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About: Operation Prairie Flat     Goto   Sponge   NotDistinct   Permalink

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Operation Prairie Flat was a test involving the detonation of a 500-short-ton (450 t) spherical surface charge of TNT to evaluate airblast, ground shock and thermal effects of nuclear weapons. Since TNT charges produce roughly double the airburst effect of nuclear weapons, it allowed testing the equivalent of a 1 kiloton of TNT (4.2 TJ) nuclear weapon surface burst. It was a continuation of the technical co-operation (Canada, United States, Great Britain) series of tests sponsored jointly by the respective governments. Similar to previous tests, a large number of projects were carried out simultaneously due to the infrequent opportunity and cost of large explosives tests – the United States alone conducted 39 projects. The resulting airblast also allowed testing various targets at a range