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Frenchman Flat
Frenchman Flat is a hydrographic basin in the Nevada National Security Site south of Yucca Flat and north of Mercury, Nevada. The flat was used as an and has a dry lake bed (Frenchman Lake) that was used as a 1950s airstrip before it was chosen after the start of the Korean War for the Nevada Proving Grounds. Nellis Air Force Base land was transferred to the Atomic Energy Commission on which Site Mercury was constructed on the flat for supporting .〔 The 1951 Operation Ranger "Able" test (ground zero at UTM Coordinates 923758 on the flat) was the first continental US nuclear detonation after the 1945 Trinity test, and Frenchman Flat also had the only detonation of an American artillery-fired nuclear projectile in the 1953 Upshot-Knothole Grable test using the M65 Atomic Cannon.
==Area 5==
Area 5 consists of of the southeastern portion of NTS, north of the town of Mercury, and includes the Area 5 Radioactive Waste Management Site, the Hazardous Waste Storage Unit, and the Spill Test Facility. In the decade 1951–1962, 14 above ground nuclear tests were conducted at Frenchman Flat; several of these atmospheric tests were weapons effects tests. A relatively modest 8-kiloton blast in January 1951 broke storefront windows in Las Vegas.〔Gerald H. Clarfield and William M. Wiecek (1984). ''Nuclear America:Military and Civilian Nuclear Power in the United States 1940–1980'', Harper & Row, New York, p. 203.〕
Tests to determine building damage by nuclear blast left remains at the site, remains that are of historical interest. Five underground nuclear weapons were detonated at Frenchman Flat between 1965 and 1968. A carbonate aquifer makes Area 5 not as well suited to underground testing, so there were fewer detonations carried out.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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