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Béryl incident
The "Béryl incident" was a French nuclear test, conducted on May 1, 1962, during which nine soldiers of the 621st Groupe d'Armes Spéciales unit were heavily contaminated by radioactivity.〔(Dossier de présentation des essais nucléaires et leur suivi au Sahara )〕
The test took place at In Eker, Algeria, then a French department, and was designed as an underground shaft test.〔(France's Nuclear Weapons )〕 Due to improper sealing of the shaft, radioactive rock and dust were released into the atmosphere. The soldiers were exposed to as much as 600 mSv. As many as 100 additional personnel were exposed to lower levels of radiation, estimated at about 50 mSv, when the radioactive cloud produced by the blast passed over the command post, due to an unexpected change in wind direction. Among those exposed were several French government officials, including French Defense Minister Pierre Messmer and Gaston Palewski.
==Location==
The site chosen for the test was In Eker (Algerian Sahara), around 150 km north of Tamnarasset. The Taourirt Tan Afella mountain, one of the granite Hoggar Mountains (south of Algeria), after having been the object of geotechnical surveys (erroneously shown as a gold or uranium mine), was kept as a test site. The site was laid out from 1961 onward (on an airfield built northeast of In Amguel and base camp between the Tuareg village of In Amugel and the well in In Eker of which the border was controlled and occupied by gendarmes). A base called DAM Oasis 1, then Oasis 2, was then built to not be visible from the road a few miles east of Tan Affela.
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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