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Note that these are only for the fireball component of the explosion — radiation, blast, and heat would extend far beyond these distances (i.e. for the Tsar Bomba, anyplace with 6.56 km would receive 500 rems of radiation, there would be near total fatalities for the air blast within 9.95 km, structural damage at 26.26 km, and third-degree ...
The Castle Bravo device was housed in a cylinder that weighed 23,500 pounds (10,700 kg) and measured 179.5 inches (456 cm) in length and 53.9 inches (137 cm) in diameter. [ 3 ] The primary device was a COBRA deuterium-tritium gas-boosted atomic bomb made by Los Alamos Scientific Laboratory , a very compact MK 7 device.
Comparative fireball radii for a selection of nuclear weapons. [citation needed] Contrary to the image, which may depict the initial fireball radius, the maximum average fireball radius of Castle Bravo, a 15-megatonne yield surface burst, is 3.3 to 3.7 km (2.1 to 2.3 mi), [6] [7] and not the 1.42 km displayed in the image.
But as was discovered in the first test of this type of device, Castle Bravo, when lithium-7 is present, one also has some amounts of the following two net reactions: 7 Li + 1 n → 3 T + 4 He + 1 n 7 Li + 2 H → 2 4 He + 1 n + 15.123 MeV. Most lithium is 7 Li, and this gave Castle Bravo a yield 2.5 times larger than expected. [16]
The second series of tests in 1954 was codenamed Operation Castle. The first detonation was Castle Bravo, which tested a new design utilizing a dry-fuel thermonuclear bomb. It was detonated at dawn on March 1, 1954. Scientists miscalculated: the 15 Mt of TNT nuclear explosion far exceeded the expected yield of 4–8 Mt of TNT (6 predicted). [6]
English: Diameter and temperature vs. time of the fireball of a 20 kiloton nuclear air burst (near sea-level). Self-generated fit of curves in Glasstone & Dolan, The Effects of Nuclear Weapons (1977).
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Castle Bravo detonation, 1st Mar 1954 The liquid deuterium fuel of Ivy Mike was impractical for a deployable weapon, and the next advance was to use a solid lithium deuteride fusion fuel instead. In 1954 this was tested in the " Castle Bravo " shot (the device was code-named Shrimp ), which had a yield of 15 Mt (63 PJ ) (2.5 times expected) and ...