Operation Mandrel

Operation Mandrel
Mandrel Mint Leaf tunnel reentry team
Information
Country	United States
Test site	Amchitka Island, Alaska; near Parachute, Colorado; NTS Area 12, Rainier Mesa; NTS Area 16, Shoshone Mountain; NTS Area 19, 20, Pahute Mesa; NTS Areas 5, 11, Frenchman Flat; NTS, Areas 1-4, 6-10, Yucca Flat
Period	1969-1970
Number of tests	52
Test type	underground shaft, underground tunnel
Max. yield	1.9 megatonnes of TNT (7.9 PJ)
Navigation
Previous test series	Operation Bowline
Next test series	Operation Emery

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The United States's Mandrel nuclear test series was a group of 52 nuclear tests conducted in 1969-1970. These tests followed the Operation Bowline series and preceded the Operation Emery series.

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