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                      ヨシダが選んだ「きょうのできごと特集号」
                      (きょうのできごと実績一覧表:Eng&Jpn

               ウィキペディアからヨシダが選んだ 2月18日のできごと
                     
  Events February 18, Yoshida-selected
日本語版:「1955年-アメリカ合衆国の第14次の核実験ティーポット作戦」が始まる。」
English Edition:"1955Operation Teapot: Teapot test shot "Wasp" is successfully detonated at the Nevada Test Site with a yield of 1.2 kilotons. Wasp is the first of fourteen shots in the Teapot series."

             "Operation Teapot 1955 - Nevada Proving Ground-RADIO CHEMISTRY SOCIETY"
        "Operation Teapot-Wikipedia"      "operation teapot 1955-pictures"
                         (The 53-photo-13-line-attached file/277.75KB)

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             "Operation Teapot 1955 - Nevada Proving Ground-RADIO CHEMISTRY SOCIETY"
Teapot was authorized by President Eisenhower on 30 August 1954. This series of fourteen shots proof tested a broad variety of fission devices with low to moderate yields. As a group these devices combined several innovations - some previously tested, some introduced during this test series - to create a new pattern of fission device that would dominate the design of all later weapons. These devices used new compact, efficient, light weight spherical implosion systems; beryllium tampers; hollow cores; deuterium-tritium boosting; and the use of neutron pulse tubes as initiators to create light, compact, efficient, and reliable fission explosive systems.

These devices were tested for a broad variety of tactical weapon applications, including air defense (AD) and anti-submarine warfare (ASW). Several new primaries were tested for a new generation of lighter and more compact (Class "D") thermonuclear weapons to be fired in 1956 during Operation Redwing.

Weapons effects tests were scheduled to develop information on the use of nuclear explosives against aircraft, and to gain more information about cratering.

UCRL (University of California Radiation Laboratory, now the Lawrence Livermore National Laboratory - LLNL) had its first successful test shots after two and a half years of trying. UCRL demonstrated linear implosion - a non-lensed implosion approach used in artillery shells and other applications where very small diameter systems are required.

Approximately 8000 DOD personnel participated in the Desert Rock VI exercise which was intended to familiarize troops with the capabilities of nuclear weapons, and the conditions of atomic combat.

LANL test shots were named after flying insects, fruits, and vegetables. UCRL test shots were named after inventors and San Francisco streets. DOD shot names were abbreviations or abbreviation mnemonics.

Teapot released some 24,500 kilocuries of radioiodine (I-131) into the atmosphere (for comparison, Trinity released about 3200 kilocuries of radioiodine). This produced total civilian radiation exposures amounting to 41 million person-rads of thyroid tissue exposure (about 11% of all exposure due to continental nuclear tests). This can be expected to eventually cause about 13,000 cases of thyroid cancer, leading to some 650 deaths. Chart of fallout exposures from Teapot. From National Cancer Institute Study Estimating Thyroid Doses of I-131 Received by Americans From Nevada Atmospheric Nuclear Bomb Test, 1997. Go to the National Cancer Institute and get the full report.

2月18日 February 18

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