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Vastrap
Vastrap (Stand firm) is a small military airfield situated in the Kalahari Desert north east of Upington inside a 700 square kilometre weapons test range of the same name belonging to the South African National Defence Force. It was constructed to allow the SAAF to practice tactical bombing operations, and for aircraft to service the SADF's defunct underground nuclear weapon test site. ==Atomic testing== The area was selected for nuclear weapons testing due to its remoteness, low population density, stable geological formations and lack of underground rivers. Two underground shafts and in depth and in diameter were drilled from 1975-1977. Neither was ever used to perform a detonation, although instrumented tests were performed. The shafts were sealed with sand and concrete under the supervision of the International Atomic Energy Agency in July 1993.〔(【引用サイトリンク】date=2007-07-24 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Vastrap」の詳細全文を読む
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