroads in 1946, and preceding Ranger. Like the Crossroads tests, the Sandstone tests were carried out at the Pacific Proving Grounds, although at Enewetak Atoll rather than Bikini Atoll. They differed from "Crossroads" in that they were conducted by the Atomic Energy Commission, with the armed forces having only a supporting role. The purpose of the Sandstone tests was also different: they were primarily tests of new bomb designs rather than of the effects of nuclear weapons. Three tests were carried out in April and May 1948 by Joint Task Force 7, with a work force of 10,366 personnel, of whom 9,890 were military.